Article
Engineering, Environmental
Federico Atzori, Francesco Barzagli, Alberto Varone, Giacomo Cao, Alessandro Concas
Summary: It is well known that CO2 capture and re-use is one of the main challenges to tackle global warming. Aqueous ammonia solutions have shown promising potential as sorbents for CO2 capture, offering higher absorption capacity, lower energy requirements, and greater resistance to degradation compared to conventional alkanolamines. This study investigates the chemical absorption of CO2 in aqueous NH3 solutions and proposes a mathematical model to quantify the capture efficiency dynamics and sorbent composition. The results validate the model's effectiveness in designing and optimizing the capture process, considering the effects of temperature and sorbent concentration.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Energy & Fuels
Maria U. Alzueta, Jorge Gimenez-Lopez, Victor D. Mercader, Rafael Bilbao
Summary: This study investigates the oxidation of ammonia and ammonia-nitric oxide mixtures in a CO2 atmosphere from both experimental and kinetic modelling perspectives. The influence of temperature, stoichiometry, gas residence time, and NH3/NO ratio on the reaction is evaluated through parametric studies. Experimental results are interpreted using a literature reaction mechanism.
Article
Energy & Fuels
Maria U. Alzueta, Victor D. Mercader, Jorge Gimenez-Lopez, Rafael Bilbao
Summary: The impact of using CO2 or N2/Ar as bath gas on ammonia oxidation has been evaluated through combined experimental and simulation study. Operating conditions such as temperature and oxygen stoichiometry were carefully controlled. The presence of NO, formed from ammonia oxidation, was also investigated. The results have significant implications for the power and energy industry, particularly in guiding the co-firing of NH3 and carbon containing fuels.
Review
Environmental Sciences
Olajumobi Akeeb, Lei Wang, Weiguo Xie, Richard Davis, Malek Alkasrawi, Sam Toan
Summary: Emissions of carbon dioxide (CO2) from fossil fuel combustion are causing global temperature rise, making the mitigation of CO2 concentration in the atmosphere a priority for environmental protection. This paper compares three main technological categories for CO2 capture and storage, highlighting the advantages and limitations of post-combustion CO2 capture materials. The authors summarize the challenges and opportunities in the development of post-combustion CO2 capture technologies.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2022)
Article
Engineering, Environmental
Ye Wu, Longzhi Zou, Hang Zhu, Jian Mei, Kaixuan Yang, Yuhan Cui, Kun Qian, Yinghui Han, Maohong Fan, Dong Liu
Summary: This study aimed to fabricate a catalyst with good reactivity and stability for catalytic premixed combustion of NH3/C2H4. A Ni lattice-doped Fe2O3 catalyst was found to be cost-effective and environmentally friendly. The catalyst showed higher combustion efficiency than conventional premixed combustion of NH3/C2H4, with reduced CO and NOX emissions and stable performance.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Green & Sustainable Science & Technology
Stylianos Pachitsas, Davide Bonalumi
Summary: The research shows that aqueous mixtures of NH3 and K2CO3 can effectively capture CO2 from industrial flue gases, and the ratio of NH3 and K2CO3 in the solvent affects the capture efficiency. Increasing the regeneration pressure can increase the regeneration temperature and reduce the heat duty of the reboiler.
INTERNATIONAL JOURNAL OF GREENHOUSE GAS CONTROL
(2022)
Article
Environmental Studies
Muhammad Imran, Usman Ali, Ali Hasnain
Summary: This research evaluates the effects of two configurations of intercooled absorber, namely simple and advanced intercoolers, for CO2 capture. The results show that simple and advanced intercooling configurations offer optimum results for maintaining a 90% CO2 capture rate with a decrease in solvent flow rate and specific reboiler duty.
