Article
Engineering, Environmental
Lulu Peng, Yanhong Quan, Jinxian Zhao, Jun Ren
Summary: Cu catalysts supported on nitrogen-doped carbon derived from peanut shells exhibited superior catalytic performance in the oxidative carbonylation of ethanol. The high surface Cu-0 and Cu+ concentration played a key role in accelerating the activation of ethanol molecules and promoting the insertion of CO.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Multidisciplinary
Wahyu S. Putro, Yusuke Munakata, Seiichiro Ijima, Shinji Shigeyasu, Satoshi Hamura, Seiji Matsumoto, Takayoshi Mishima, Keiichi Tomishige, Jun-Chul Choi, Norihisa Fukaya
Summary: The combination of CeO2 catalyst and ethanol effectively promotes the direct synthesis of diethyl carbonate from CO2 and an orthoester. Optimized conditions yield high productivity, with orthoesters bearing longer alkyl substituents leading to higher DEC yields in the presence of ethanol. Aromatic and halide moieties in orthoesters negatively impact DEC formation.
JOURNAL OF CO2 UTILIZATION
(2022)
Article
Chemistry, Physical
Marco Buchmann, Martin Lucas, Marcus Rose
Summary: The direct conversion of (bio)ethanol and CO2 to diethyl carbonate (DEC) is a promising route due to the low cost and renewable nature of the reactants. By using urea as a precipitation agent, the optimal catalytic activity of pure ceria for DEC formation is achieved through a balance of surface acidity and basicity with a high specific surface area. Temperature-programmed desorption experiments indicate that weak basic sites play a key role in the DEC formation process.
CATALYSIS SCIENCE & TECHNOLOGY
(2021)
Article
Thermodynamics
Claire M. Gregoire, Sean P. Cooper, Maryam Khan-Ghauri, Sulaiman A. Alturaifi, Eric L. Petersen, Olivier Mathieu
Summary: The pyrolysis of three linear carbonates, namely dimethyl carbonate (DMC), diethyl carbonate (DEC), and ethyl methyl carbonate (EMC), was investigated using a CO spectroscopic laser diagnostic. The experiments were conducted in reflected shock waves with varying temperatures and near atmospheric pressure. A new detailed chemical kinetics pyrolysis mechanism encompassing all three linear carbonates was developed, and it accurately reproduced the results for DMC and DEC. However, predicting CO formation for EMC remains challenging due to the poor methanol pyrolysis chemistry displayed by modern detailed kinetics mechanisms.
COMBUSTION AND FLAME
(2023)
Article
Chemistry, Physical
Jiajun Wang, Tingjun Fu, Fanhui Meng, Dan Zhao, Steven S. . C. Chuang, Zhong Li
Summary: A micropore-rich mesoporous carbon (MMC) derived from ordered mesoporous carbon (OMC) is used as a support to prepare a highly active nano Cu2O catalyst for methanol oxidation carbonylation. The well-dispersed Cu nanoparticles with high purity of Cu2O are obtained, leading to significantly enhanced performance in terms of space-time yield and turnover frequency of DMC. The introduction of plentiful under-coordinated carbon atoms in the micropores plays a key role in immobilizing Cu precursors and accelerating the auto-reduction of CuO to form high-purity Cu2O, thereby enhancing the intrinsic activity of the catalyst.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2022)
Article
Chemistry, Multidisciplinary
Hye Jin Lee, Thanh Tung Nguyen, Anh Vy Tran, Hoon Sik Kim, Young-Woong Suh, Jayeon Baek, Yong Jin Kim
Summary: C1 chemistry is crucial in the chemical and energy industry, particularly in terms of recycling C1 molecules and achieving high productivity. The oxidative carbonylation of alcohols to dialkyl carbonates (DACs) has been studied, but catalysts still suffer from issues such as corrosion and low yields. In this study, various Se/Ph2Se2/tertiary amine catalytic systems were explored, and Se/Ph2Se2/DMAP showed superior catalytic activity, with a yield of 60.9% for bis(2-methoxyethyl) carbonate (BMEC) and a turnover frequency (TOF) value of 32.5 h-1. Furthermore, the oxidative carbonylation of C1-C4 n-alcohols yielded over 40% of DACs with high TOF values (over 40 h-1), which is unprecedented compared to previous reports. The study also uncovered a relationship between hydrogen bond strength and catalytic performance, as well as a volcano-type correlation with the pKa of the tertiary amine (TA) catalyst.
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Yu-Cong Song, Xiao-Shu Ding, Chang-Cheng Wu, Yan-Ji Wang
Summary: Choosing a synthetic route is a crucial issue for the development of the chemical industry. In this study, a complex parameter called three-parameter difference was used to comprehensively evaluate the thermodynamic feasibility, greenness, and safety of chemical reactions. The parameter was corrected to make it more universal, and it was successfully used to evaluate the synthesis of dimethyl carbonate and toluene diisocyanate. The results showed promising reaction pathways with significant advantages and future research prospects. This indicates the reliability of the three-parameter difference, providing a theoretical basis and practical guidance for designing and evaluating new synthesis routes.
