Review
Chemistry, Physical
Ru-Ri Lee, I-Jeong Jeon, Won-Jun Jang, Hyun-Seog Roh, Jae-Oh Shim
Summary: Hydrogen is primarily produced from fossil fuels through steam reforming, but alternative methods using waste as a resource are gaining attention. The water-gas shift reaction is crucial for hydrogen production from waste, but a suitable catalyst is needed due to the higher CO concentration in waste-derived syngas. This study reviews the development of catalysts for waste-derived hydrogen production and provides essential knowledge for catalyst design.
Review
Chemistry, Physical
Haiyan Wang, Shida Liu, Haoqi Wang, Junnan Chao, Tingting Li, Naoko Ellis, Wenli Duo, Xiaotao Bi, Kevin J. Smith
Summary: This article introduces the conversion of woody biomass into synthesis gas through gasification and the use of catalysts to remove tars and adjust product ratios. Catalysts play a crucial role in all processing steps, and recent advances in catalyst development, including stability, reaction mechanisms, and structure-activity relationships, are discussed. The economic viability of biomass conversion to fuels and chemicals is also evaluated.
CATALYSIS REVIEWS-SCIENCE AND ENGINEERING
(2023)
Article
Energy & Fuels
Jaeuk Shin, Myung Soo Kang, Jungho Hwang
Summary: The study demonstrates that increasing CO(2) concentration leads to decreased CO conversion and H(2) yield in bio-syngas, suggesting keeping the steam/CO ratio at 3 or higher to minimize the negative impact of CO(2) on WGSR. The highest CO conversion and H(2) yield are achieved at a reaction temperature of 400 degrees C regardless of CO(2) concentration. As GHSV decreases, CO conversion approaches equilibrium while H(2) yield remains constant.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2021)
Article
Chemistry, Physical
Ozgen Yalcin, Israel E. Wachs, Isik Onal
Summary: The study investigated the role of Cr in iron oxide-based catalysts through theoretical calculations, finding that Cr does not act as a chemical promoter and does not positively affect catalytic activity.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Physical
Deshetti Jampaiah, Devaiah Damma, Perla Venkataswamy, Anastasios Chalkidis, Hamidreza Arandiyan, Benjaram M. Reddy
Summary: The water-gas shift (WGS) reaction is crucial for producing hydrogen and renewable energy in modern technologies. Catalysts, such as Cu/CeO2, play a vital role in achieving high CO conversion and hydrogen generation activity in the WGS reaction. This study investigates the influence of CuCe-MOF templated approach on the WGS activity of Cu/CeO2 catalysts.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Physical
Minghui Tan, Sha Tian, Tao Zhang, Kangzhou Wang, Liwei Xiao, Jiaming Liang, Qingxiang Ma, Guohui Yang, Noritatsu Tsubaki, Yisheng Tan
Summary: By functionalizing the surface of a Cu/ZnO catalyst with stearic acid, the hydrophobicity of the catalyst is significantly enhanced while maintaining its structure and catalytic performance almost unchanged. The hydrophobic Cu/ZnO catalyst shows positive inhibitory effects on the water-gas shift reaction in one-step DME synthesis. The improved catalytic performance demonstrates the importance of surface hydrophobicity in heterogeneous catalysts.
Review
Engineering, Environmental
Yeol-Lim Lee, Kyoung-Jin Kim, Ga-Ram Hong, Hyun-Seog Roh
Summary: This review focuses on the reaction conditions and catalysts for water-gas shift reaction (WGSR) in various feed gases, including natural gas, biomass, municipal solid waste, and coal-derived synthesis gas. The performance of catalysts, including capacity, temperature, feed gas composition, and steam-to-carbon ratio, are compared to understand the development progress. The insights from this study provide valuable information for target-oriented WGSR in different feed gases.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Chemical
Lixuan Ma, Baojun Wang, Maohong Fan, Lixia Ling, Riguang Zhang
Summary: Inspired by the sensitivity of methanol and WGSR to Cu active site types, a specific defect type of Cu active site is proposed to facilitate methanol synthesis and effectively suppress WGSR to produce CO2. DFT calculations were used to investigate the detailed mechanism of syngas-to-methanol and WGSR over Cu catalysts. It was found that the adsorption and dissociation ability of H2O over different Cu active sites can be tuned to regulate WGSR and decrease CO2 selectivity. The relationship between GCN value, d-band center of active center, and the activity of methanol and WGSR was proposed to screen high-performance catalysts. This study provides a theoretical basis for designing and optimizing Cu-based catalysts to suppress WGSR and lower CO2 selectivity by adjusting Cu active sites to specific defect types.