ENERGY & ENVIRONMENT
(2021)
Article
Engineering, Environmental
S. Toufigh Bararpour, Davood Karami, Nader Mahinpey
Summary: This study investigates the impact of textural properties on the capturing performance of mesoporous alumina supported K2CO3. Higher surfactant-to-Al ratios in the supports led to improved capturing performance by enhancing pore size and volume. Additionally, an optimal K2CO3 loading range of 40-50 wt% was found to achieve the best CO2 capture capacity.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Energy & Fuels
Suyang Pan, Jiliang Ma, Xiaoping Chen, Daoyin Liu, Cai Liang
Summary: This study investigated the premixed combustion of ammonia (NH3) and oxygen (O2) in a fluidized bed using both experimental and numerical methods. The results showed that the combustion occurred in a growing bubble, with quenching observed at the bubble edge and instability at low equivalence ratios. The equivalence ratio significantly affected the ignition delay, flame propagation velocity, and the concentrations of gaseous species. Increasing the bed temperature reduced the ignition delay, while nitrogen as the background fluidizing gas had a negative impact on combustion. The combustion of NH3/air in the bubble phase of a fluidized bed was difficult without a catalyst or co-combustion with an inflammable fuel.
Review
Chemistry, Multidisciplinary
Ke Li, Kai Zong, Xiuqin Wang, Guokai Cui, Dongshun Deng
Summary: This review systematically summarizes the utilization of ionic liquids (ILs) and deep eutectic solvents (DESs) for ammonia (NH3) absorption and separation. It discusses different types of green solvents and their influence on absorption performance. The review also provides insights into future research directions and prospects. It is helpful for researchers to gain an overall understanding of ILs and DESs for NH3 capture.
NEW JOURNAL OF CHEMISTRY
(2023)
Article
Engineering, Chemical
Nela Slavu, Adrian Badea, Cristian Dinca
Summary: This study analyzed the use of different concentrations of ammonia in capturing post-combustion CO2 in a coal-fired power station and compared it with the reference MEA case. The results showed that the CO2 capture cost was lowest for the process based on 7% ammonia, and the overall efficiency was optimized for 15% ammonia.
Review
Energy & Fuels
Milad Hosseinpour, Mohammad Javad Shojaei, Mohsen Salimi, Majid Amidpour
Summary: The consumption of fossil fuels leads to significant anthropogenic CO2 emission into the atmosphere, causing climate change and harmful impacts on human life. Carbon capture and storage technologies, particularly absorption-based post-combustion carbon capture (PCC), have emerged as solutions to reduce atmospheric CO2 concentrations. This article reviews the recent research progress on applying machine learning (ML) methods to PCC absorption-based technologies and proposes a roadmap for future research in this area.
Review
Engineering, Environmental
Byoung-Hwa Lee, Yoon-Ho Bae, Si-Hyun Cho, Gyeong-Min Kim, Chung-Hwan Jeon
Summary: This study provides a comprehensive review of the latest research on NH3 co-firing and NOx reduction strategies for coal-fired boilers. It investigates the chemical reactions and NOx mechanisms involved. The study finds that NH3 co-firing tends to increase NOx emissions, but advanced technologies such as air-staged combustion and secondary fuel injection can effectively reduce NOx emissions.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Chemical
Jose-Francisco Perez-Calvo, Daniel Sutter, Matteo Gazzani, Marco Mazzotti
Summary: The work developed advanced process configurations for solvent-based CO2 capture processes using aqueous ammonia as absorbent, optimizing ten different concepts to achieve controlled NH3 emissions, minimize capital costs, and reduce energy demand. The proposed benchmark configuration, based on the Chilled Ammonia Process, allows for specific energy consumption minimization and enhanced flexibility while minimizing chemical and process water consumption.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Review
Green & Sustainable Science & Technology
Zucheng Cheng, Shaohua Li, Yu Liu, Yi Zhang, Zheng Ling, Mingjun Yang, Lanlan Jiang, Yongchen Song
Summary: The review discussed the effects of additives on hydrate formation and proposed future research directions, such as the development of more environmentally friendly thermodynamic additives and process optimization.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2022)
Article
Engineering, Environmental
Changhong Wang, Kaiqi Jiang, Timothy W. Jones, Shenghai Yang, Hai Yu, Paul Feron, Kangkang Li
Summary: The research introduces a novel electrochemical CO2 capture technology that utilizes electrowinning to achieve low energy consumption for CO2 capture and solvent regeneration. This technology shows competitiveness in energy performance and has the potential for practical application.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Engineering, Chemical
Xing Wu, Debra Fernandes, Paul Feron, Mingmei Ding, Hang Xu, Zongli Xie
Summary: The high-performance MXene interlayered FO membrane showed improved permeability and selectivity in different conditions, with higher water fluxes and selectivity in amino acid/salt solutions, as well as stable treatment of saline water solutions.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Article
Food Science & Technology
Yu Wang, Yubiao Zhang, Mingxiao Hou, Wenfeng Han
Summary: This study found that parsley has significant anti-fatigue effects, which can be attributed to its flavonoids. The flavonoids in parsley regulate oxidative stress and exert an anti-fatigue effect by regulating specific pathways. Additionally, the intake of flavonoids stimulates the growth of beneficial microbiota and short chain fatty acid producing bacteria, which are involved in energy metabolism and fatigue regulation.