Article
Engineering, Chemical
Chengwei Liu, Ziyi Chi, Yong Yan, Zhenyang Lu, Xue-Gang Li, Jian-Min Yan, Man Luo, Wende Xiao
Summary: This study investigates the tunable transesterification of dimethyl carbonate (DMC) with ethanol to synthesize ethyl methyl carbonate (EMC) and diethyl carbonate (DEC) using a solid alkaline catalyst. The catalyst displayed high activity for the reaction, with the selectivities of EMC and DEC being tunable by adjusting the space velocity and feed ratio. The findings contribute to the development of co-solvents for electrolytes in lithium-ion batteries.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2023)
Article
Chemistry, Multidisciplinary
Qing Wang, Siyu Wan, Rui Xia, Yuxin Wang, Dan Wang, Jinbing Wen, Xinyang Xiong, Jun Zhou, Lei Shi
Summary: A series of catalysts with different base strengths were studied for the transesterification of DMO and EtOH. It was found that sodium tert-butoxide exhibited a high TOF value at room temperature. The introduction of pK(b) value established the relationship between base strength and catalytic efficiency. Furthermore, the reaction kinetics and mechanism were well studied, and the transesterification results of different raw materials were consistent with the deduced mechanism.
NEW JOURNAL OF CHEMISTRY
(2023)
Article
Chemistry, Physical
Yichang Liu, Yi-Hung Chen, Hong Yi, Aiwen Lei
Summary: Carbonyl derivatives are widely present in pharmaceuticals, agricultural chemicals, materials, and natural products. Developing novel, efficient, and green carbonylation methods is one of the hottest research topics in organic synthesis. C-H functionalization/carbonylation is among the most atom- and step-economical methods.
Article
Energy & Fuels
Kyu Min Lee, Jun Ho Jang, Mani Balamurugan, Jeong Eun Kim, Young In Jo, Ki Tae Nam
Summary: Electrochemical reduction of CO2 to produce fuel precursors and additives has traditionally been limited in product variety and overall efficiency. A recent study successfully utilized redox-neutral reactions to convert CO2 into dimethyl carbonate in methanol with high Faradaic efficiency, and expanded to diethyl carbonate. This approach shows promise in broadening the scope of products and improving efficiency through innovative design strategies.
Article
Chemistry, Multidisciplinary
Yu-Fen Bao, Yi-Jie Wang, Yu-Chen Wang, Ding-Hua Liu
Summary: By studying the influence of ionic liquid base strength, we successfully synthesized a potassium imidazole (KIm) organic base catalyst with high catalytic activity and stability, solving the issue of catalyst deactivation in transesterification. The results showed that KIm performed better than most previously reported catalysts, achieving chemical equilibrium within 3 minutes and yielding 73.03% dimethyl carbonate (DMC) in the synthesis from propylene carbonate (PC) and methanol (MeOH). Moreover, the catalyst maintained its activity after ten reaction cycles, meeting the requirements for industrial production.
Review
Chemistry, Multidisciplinary
Giulia Fiorani, Alvise Perosa, Maurizio Selva
Summary: This review provides a comprehensive analysis of the reactions and applications of various organic carbonates and enol esters for the functionalization and upgrading of renewable compounds. Five sections cover the synthetic methods of organic carbonates, their reactions as alkylating, carboxylating, and acylating agents, and their use as solvents. The review also discusses the pros and cons of different methods and suggests areas for future research and analysis.
Article
Chemistry, Applied
Lin Xu, Yantao Hu, Muhammad Asif Nawaz, Xiangjun Li, Dianhua Liu
Summary: Ethanol carbonylation is a potential route for propionic acid production, hindered by low space-time yield. By using specific diphosphine ligands, the reaction rate and space-time yield of propionic acid can be significantly improved. Factors affecting catalytic efficiency were studied, resulting in higher yields under optimal conditions.
FUEL PROCESSING TECHNOLOGY
(2021)
Article
Chemistry, Applied
Zhou Ren, Yang Liu, Yuan Lyu, Xiangen Song, Changyong Zheng, Zheng Jiang, Yunjie Ding
Summary: The Rh-TPISP catalyst, with [Rh(CO)I-3](2-) as the active center, exhibited superior activity and selectivity for heterogeneous ethanol carbonylation compared to traditional catalytic systems. The more electron-rich Rh center and the formation of two ionic bonds between [Rh(CO)I-3](2-) and the cationic P(V) framework were suggested to be crucial for the enhanced performance of Rh-TPISP.
CHINESE JOURNAL OF CATALYSIS
(2021)
Article
Engineering, Aerospace
Hongji Zhuang, Dongming Ding, Hao Chen, Guangxing Li, Hui Chen, Bin Zhang
Summary: This study completes the simulation of a missile's lateral jet flowfield in a rarefied high-altitude atmosphere, and investigates the influence of various factors on control performance. The results show that the gain effect of lateral jet interaction decreases with increasing angle of sideslip, jet pressure ratio, and jet Mach number, while the normal force coefficient of the missile increases with higher jet pressure ratio and jet Mach number.
