Article
Energy & Fuels
Anuj Kumar, Ram K. Gupta, Mohd Ubaidullah, Abdullah M. Al-Enizi, Bidhan Pandit, Senthilkumar Nangan, V. Jagadeesha Angadi, Ghulam Yasin
Summary: This article reports a hollow mesoporous Fe-graphitic carbon nitride supported on carbon nanotubes (Fe-C3N3@CNTs) as a superior electrocatalyst for the oxygen reduction reaction (ORR) in fuel cells. The Fe-C3N3@CNTs composite showed dominant 4e-ORR pathway, exceptional methanol tolerance, and durability. Theoretical analysis revealed that Fe-C3N3 catalytic moieties facilitated the adsorption and desorption of oxygen, enabling efficient ORR.
Article
Chemistry, Physical
Fei Xiao, Qi Wang, Gui-Liang Xu, Xueping Qin, Inhui Hwang, Cheng-Jun Sun, Min Liu, Wei Hua, Hsi-wen Wu, Shangqian Zhu, Jin-Cheng Li, Jian-Gan Wang, Yuanmin Zhu, Duojie Wu, Zidong Wei, Meng Gu, Khalil Amine, Minhua Shao
Summary: Researchers have designed a hybrid electrocatalyst consisting of atomically dispersed platinum and iron single atoms, as well as platinum-iron alloy nanoparticles. This electrocatalyst exhibits higher activity and durability in proton exchange membrane fuel cells.
Article
Chemistry, Multidisciplinary
Wei-Shen Song, Mei Wang, Xiao Zhan, Yan-Jie Wang, Dong-Xu Cao, Xian-Meng Song, Zi-Ang Nan, Li Zhang, Feng Ru Fan
Summary: In this study, an atomically dispersed Fe-Pt dual-site catalyst (FePtNC) with high catalytic activity has been designed by modulating the electronic structure between adjacent metal sites. The FePtNC catalyst exhibited significantly better catalytic activity than single atom catalysts and metal-alloy nanocatalysts, with a half-wave potential of 0.90 V for the oxygen reduction reaction. Metal-air battery systems fabricated with the FePtNC catalyst showed peak power density values of 90.33 mW cm(-2) (Al-air) and 191.83 mW cm(-2) (Zn-air). The enhanced catalytic activity of the FePtNC catalyst is attributed to the electronic modulation effect between adjacent metal sites, which was demonstrated through experiments and theoretical simulations.
Article
Materials Science, Multidisciplinary
Anna Gorlova, Andrey Zadesenets, Evgeniy Filatov, Pavel Simonov, Sergey Korenev, Olga Stonkus, Vladimir Sobyanin, Pavel Snytnikov, Dmitriy Potemkin
Summary: In this study, the properties of Pt0.5Cu0.5, Pt0.5Fe0.5, Pt0.33Ag0.67, and Pt0.6Au0.4 nanoalloys in water gas shift (WGS) reaction were investigated for the first time. It was found that only Pt0.5Fe0.5 nanopowder showed activity, while Pt-FeOx metal-oxide composite was inert. The positive effect of Pt-Fe alloying on WGS performance was also confirmed for silica supported catalysts.
MATERIALS RESEARCH BULLETIN
(2022)
Article
Engineering, Environmental
Chaohui Liu, Junyuan Xia, Jincui Gu, Wenqin Wang, Qingquan Liu, Luke Yan, Tao Chen
Summary: This study successfully developed a composite membrane of CNTs-PAA/MIL101(Fe)@Pt with excellent separation performance and stability for purification of oily waste water and effective separation of oil-in-water emulsions, showing potential applications in practical oily wastewater treatment.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Siyu Kuang, Minglu Li, Xiaoyi Chen, Haoyuan Chi, Jianlong Lin, Zheng Hu, Shi Hu, Sheng Zhang, Xinbin Ma
Summary: Researchers developed a method to synthesize highly ordered CuAu intermetallic nanoalloys that can efficiently convert CO2 to CO with high selectivity and stable performance for 160 hours. The improved stability is attributed to the strong atomic interactions between Cu and Au atoms in the intermetallic nanoalloy, while high valence gold atoms on the surface promote the reduction of CO2.