JOURNAL OF FUNCTIONAL FOODS
(2022)
Article
Chemistry, Inorganic & Nuclear
Xiaolong Wang, Dong Fan, Guojun Lan, Zaizhe Cheng, Xiucheng Sun, Yiyang Qiu, Wenfeng Han, Haodong Tang, Huazhang Liu, Yihan Zhu, Xiaojun Hu, Ying Li
Summary: The study found that the single vacancy sites on the surface of defective carbon form strong chemical bonds with ruthenium chloride and increase the electron density of ruthenium ions. On the other hand, the deactivation rate of ruthenium catalysts in acetylene hydrochlorination is closely related to their acidity and coke deposition. Research suggests that defective carbon supported ruthenium catalysts exhibit high catalytic activity and stability.
INORGANIC CHEMISTRY FRONTIERS
(2022)
Article
Fisheries
Jian Liu, Yunfei Sun, Wenfeng Han, Jinghao Li, Shihui Wang, Zhigang Yang, Yongxu Cheng
Summary: This study evaluated the effects of microecological preparation on the growth of Cladophora. The results showed that microecological preparation could inhibit the growth of Cladophora, with EM bacteria having the most significant effect.
AQUACULTURE INTERNATIONAL
(2022)
Article
Engineering, Environmental
Xiaoli Wei, Zhongsheng Jia, Chuanzhao Wang, Houlin Yu, Sen Wu, Bing Liu, Wenfeng Han, Chunshan Lu
Summary: This study successfully developed a highly efficient Lewis acid catalyst through the method of carbon-confined AlF3 clusters, which exhibit outstanding sintering resistance and abundant acid sites.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Engineering, Chemical
Yebin Zhou, Ling Li, Yi Liu, Hongzheng Wang, Zhenlong Feng, Feng Feng, Qunfeng Zhang, Wucan Liu, Wenfeng Han, Chunshan Lu, Xiaonian Li
Summary: In this study, an acid resistant and strawberry-like metal-carbon sphere was synthesized as a robust hydrogenation catalyst. The catalyst showed improved acid resistance and stability compared to traditional commercial catalysts, and exhibited excellent catalytic performance in the hydrogenation reactions.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2022)
Article
Materials Science, Multidisciplinary
Stefan J. D. Smith, Colin D. Wood, Paul H. M. Feron, Hamidreza Mahdavi, Roger J. Mulder, Cara M. Doherty, Matthew R. Hill, Xavier Mulet
Summary: Combining desired material properties into a single material for gas separations in industry remains a challenge. In this study, a family of polymer liquids inspired by hyper-crosslinked polymers (HCPs) was reported, which showed good volumetric capacity, improved selectivity, and efficient regeneration. The liquids also had low heat of adsorption and specific heat capacity, indicating favorable process thermodynamics.
SCIENCE CHINA-MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Chaofan Ma, Yebin Zhou, Wei Yan, Wei He, Qiangqiang Liu, Zhen Li, Hongzheng Wang, Guowei Li, Yuanyuan Yang, Wenfeng Han, Chunshan Lu, Xiaonian Li
Summary: A novel porous carbon-metal composite was fabricated using nitrogen-doped carbon quantum dots and nickel. The resulting carbon nanosheet embedded with metal nanoparticles showed excellent catalytic activity and selectivity, suggesting its potential as a replacement for industrial catalysts.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2022)
Article
Chemistry, Physical
Ruiqin Gao, Bo Hu, Zhenxing Fang, Meng Deng, Yuxue Wu, Qing Yan, Weiyong Yuan, Dehong Chen, Wenfeng Han, Zhengfei Chen
Summary: Surface reconstruction is a promising method to obtain highly efficient electrocatalysts for the oxygen evolution reaction (OER). In this study, Co-Fe based difluoride was synthesized through a simple solvothermal treatment process with the assistance of an ionic liquid. The resulting Co0.67Fe0.33F2 sample exhibited the highest electrocatalytic activity, generating a current density of 10 mA/cm(2) at an overpotential of 270 mV. The appropriate amount of iron dopant increased the number of active sites, and the in-situ leaching of fluorine during OER led to the formation of a metal oxyhydroxide layer with abundant oxygen vacancies, contributing to the high performance of the electrocatalysts.