JOURNAL OF SPACECRAFT AND ROCKETS
(2022)
Article
Astronomy & Astrophysics
Yan Gong, Shu Liu, Junzhi Wang, Weishan Zhu, Guang-Xing Li, Wenjin Yang, Jixian Sun
Summary: Through large-scale mapping observations, we discovered that the Oph N1 molecular cloud exhibits widespread subsonic turbulence and a steep relation between size and linewidth. The cloud is magnetized and primarily supported against gravity by the magnetic field.
ASTRONOMY & ASTROPHYSICS
(2022)
Article
Astronomy & Astrophysics
Yue Cao, Keping Qiu, Qizhou Zhang, Guang-Xing Li
Summary: The DR21(OH) ridge, a center of high-mass star and cluster formation, consists of three nearly parallel fibers (f1, f2, and f3). These fibers are mildly supersonic and entangle in the south where high-mass star formation is most active. The f1 fiber exhibits high-mass star formation along its entire length, while f2 and f3 show no significant star formation in their northern parts. The ridge undergoes global collapse, and the inefficiency of star formation in f2 and f3 may be due to the disruptive effects of tidal forces.
ASTROPHYSICAL JOURNAL
(2022)
Article
Astronomy & Astrophysics
Guang-Xing Li
Summary: In this article, a new and efficient multiscale method is proposed for decomposing maps or signals into component maps with different size structures. By solving a modified nonlinear diffusion equation, the decomposition is achieved and the issue of artifacts is addressed. Particularly suitable for signals with localized nonlinear features, this method can be used to study the multiscale structures of astronomical maps.
ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES
(2022)
Article
Astronomy & Astrophysics
Xing Lu, Guang-Xing Li, Qizhou Zhang, Yuxin Lin
Summary: A massive and stable Keplerian disk with two embedded spirals has been discovered around a 32 solar mass protostar in the Sagittarius C cloud near the Galactic Centre. Analysis suggests that the spirals are most likely formed by external perturbations from a close flyby. This finding indicates that the formation of massive O-type stars may involve both disk-mediated accretion and flyby-impacted disk evolution, similar to the formation process of low-mass stars.
Article
Astronomy & Astrophysics
Guang-Xing Li, Bing-Qiu Chen
Summary: Recent studies have found that part of the Gould Belt belongs to a thin, continuous wave composed of a chain of clouds. By studying the motion of young stellar objects within these clouds, researchers have identified a damped undulation pattern in both spatial arrangement and velocity. The undulation is believed to originate from external perturbations.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Astronomy & Astrophysics
Guang-Xing Li, Ji-Xuan Zhou
Summary: This study develops a new method to generate maps of a generalized density exponent for complex density distributions. The analysis of a high fidelity map of the Perseus molecular cloud reveals a surprisingly wide range of variation in the density exponent, with regions at later stages of gravitational collapse exhibiting steeper density profiles. This research provides insights into the diverse density structures and the steepening of density profiles due to gravitational collapse.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Astronomy & Astrophysics
Guang-Xing Li, Ji-Xuan Zhou, Bing-Qiu Chen
Summary: This study investigates the evolutionary history of the interstellar medium (ISM) using a sample of young stellar objects (YSOs) associated with molecular cloud complexes (YSO-MC complexes). By combining astrometric measurements and observations, the researchers derive the three-dimensional velocities of the YSO-MC complexes and simulate their motions in the Galactic potential. They uncover the roles of shear and stellar feedback in determining the evolution of the ISM and show that Galactic-scale molecular cloud complexes are stretched into filaments by shear, while stellar feedback injects peculiar velocities into the ISM.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Astronomy & Astrophysics