CHINESE CHEMICAL LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Xing Yang, Zihe Wu, Zhenyu Xing, Chengdong Yang, Weiwen Wang, Rui Yan, Chong Cheng, Tian Ma, Zhiyuan Zeng, Shuang Li, Changsheng Zhao
Summary: This study presents an IrPd electrocatalyst supported on ketjenblack that exhibits outstanding bifunctional performance for both HER and OER at wide pH conditions. The optimized IrPd catalyst shows specific activity of 4.46 and 3.98 A mg(Ir)(-1) in the overpotential of 100 and 370 mV for HER and OER, respectively, in alkaline conditions. When applied to the anion exchange membrane electrolyzer, the Ir44Pd56/KB catalyst demonstrates promising prospects for practical applications with stability of >20 h at a current of 250 mA cm(-2) for water decomposition. This work not only offers an advanced electrocatalyst, but also provides guidance for the rational design of desirable bifunctional electrocatalysts for HER and OER by regulating the microenvironments and electronic structures of metal catalytic sites for diverse catalysis.
Review
Chemistry, Physical
Xiong Zhang, Lai Truong-Phuoc, Tristan Asset, Sergey Pronkin, Cuong Pham-Huu
Summary: This review summarizes the notable progress in the development of low Pt-based and Fe-N-C electrocatalysts for proton exchange membrane fuel cell (PEMFC) applications. The research focuses on the design and optimization of Fe-N-C's as a cost-effective alternative to platinum-based catalysts. By comparing the performance of Fe-N-C's with that of commercial Pt/C catalysts, it is suggested that Fe-N-C's have the potential to be alternative candidates in PEMFCs. The review discusses various aspects including the mechanism, active sites, catalyst layer design, performance, and durability of Fe-N-C's in PEMFCs, aiming to provide insights into their potential as replacements for Pt-based catalysts and pointing out future research directions.
Article
Chemistry, Multidisciplinary
Kuan Deng, Peng Liu, Xuesong Liu, Hongjiao Li, Wen Tian, Junyi Ji
Summary: In this study, 3D CoO-Ni(OH)(2) nanosheets anchored on the metal organic framework-derived CNT arrays (CNTs@CoO-Ni(OH)(2)) for methanol oxidation reaction (MOR) were synthesized. The CNTs@CoO-Ni(OH)(2) exhibited a low potential, small Tafel slope, and high faradaic efficiency, comparable or better than high-end electrocatalysts. Moreover, this study provides a rational electrode structural design strategy for the electrochemical upgrade of methanol.