CATALYSIS COMMUNICATIONS
(2022)
Article
Chemistry, Physical
Wujian Zhang, Zhiling Huang, Hui Shen, Zhenhai Gu, Shengjie Xia, Panpan Zhang, Wenfeng Han, Ying Li, Haodong Tang
Summary: The spatial loading of redox cocatalysts on different faces of semiconductor single crystals is an effective approach to construct efficient photocatalysts. This study selectively deposited Pt nanoparticles on the electron-rich (001) face of LaOCl catalyst and demonstrated higher photocatalytic activity compared to random deposition on the entire surface. The addition of persulfate further improved the photodegradation performance.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2022)
Article
Chemistry, Physical
Xiaoli Wei, Yifan Wei, Jiaqin Lu, Yunfan Huang, Yiwei Sun, Yu Wang, Lijia Liu, Bing Liu, Wenfeng Han
Summary: A nonmetallic catalyst SiC was fabricated by sequentially mechanochemical treatment and fluorination, which formed thin layers of graphite, COOH species, SiO2, and Si4C4-xO2 on the super surface of SiC. The layers of graphite, COOH species, and partial SiO2 could be removed via mechanochemical treatment, and the exposed SiO2 residue could be removed by fluorination, forming volatile SiF4. Simultaneously, the transition layer, Si4C4-xO2, was fluorinated to Si4C4-xF2, accompanied by enhanced Lewis acidity. The treated SiC showed significantly improved activity compared to the unmilled SiC, providing a feasible way to enhance the catalytic performance of nonmetallic catalysts for dehydrofluorination.
MOLECULAR CATALYSIS
(2023)
Article
Engineering, Environmental
Wujian Zhang, Yue Meng, Yuhua Liu, Hui Shen, Zheming Ni, Shengjie Xia, Wenfeng Han, Ying Li, Haodong Tang
Summary: In this study, a LaOCl/LDH Z-scheme heterojunction catalyst containing oxygen vacancies was successfully constructed for efficient photodegradation of norfloxacin. The formation of Z-scheme heterojunction enhanced the separation and transfer of photogenerated carriers, and improved the redox capacity of the photocatalyst. Additionally, LC-MS analysis provided insights into the intermediates and possible pathway for the degradation of norfloxacin.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Engineering, Environmental
Lichun Li, Xiaoli Wei, Shenglan Zhou, Zhongsheng Jia, Chuanzhao Wang, Houlin Yu, Sen Wu, Ying Li, Wenfeng Han
Summary: Dehydrochlorination reaction can transform high-global-warming-potential hydrochlorofluorocarbons (HCFCs) into low-global-warming-potential hydrofluoroolefins (HFOs). A one-pot cascade reaction combining dehydrochlorination and hydrochlorination can produce valuable compounds without the need for tedious treatment steps. Among the screened heterogeneous catalysts, the mixed BaF2-NAC-M catalyst showed the best catalytic performance, with BaF2 and NAC playing different roles.
ACS ES&T ENGINEERING
(2022)
Article
Microbiology
Jia-jun Huang, Tao Wei, Zhi-wei Ye, Qian-wang Zheng, Bing-hua Jiang, Wen-feng Han, An-qi Ye, Pei-yun Han, Li-qiong Guo, Jun-fang Lin
Summary: This study focused on the synthesis of paclitaxel and integrated the DBAT gene into Escherichia coli. A mutant gene dbat(S189V) was obtained from a mutation library and showed improved stability. By combining protein engineering and metabolic engineering, the production of paclitaxel was significantly increased. These findings suggest a promising strategy for paclitaxel production.
FRONTIERS IN MICROBIOLOGY
(2022)