Lijie Liu, Martin Bureau, Guang-Xing Li, Timothy A. Davis, Dieu D. Nguyen, Fu-Heng Liang, Woorak Choi, Mark R. Smith, Satoru Iguchi
Summary: In this study, we investigate the molecular structures in the dwarf galaxy NGC 404 using high-resolution observations. We find two distinct regions: a gravitationally stable central region and a gravitationally unstable molecular ring. The central region exhibits a steeper size-linewidth relation and larger virial parameters, suggesting more turbulent gas dynamics. In contrast, the molecular ring shows a shallower mass-size relation and larger virial parameters for clumps compared to clouds, indicating different physical mechanisms regulating density structures and dynamics. We propose a collision model to explain the results in the molecular ring, showing that clump-clump collisions driven by gravitational instabilities and galactic shear play a significant role in regulating clump properties and gas turbulence.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Astronomy & Astrophysics
Jihye Hwang, Jongsoo Kim, Kate Pattle, Chang Won Lee, Patrick M. Koch, Doug Johnstone, Kohji Tomisaka, Anthony Whitworth, Ray S. Furuya, Ji-hyun Kang, A-Ran Lyo, Eun Jung Chung, Doris Arzoumanian, Geumsook Park, Woojin Kwon, Shinyoung Kim, Motohide Tamura, Jungmi Kwon, Archana Soam, Ilseung Han, Thiem Hoang, Kyoung Hee Kim, Takashi Onaka, Chakali Eswaraiah, Derek Ward-Thompson, Hong-Li Liu, Xindi Tang, Wen Ping Chen, Masafumi Matsumura, Thuong Duc Hoang, Zhiwei Chen, Valentin J. M. Le Gouellec, Florian Kirchschlager, Frederick Poidevin, Pierre Bastien, Keping Qiu, Tetsuo Hasegawa, Shih-Ping Lai, Do-Young Byun, Jungyeon Cho, Minho Choi, Youngwoo Choi, Yunhee Choi, Il-Gyo Jeong, Miju Kang, Hyosung Kim, Kee-Tae Kim, Jeong-Eun Lee, Sang-Sung Lee, Yong-Hee Lee, Hyeseung Lee, Mi-Ryang Kim, Hyunju Yoo, Hyeong-Sik Yun, Mike Chen, James Di Francesco, Jason Fiege, Laura M. Fissel, Erica Franzmann, Martin Houde, Kevin Lacaille, Brenda Matthews, Sarah Sadavoy, Gerald Moriarty-Schieven, Mehrnoosh Tahani, Tao-Chung Ching, Y. Sophia Dai, Yan Duan, Qilao Gu, Chi-Yan Law, Dalei Li, Di Li, Guangxing Li, Hua-bai Li, Tie Liu, Xing Lu, Lei Qian, Hongchi Wang, Jintai Wu, Jinjin Xie, Jinghua Yuan, Chuan-Peng Zhang, Guoyin Zhang, Yapeng Zhang, Jianjun Zhou, Lei Zhu, David Berry, Per Friberg, Sarah Graves, Junhao Liu, Steve Mairs, Harriet Parsons, Mark Rawlings, Yasuo Doi, Saeko Hayashi, Charles L. H. Hull, Tsuyoshi Inoue, Shu-ichiro Inutsuka, Kazunari Iwasaki, Akimasa Kataoka, Koji Kawabata, Gwanjeong Kim, Masato I. N. Kobayashi, Tetsuya Nagata, Fumitaka Nakamura, Hiroyuki Nakanishi, Tae-Soo Pyo, Hiro Saito, Masumichi Seta, Yoshito Shimajiri, Hiroko Shinnaga, Yusuke Tsukamoto, Tetsuya Zenko, Huei-Ru Vivien Chen, Hao-Yuan Duan, Lapo Fanciullo, Francisca Kemper, Chin-Fei Lee, Sheng-Jun Lin, Sheng-Yuan Liu, Nagayoshi Ohashi, Ramprasad Rao, Ya-Wen Tang, Jia-Wei Wang, Meng-Zhe Yang, Hsi-Wei Yen, Tyler L. Bourke, Antonio Chrysostomou, Victor Debattista, David Eden, Stewart Eyres, Sam Falle, Gary Fuller, Tim Gledhill, Jane Greaves, Matt Griffin, Jennifer Hatchell, Janik Karoly, Jason Kirk, Vera Konyves, Steven Longmore, Sven van Loo, Ilse de Looze, Nicolas Peretto, Felix Priestley, Jonathan Rawlings, Brendan Retter, John Richer, Andrew Rigby, Giorgio Savini, Anna Scaife, Serena Viti, Pham Ngoc Diep, Nguyen Bich Ngoc, Le Ngoc Tram, Philippe Andre, Simon Coude, C. Darren Dowell, Rachel Friesen, Jean-Francois Robitaille
Summary: This study presents and analyzes observations of polarized dust emission in Mon R2. The magnetic field orientations in Mon R2 follow its spiral structure, and the turbulent component of the magnetic field is estimated using a model. The strength and mass-to-flux ratio of the magnetic field are calculated, revealing the importance of the magnetic field in resisting gravitational collapse in Mon R2.