Article
Chemistry, Multidisciplinary
Tonghui Zhao, Mengting Li, Dongdong Xiao, Xiaoju Yang, Qihao Li, Lulu An, Zhiping Deng, Tao Shen, Mingxing Gong, Yi Chen, Gongwei Wang, Xu Zhao, Li Xiao, Xuan Yang, Li Li, Deli Wang
Summary: We report a heteroepitaxial core-shell structure that combines the advantages of the epilayer and the substrate, creating a multifunctional catalyst for catalysis application. The pseudomorphic-Pt atomic layer epitaxially growing on an IrPd-core matrix (PmPt@IrPd/C) exhibits significantly enhanced mass activity and stability compared to benchmark Pt/C. The improved stability is attributed to resistance to carbon corrosion and modulated hydroxyl adsorption.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Engineering, Environmental
Thanh Hai Nguyen, Phan Khanh Linh Tran, Duy Thanh Tran, Thanh Ngoc Pham, Nam Hoon Kim, Joong Hee Lee
Summary: We propose a novel catalyst that meets the reaction kinetics demands of metal-air battery and demonstrates excellent performance in both oxygen reduction reaction (ORR) and oxygen evolution reaction (OER). By enhancing the synergistic effects of OER and ORR, we have successfully developed high-performance zinc-air and aluminum-air batteries with exceptional cell voltage, power density, and durability, surpassing most existing materials.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Physical
Miguel A. Montiel, Rafael Granados-Fernandez, Sergio Diaz-Abad, Cristina Saez, Carmen M. Fernandez-Marchante, Manuel A. Rodrigo, Justo Lobato
Summary: This work successfully recovered platinum from spent membrane electrode assemblies (MEAs) used in the hydrogen production process and achieved a global efficiency of 70%. The recovered platinum was then synthesized into platinum electrocatalysts and characterized. Scanning electrochemical microscopy confirmed the well dispersion of platinum onto the carbon support. Electrodes with both commercial and recovered platinum catalysts were prepared and tested, with the catalyst from spent MEAs showing good activity and high stability for SO2 oxidation and H2 production. In conclusion, a circular economy of platinum-based catalysts for hydrogen production has been achieved.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Chemistry, Inorganic & Nuclear
Jie Xu, Sini Wang, Yingrui Feng, Peikun Wu, Siyu Tian, Zhenguo Fang, Qiangchun Liu, Xiangkai Kong
Summary: Fe-modified Ru nanosheets are achieved by using Al species as a sacrificial template, which improves the surface properties and enhances the hydrogen generation capability in both acidic and alkaline conditions.
INORGANIC CHEMISTRY
(2022)
Article
Nanoscience & Nanotechnology
Fang-Yu Lin, Pei-Yuan Lee, Tien-Fu Chu, Chang- Peng, Gou-Jen Wang
Summary: The study introduces a Pt/Au alloy electrode for enzyme-free glucose detection in a neutral environment with excellent specificity and sensitivity, showing feasibility for clinical applications.
INTERNATIONAL JOURNAL OF NANOMEDICINE
(2021)
Article
Chemistry, Physical
Xiao Duan, Feng Cao, Rui Ding, Xiaoke Li, Qingbing Li, Ruziguli Aisha, Shiqiao Zhang, Kang Hua, Zhiyan Rui, Yongkang Wu, Jia Li, Aidong Li, Jianguo Liu
Summary: In this study, sub-2 nm Co-doped Pt nanoclusters with a large ECSA were synthesized, displaying improved mass activity and stability compared to commercial Pt/C. The doping technique led to enhanced performance and reduced voltage loss in high current density conditions in PEMFCs.
ADVANCED ENERGY MATERIALS
(2022)
Article
Chemistry, Applied
Elodie Blanco, J. Noe Diaz de Leon, Jose Luis Garcia-Fierro, Nestor Escalona
Summary: The experiments showed that the enrichment of Re on the surface may improve the dispersion of Re and enhance the reaction rate of bimetallic catalysts. XPS results indicated a synergistic effect between Mo and Re carbides, promoting the demethylation of guaiacol to catechol.
Article
Chemistry, Applied
I Vazquez-Garrido, A. Lopez-Benitez, A. Guevara-Lara, G. Berhault
Summary: The addition of 1 mol% manganese to Al2O3 support has been shown to enhance the performance of NiMo catalysts for the hydroconversion of soybean oil, due to the stabilization of manganese oxide species aiding in the redispersion of the active phase.
Article
Chemistry, Multidisciplinary
Oscar German Olvera Olmedo, Jorge Noe Diaz de Leon Hernandez, Victor Alejandro Suarez-Toriello, Jose Antonio de los Reyes Heredia
Summary: The study investigated the influence of two different cerium salt precursors on the structure and catalytic activity of Rh catalysts supported on CexZr1-xO2 materials. The use of ammonium cerium (IV) nitrate as a precursor resulted in solid CexZr1-xO2 solutions with improved oxygen mobility and specific surface area, leading to higher activity and product yields for Rh supported on Ce0.5Zr0.5O2 solid solution. Raman analysis suggested the formation of surface defects adjacent to Rh clusters due to strong metal-support interaction effect.