ASTROPHYSICAL JOURNAL
(2022)
Article
Astronomy & Astrophysics
Tao-Chung Ching, Keping Qiu, Di Li, Zhiyuan Ren, Shih-Ping Lai, David Berry, Kate Pattle, Ray Furuya, Derek Ward-Thompson, Doug Johnstone, Patrick M. Koch, Chang Won Lee, Thiem Hoang, Tetsuo Hasegawa, Woojin Kwon, Pierre Bastien, Chakali Eswaraiah, Jia-Wei Wang, Kyoung Hee Kim, Jihye Hwang, Archana Soam, A-Ran Lyo, Junhao Liu, Valentin J. M. Le Gouellec, Doris Arzoumanian, Anthony Whitworth, James Di Francesco, Frederick Poidevin, Tie Liu, Simon Coude, Mehrnoosh Tahani, Hong-Li Liu, Takashi Onaka, Dalei Li, Motohide Tamura, Zhiwei Chen, Xindi Tang, Florian Kirchschlager, Tyler L. Bourke, Do-Young Byun, Mike Chen, Huei-Ru Vivien Chen, Wen Ping Chen, Jungyeon Cho, Yunhee Choi, Youngwoo Choi, Minho Choi, Antonio Chrysostomou, Eun Jung Chung, Y. Sophia Dai, Pham Ngoc Diep, Yasuo Doi, Yan Duan, Hao-Yuan Duan, David Eden, Lapo Fanciullo, Jason Fiege, Laura M. Fissel, Erica Franzmann, Per Friberg, Rachel Friesen, Gary Fuller, Tim Gledhill, Sarah Graves, Jane Greaves, Matt Griffin, Qilao Gu, Ilseung Han, Saeko Hayashi, Martin Houde, Charles L. H. Hull, Tsuyoshi Inoue, Shu-ichiro Inutsuka, Kazunari Iwasaki, Il-Gyo Jeong, Vera Konyves, Ji-hyun Kang, Miju Kang, Janik Karoly, Akimasa Kataoka, Koji Kawabata, Francisca Kemper, Jongsoo Kim, Mi-Ryang Kim, Shinyoung Kim, Hyosung Kim, Kee-Tae Kim, Gwanjeong Kim, Jason Kirk, Masato I. N. Kobayashi, Takayoshi Kusune, Jungmi Kwon, Kevin Lacaille, Chi-Yan Law, Sang-Sung Lee, Hyeseung Lee, Jeong-Eun Lee, Chin-Fei Lee, Yong-Hee Lee, Guangxing Li, Hua-bai Li, Sheng-Jun Lin, Sheng-Yuan Liu, Xing Lu, Steve Mairs, Masafumi Matsumura, Brenda Matthews, Gerald Moriarty-Schieven, Tetsuya Nagata, Fumitaka Nakamura, Hiroyuki Nakanishi, Nguyen Bich Ngoc, Nagayoshi Ohashi, Geumsook Park, Harriet Parsons, Nicolas Peretto, Felix Priestley, Tae-Soo Pyo, Lei Qian, Ramprasad Rao, Mark Rawlings, Jonathan Rawlings, Brendan Retter, John Richer, Andrew Rigby, Sarah Sadavoy, Hiro Saito, Giorgio Savini, Masumichi Seta, Yoshito Shimajiri, Hiroko Shinnaga, Ya-Wen Tang, Kohji Tomisaka, Le Ngoc Tram, Yusuke Tsukamoto, Serena Viti, Hongchi Wang, Jintai Wu, Jinjin Xie, Meng-Zhe Yang, Hsi-Wei Yen, Hyunju Yoo, Jinghua Yuan, Hyeong-Sik Yun, Tetsuya Zenko, Chuan-Peng Zhang, Yapeng Zhang, Guoyin Zhang, Jianjun Zhou, Lei Zhu, Ilse de Looze, Philippe Andre, C. Darren Dowell, Stewart Eyres, Sam Falle, Jean-Francois Robitaille, Sven van Loo
Summary: We present dust polarization observations of the DR21 filament and find smooth variations in the magnetic field structures from the main filament to the subfilaments. Our study suggests that magnetic fields play an important role in shaping the DR21 filament.
ASTROPHYSICAL JOURNAL
(2022)
Article
Astronomy & Astrophysics
Rui-zhi Yang, Guang-Xing Li, Emma de Ona Wilhelmi, Yu-Dong Cui, Bing Liu, Felix Aharonian
Summary: The density of cosmic rays inside molecular clouds affects the ionization rate in dense cores and the creation of complex molecules. Observations of giant molecular clouds with the Fermi Large Area Telescope revealed deficits in the gamma-ray residual map due to the lack of penetration of low-energy cosmic rays into denser regions. This challenges the prevailing view of fast cosmic ray transport and highlights the importance of slow diffusion inside dense molecular clumps for star formation and astrochemistry.
Article
Astronomy & Astrophysics
Derek Ward-Thompson, Janik Karoly, Kate Pattle, Anthony Whitworth., Jason Kirk., David. Berry, Pierre Bastien, Tao-Chung Ching, Simon Coude, Jihye Hwang, Woojin Kwon, Archana Soam, Jia-Wei Wang, Tetsuo Hasegawa, Shih-Ping Lai, Keping Qiu, Doris Arzoumanian, Tyler L. Bourke, Do-Young Byun, Huei-Ru Vivien Chen, Wen Ping Chen, Mike Chen, Zhiwei Chen, Jungyeon Cho, Minho Choi, Youngwoo Choi, Yunhee Choi, Antonio Chrysostomou, Eun Jung Chung, Sophia Dai, Victor Debattista, James Di Francesco, Pham Ngoc Diep, Yasuo Doi, Hao-Yuan Duan, Yan Duan, Chakali Eswaraiah, Lapo Fanciullo, Jason Fiege, Laura M. Fissel, Erica Franzmann, Per Friberg, Rachel Friesen, Gary Fuller, Ray Furuya, Tim Gledhill, Sarah Graves, Jane Greaves, Matt Griffin, Qilao Gu, Ilseung Han, Saeko Hayashi, Thiem Hoang, Martin Houde, Charles L. H. Hull, Tsuyoshi Inoue, Shu-ichiro Inutsuka, Kazunari Iwasaki, Il-Gyo Jeong, Doug Johnstone, Vera Koenyves, Ji-hyun Kang, Miju Kang, Akimasa Kataoka, Koji Kawabata, Francisca Kemper, Jongsoo Kim, Shinyoung Kim, Gwanjeong Kim, Kyoung Hee Kim, Mi-Ryang Kim, Kee-Tae Kim, Hyosung Kim, Florian Kirchschlager, Masato I. N. Kobayashi, Patrick M. Koch, Takayoshi Kusune, Jungmi Kwon, Kevin Lacaille, Chi-Yan Law, Chang Won Lee, Hyeseung Lee, Yong-Hee Lee, Chin-Fei Lee, Jeong-Eun Lee, Sang-Sung Lee, Di Li, Di Li, Guangxing Li, Hua-bai Li, Sheng-Jun Lin, Hong-Li Liu, Tie Liu, Sheng-Yuan Liu, Junhao Liu, Steven Longmore, Xing Lu, A-Ran Lyo, Steve Mairs, Masafumi Matsumura, Brenda Matthews, Gerald Moriarty-Schieven, Tetsuya Nagata, Fumitaka Nakamura, Hiroyuki Nakanishi, Nguyen Bich Ngoc, Nagayoshi Ohashi, Takashi Onaka, Geumsook Park, Harriet Parsons, Nicolas Peretto, Felix Priestley, Tae-Soo Pyo, Lei Qian, Ramprasad Rao, Jonathan Rawlings, Mark Rawlings, Brendan Retter, John Richer, Andrew Rigby, Sarah Sadavoy, Hiro Saito, Giorgio Savini, Masumichi Seta, Yoshito Shimajiri, Hiroko Shinnaga, Mehrnoosh Tahani, Motohide Tamura, Ya-Wen Tang, Xindi Tang, Kohji Tomisaka, Le Ngoc Tram, Yusuke Tsukamoto, Serena Viti, Hongchi Wang, Jintai Wu, Jinjin Xie, Meng-Zhe Yang, Hsi-Wei Yen, Hyunju Yoo, Jinghua Yuan, Hyeong-Sik Yun, Tetsuya Zenko, Guoyin Zhang, Yapeng Zhang, Chuan-Peng Zhang, Jianjun Zhou, Lei Zhu, Ilse de Looze, Philippe Andre, C. Darren Dowell, David Eden, Stewart Eyres, Sam Falle, Valentin J. M. Le Gouellec, Frederick Poidevin, Jean-Francois Robitaille, Sven van Loo
Summary: We conducted BISTRO Survey observations of the L1495A-B10 region in the Taurus molecular cloud and found a triangular network of dense filaments. Within these filaments, we identified nine starless cores in polarization, and observed that the core-scale magnetic field orientation is nearly perpendicular to the filaments. Furthermore, we discovered a transitional stage in early prestellar evolution and observed the sheet-like structure and its fragmentation into filaments, providing valuable insights into the transition from field-dominated to matter-dominated evolution.
ASTROPHYSICAL JOURNAL
(2023)
Article
Astronomy & Astrophysics
Feng-Wei Xu, Ke Wang, Tie Liu, Paul F. Goldsmith, Qizhou Zhang, Mika Juvela, Hong-Li Liu, Sheng-Li Qin, Guang-Xing Li, Anandmayee Tej, Guido Garay, Leonardo Bronfman, Shanghuo Li, Yue-Fang Wu, Gilberto C. Gomez, Enrique Vazquez-Semadeni, Ken'ichi Tatematsu, Zhiyuan Ren, Yong Zhang, L. Viktor Toth, Xunchuan Liu, Nannan Yue, Siju Zhang, Tapas Baug, Namitha Issac, Amelia M. Stutz, Meizhu Liu, Gary A. Fuller, Mengyao Tang, Chao Zhang, Lokesh Dewangan, Chang Won Lee, Jianwen Zhou, Jinjin Xie, Wenyu Jiao, Chao Wang, Rong Liu, Qiuyi Luo, Archana Soam, Chakali Eswaraiah
Summary: In this study, ALMA Band-3/7 observations were conducted on the massive hub-filament system SDC335 to study its fragmentation and accretion processes. The observations revealed two massive dense cores, MM1 and MM2, along with their fragmentation and temperature estimation. Gas motion analysis showed the presence of four major gas streams connected to large-scale filaments, supporting continuous accretion and core feeding. The comprehensive study of SDC335 provides valuable insights into the gas kinematics of massive infalling clumps and calls for further systematic studies.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Article
Anthropology
Jianxin Guo, Weitao Wang, Kai Zhao, Guangxing Li, Guanglin He, Jing Zhao, Xiaomin Yang, Jinwen Chen, Kongyang Zhu, Rui Wang, Hao Ma, Bingying Xu, Chuan-Chao Wang
Summary: This study focuses on detecting the demographic history and early farming-related migration in the crossroad area between East Asia and Southeast Asia. The findings reveal population substructure within Tibeto-Burman populations, with northern groups showing a genetic legacy associated with millet farming from North China and southern groups showing a genetic legacy associated with rice farming. There is a strong genetic affinity between Austroasiatic populations in Yunnan and mainland Southeast Asia.