JOURNAL OF THE MEXICAN CHEMICAL SOCIETY
(2021)
Article
Physics, Multidisciplinary
J. Antunez-Garcia, D. H. Galvan, J. Guerrero-Sanchez, F. N. Murrieta-Rico, R. Yocupicio-Gaxiola, S. Fuentes-Moyado
Summary: A robust analytical expression was obtained to predict the unique physical solution to Scholte's slowness for all elastic and isotropic medium using a Cauchy integrals based method. It was found that in the limit where the fluid above the solid vanishes, the slowness of the interface wave corresponds to that of a Rayleigh wave, indicating that a Scholte wave's propagation speed is less than or equal to a Rayleigh wave.
REVISTA MEXICANA DE FISICA
(2021)
Article
Multidisciplinary Sciences
Ravuri Syamsai, Jassiel R. Rodriguez, Vilas G. Pol, Quyet Van Le, Khalid Mujasam Batoo, Syed Adil Farooq, Saravanan Pandiaraj, M. R. Muthumareeswaran, Emad H. Raslan, Andrews Nirmala Grace
Summary: A bi-metallic titanium-tantalum carbide MXene, TixTa(4-x)C3, was successfully prepared by etching Al atoms from the parent TixTa(4-x)AlC3 MAX phase, displaying excellent reversible Li-ion storage performance.
SCIENTIFIC REPORTS
(2021)
Article
Green & Sustainable Science & Technology
Estephany Santiago, Georgina Pina-Luis, Marisela Martinez-Quiroz, Oscar Perez-Landeros, Navor Rosas-Gonzalez, Benjamin Valdez-Salas, Mercedes T. Oropeza-Guzman
Summary: The study synthesized three different magnetic nanoscavengers and characterized their correct synthesis through various methods; these nanoscavengers act as nano-adsorbents to improve reclaimed water quality, especially showing good performance in removing alkalinity and hardness.
ADVANCED SUSTAINABLE SYSTEMS
(2021)
Article
Electrochemistry
Jassiel R. Rodriguez, Deep Jokhakar, Harsha Rao, Keng-Wei Lin, Chieh-Tsung Lo, Sandra B. Aguirre, Vilas G. Pol
Summary: A stable and high-performance polyimide fiber mat was prepared using a simple two-step procedure, which exhibits higher thermal stability and better electrochemical performance compared to commercial polypropylene separators. The polyimide fibers show suppression of Li dendrite growth, lower polarization, and charge transfer impedance, as well as enhanced cycle performance and stability in full cells. This results in a higher charge capacity, capacity retention, and coulombic efficiency after multiple cycles.