AMERICAN JOURNAL OF BIOLOGICAL ANTHROPOLOGY
(2022)
Article
Energy & Fuels
Yingna Du, Chen Huang, Wei Jiang, Qiangwei Yan, Yongfei Li, Gang Chen
Summary: In this study, anionic surfactants modified hydrotalcite was used as a flow improver for crude oil under low-temperature conditions. The modified hydrotalcite showed a significant viscosity reduction effect on crude oil. The mechanism of the modified hydrotalcite on viscosity and pour point of crude oil was explored through characterization and analysis of the modified hydrotalcite and oil samples.
Article
Energy & Fuels
Mohammad Saeid Rostami, Mohammad Mehdi Khodaei
Summary: In this study, a hybrid structure, MIL-53(Al)@MWCNT, was synthesized by combining MIL-53(Al) particles and -COOH functionalized multi-walled carbon nanotube (MWCNT). The hybrid structure was then embedded in a polyethersulfone (PES) polymer matrix to prepare a mixed matrix membrane (MMM) for CO2/CH4 and CO2/N2 separation. The addition of MWCNTs prevented MIL-53(Al) aggregation, improved membrane mechanical properties, and enhanced gas separation efficiency.
Article
Energy & Fuels
Yunlong Li, Desheng Huang, Xiaomeng Dong, Daoyong Yang
Summary: This study develops theoretical and experimental techniques to determine the phase behavior and physical properties of DME/flue gas/water/heavy oil systems. Eight constant composition expansion (CCE) tests are conducted to obtain new experimental data. A thermodynamic model is used to accurately predict saturation pressure and swelling factors, as well as the phase boundaries of N2/heavy oil systems and DME/CO2/heavy oil systems, with high accuracy.
Article
Energy & Fuels
Morteza Afkhamipour, Ebad Seifi, Arash Esmaeili, Mohammad Shamsi, Tohid N. Borhani
Summary: Non-conventional amines are being researched worldwide to overcome the limitations of traditional amines like MEA and MDEA. Adequate process and thermodynamic models are crucial for understanding the applicability and performance of these amines in CO2 absorption, but studies on process modeling for these amines are limited. This study used rate-based modeling and Deshmukh-Mather method to model CO2 absorption by DETA solution in a packed column, validated the model with experimental data, and conducted a sensitivity analysis of mass transfer correlations. The study also compared the CO2 absorption efficiency of DETA solution with an ionic solvent [bmim]-[PF6] and highlighted the importance of finding optimum operational parameters for maximum absorption efficiency.
Article
Energy & Fuels
Arastoo Abdi, Mohamad Awarke, M. Reza Malayeri, Masoud Riazi
Summary: The utilization of smart water in EOR operations has gained attention, but more research is needed to understand the complex mechanisms involved. This study investigated the interfacial tension between smart water and crude oil, considering factors such as salt, pH, asphaltene type, and aged smart water. The results revealed that the hydration of ions in smart water plays a key role in its efficacy, with acidic and basic asphaltene acting as intrinsic surfactants. The pH also influenced the interfacial tension, and the aged smart water's interaction with crude oil depended on asphaltene type, salt, and salinity.
Article
Energy & Fuels
Dongao Zhu, Kun Zhu, Lixian Xu, Haiyan Huang, Jing He, Wenshuai Zhu, Huaming Li, Wei Jiang
Summary: In this study, cobalt-based metal-organic frameworks (Co-based MOFs) were used as supports and co-catalysts to confine the NHPI catalyst, solving the leaching issue. The NHPI@Co-MOF with carboxyl groups exhibited stronger acidity and facilitated the generation of active oxygen radicals O2•, resulting in enhanced catalytic activity. This research provides valuable insights into the selection of suitable organic linkers and broadens the research horizon of MOF hybrids in efficient oxidative desulfurization (ODS) applications.
Article
Energy & Fuels
Edwin G. Hoyos, Gloria Amo-Duodu, U. Gulsum Kiral, Laura Vargas-Estrada, Raquel Lebrero, Rail Munoz
Summary: This study investigated the impact of carbon-coated zero-valent nanoparticle concentration on photosynthetic biogas upgrading. The addition of nanoparticles significantly increased microalgae productivity and enhanced nitrogen and phosphorus assimilation. The presence of nanoparticles also improved the quality of biomethane produced.
Article
Energy & Fuels
Yao Xiao, Asma Leghari, Linfeng Liu, Fangchao Yu, Ming Gao, Lu Ding, Yu Yang, Xueli Chen, Xiaoyu Yan, Fuchen Wang
Summary: Iron is added as a flocculant in wastewater treatment and the hydrothermal carbonization (HTC) of sludge produces wastewater containing Fe. This study investigates the effect of aqueous phase (AP) recycling on hydrochar properties, iron evolution and environmental assessment during HTC of sludge. The results show that AP recycling process improves the dewatering performance of hydrochar and facilitates the recovery of Fe from the liquid phase.
Article
Energy & Fuels
He Liang, Tao Wang, Zhenmin Luo, Jianliang Yu, Weizhai Yi, Fangming Cheng, Jingyu Zhao, Xingqing Yan, Jun Deng, Jihao Shi
Summary: This study investigated the influence of inhibitors (carbon dioxide, nitrogen, and heptafluoropropane) on the lower flammability limit of hydrogen and determined the critical inhibitory concentration needed for complete suppression. The impact of inhibitors on explosive characteristics was evaluated, and the inhibitory mechanism was analyzed with chemical kinetics. The results showed that with the increase of inhibitor quantity, the lower flammability limit of hydrogen also increased. The research findings can contribute to the safe utilization of hydrogen energy.
Article
Energy & Fuels
Zonghui Liu, Zhongze Zhang, Yali Zhou, Ziling Wang, Mingyang Du, Zhe Wen, Bing Yan, Qingxiang Ma, Na Liu, Bing Xue
Summary: In this study, high-performance solid catalysts based on phosphotungstic acid (HPW) supported on Zr-SBA-15 were synthesized and evaluated for the one-pot conversion of furfural (FUR) to γ-valerolactone (GVL). The catalysts were characterized using various techniques, and the ratio of HPW and Zr was found to significantly affect the selectivity of GVL. The HPW/Zr-SBA-15 (2-4-15) catalyst exhibited the highest GVL yield (83%) under optimized reaction conditions, and it was determined that a balance between Bronsted acid sites (BAS) and Lewis acid sites (LAS) was crucial for achieving higher catalytic performance. The reaction parameters and catalyst stability were also investigated.
Article
Energy & Fuels
Michael Stoehr, Stephan Ruoff, Bastian Rauch, Wolfgang Meier, Patrick Le Clercq
Summary: As part of the global energy transition, an experimental study was conducted to understand the effects of different fuel properties on droplet vaporization for various conventional and alternative fuels. The study utilized a flow channel to measure the evolution of droplet diameters over time and distance. The results revealed the temperature-dependent effects of physical properties, such as boiling point, liquid density, and enthalpy of vaporization, and showed the complex interactions of preferential vaporization and temperature-dependent influences of physical properties for multi-component fuels.
Article
Energy & Fuels
Yuan Zhuang, Ruikang Wu, Xinyan Wang, Rui Zhai, Changyong Gao
Summary: Through experimental validation and optimization of the chemical kinetic model, it was found that methanol can accelerate the oxidation reaction of ammonia, and methanol can be rapidly oxidized at high concentration. HO2 was found to generate a significant amount of OH radicals, facilitating the oxidation of methanol and ammonia. Rating: 7.5/10.
Article
Energy & Fuels
Radwan M. EL-Zohairy, Ahmed S. Attia, A. S. Huzayyin, Ahmed I. EL-Seesy
Summary: This paper presents a lab-scale experimental study on the impact of diethyl ether (DEE) as an additive to waste cooking oil biodiesel with Jet A-1 on combustion and emission features of a swirl-stabilized premixed flame. The addition of DEE to biodiesel significantly affects the flame temperature distribution and emissions. The W20D20 blend of DEE, biodiesel, and Jet A-1 shows similar flame temperature distribution to Jet A-1 and significantly reduces UHC, CO, and NOx emissions compared to Jet A-1.
Article
Energy & Fuels
Jiang Bian, Ziyuan Zhao, Yang Liu, Ran Cheng, Xuerui Zang, Xuewen Cao
Summary: This study presents a novel method for ammonia separation using supersonic flow and develops a mathematical model to investigate the condensation phenomenon. The results demonstrate that the L-P nucleation model accurately characterizes the nucleation process of ammonia at low temperatures. Numerical simulations also show that increasing pressure and concentration can enhance ammonia condensation efficiency.
Article
Energy & Fuels
Shiyuan Pan, Xiaodan Shi, Beibei Dong, Jan Skvaril, Haoran Zhang, Yongtu Liang, Hailong Li
Summary: Integrating CO2 capture with biomass-fired combined heat and power (bio-CHP) plants is a promising method for achieving negative emissions. This study develops a reliable data-driven model based on the Transformer architecture to predict the flowrate and CO2 concentration of flue gas in real time. The model validation shows high prediction accuracy, and the potential impact of meteorological parameters on model accuracy is assessed. The results demonstrate that the Transformer model outperforms other models and using near-infrared spectral data as input features improves the prediction accuracy.