ELECTROCHIMICA ACTA
(2021)
Article
Engineering, Chemical
Francisco A. De la Rosa-Priego, Eduardo D. Gutierrez-Lopez, Trino A. Zepeda, Manuel Acosta-Alejandro, Anna M. Venezia, Sergio Fuentes-Moyado, Barbara Pawelec, Jorge Noe Diaz-de-Leon
Summary: This study describes the preparation of mesoporous binary oxides using a one-step soft template sol-gel process, which were then used as catalysts in CO2 hydrogenation. The catalyst modified with 20% Fe2O3 showed the best performance in producing C2+ hydrocarbons. A higher Fe2O3 content resulted in a significant decrease in the reverse water gas shift (RWGS) reaction and a linear correlation was found between the surface exposure of Fe-0 species and the yield of C2+ hydrocarbons.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2021)
Article
Engineering, Chemical
Omar U. Valdes-Martinez, Jorge Noe Diaz de Leon, Carlos E. Santolalla, Alfonso Talavera-Lopez, Hugo Avila-Paredes, Jose Antonio de los Reyes
Summary: The study investigates the impact of different supports on Ru catalysts in the HDO reaction, revealing that supports have a significant influence on the activity of different molecules, which occurs through a cooperative action between the metallic phase and the support. In the reactions of ethanol and cyclohexanol, acid properties become more relevant at higher temperatures, while the metallic function decreases as the temperature rises.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2021)
Article
Chemistry, Physical
Jamila Sakfali, Semy Ben Chaabene, Rym Akkari, Frederic Dappozze, Gilles Berhault, Chantal Guillard, Mongia Said Zina
Summary: ZrO2 nanoparticles were prepared using a 'one-pot' sol-gel method followed by thermal post-treatments, allowing the creation of intermediary band gap sites and enabling photocatalytic activity under UV irradiation. The photoactivity of ZrO2 samples is dependent on the mid band gap value, which can be influenced by the ZrO2 phase, surface oxygen defects, and lattice distortion at high temperatures. Further research is warranted to explore the implications of these findings.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Nuhad Abdullah Alomair, Nouf Saleh Al-Aqeel, Sanaa Saad Alabbad, Hafedh Kochkar, Gilles Berhault, Muhammad Younas, Fathi Jomni, Ridha Hamdi, Ismail Ercan
Summary: The potential role of in situ formed Sr-Ti-O species as a ferroelectric component to enhance the photocatalytic properties of TiO2 semiconductor was evaluated. Different Cu-doped/graphene oxide (GO)/TiO2 nanotubes (TiNTs) composites, with varying amounts of strontium, were synthesized and characterized using various techniques. The presence of ferroelectric polarization induced by the addition of strontium was clearly observed, resulting in enhanced photocatalytic properties in the adjacent semiconductor.
Article
Nanoscience & Nanotechnology
Jassiel R. Rodriguez, Henry J. Hamann, Garrett M. Mitchell, Volkan Ortalan, Daniel Gribble, Beichen Xiong, Vilas G. Pol, P. Veeraraghavan Ramachandran
Summary: Ammonia-borane reduction of tin (II) chloride was used to prepare customized and interconnected Sn@SnO2 core-shell nanoparticles. The Sn@SnO2-based electrode exhibited high reversible capacity, rate capability, and capacity retention, as well as low charge transfer resistance and electrode polarization. The presence of voids and a SnO2 shell in the interconnected Sn@SnO2 nanoparticles contributed to stable lithium-ion storage.
ACS APPLIED NANO MATERIALS
(2023)
Article
Chemistry, Physical
J. A. Medina Cervantes, J. N. Diaz de Leon, S. Fuentes Moyado, G. Alonso-Nunez
Summary: This study investigated the influence of different precursor compounds and the addition of nickel on the structural and catalytic properties of CoNiMo catalysts supported on SBA-15. The results showed that the type of precursor compound used and the amount of nickel added had a significant impact on the HDS activity of the catalysts.
MOLECULAR CATALYSIS
(2023)
Article
Materials Science, Multidisciplinary
Takashi J. Yokokura, Zhimin Qi, Haiyan Wang, Palanisamy Manikandan, Vilas G. Pol, Jassiel R. Rodriguez
Summary: The performance of lithium-ion batteries can be improved by controlling the structure, texture, defects, dopants, and architecture of carbon-based anodes. This study investigated a novel prolate carbon shape with dual short-ordered graphite-like and turbostratic arrangements as an anode material, which demonstrated promising reversible capacity and stable performance. Physico-chemical and electrochemical studies were conducted to understand the lithium-ion storage mechanism of the novel architecture.
Article
Electrochemistry
Jassiel R. Rodriguez, Bumjoon Seo, Brett M. Savoie, Vilas G. Pol
Summary: Experimental and simulation studies have revealed the molecular basis for the different solvation behaviors of KPF6 and LiPF6 salts in EC and DEC solvents, leading to the development of a new K-ion electrolyte with increased KPF6 solubility and enhanced ionic conductivity.
BATTERIES & SUPERCAPS
(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.