CHEMICAL ENGINEERING SCIENCE
(2023)
Article
Chemistry, Physical
Joyjit Chattoraj, Brahim Hamadicharef, Yusuf Nizar Aris Syadzali, Gerren Owen Limantara, Yingzhi Zeng, Chee Kok Poh, Luwei Chen, Teck Leong Tan
Summary: This article reports the construction of a database on water-gas shift reaction using noble metal catalysts for fuel cell applications, and evaluates the effects of catalytic compositions and reaction conditions on carbon monoxide conversion using a machine learning approach with Shapley feature importance methodology. The proposed theory-guided machine learning model outperforms other state-of-the-art models and offers promising possibilities for finding suitable catalysts.
Article
Chemistry, Applied
Jingjing Li, Sarayute Chansai, Christopher Hardacre, Xiaolei Fan
Summary: The water gas shift (WGS) reaction is crucial for various industrial processes, but achieving both thermodynamic equilibrium conversion and fast kinetics under conventional conditions is challenging. Non-thermal plasma (NTP) processes have been proposed to improve the kinetics at low temperatures and achieve favorable thermodynamic conversion. This review critically examines the progress in NTP-assisted WGS reactions, including catalytic and non-catalytic systems, and evaluates the concept of reaction-separation integration using novel membrane reactors to enhance hydrogen production.
Article
Engineering, Environmental
Ruiying Li, Xiuhui Zheng, Fei Wang, Hao Yan, Xin Zhou, Yongxiao Tuo, Yibin Liu, Xiang Feng, Xiaobo Chen, De Chen, Chaohe Yang
Summary: The effect of surface Mo and C coordination on the low-temperature WGS activity of Pt/alpha-MoC1-x catalysts was investigated. The study found that a decrease in the Mo:C ratio led to a weakened electron transfer ability and decreased catalytic activity. The 0.4% Pt/alpha-MoC1-x -50 catalyst exhibited superior hydrogen production activity and low apparent activation energy at low temperatures.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Multidisciplinary Sciences
Yuanyuan Li, Matthew Kottwitz, Joshua L. Vincent, Michael J. Enright, Zongyuan Liu, Lihua Zhang, Jiahao Huang, Sanjaya D. Senanayake, Wei-Chang D. Yang, Peter A. Crozier, Ralph G. Nuzzo, Anatoly Frenkel
Summary: This study reveals the dynamic characteristics of a Pt/CeO2 system for the water gas shift reaction, showing the formation and transformation of perimeter Pt-0-O vacancy-Ce3+ sites that regulate adsorbate behaviors and play a key role in the catalytic mechanism. The dynamic nature of these sites is crucial for understanding the reaction mechanism.
NATURE COMMUNICATIONS
(2021)
Article
Engineering, Environmental
Rei-Yu Chein, Wei-Hsin Chen, Hwai Chyuan Ong, Pau Loke Show, Yashvir Singh
Summary: This study analyzed the methanol synthesis performance using CO2 and syngas as feedstock, finding that increasing reactor diameter can enhance methanol yield but large pressure drops may reduce the yield. Removing water and increasing reaction temperature were found to increase methanol yield and CO2 conversion. Additionally, higher CH4 content in the biogas can lead to higher methanol production and using a higher recycle ratio for unreacted syngas can enhance methanol production.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Chemistry, Physical
M. Ariens, V Chlan, P. Novak, L. G. A. van de Water, A. Dugulan, E. Bruck, E. J. M. Hensen
Summary: Research has shown that chromium enhances the water-gas shift activity of iron oxide catalysts, leading to increased CO conversion rates by preventing the reduction of Fe3+ to Fe2+. Despite an increase in the Fe3+/Fe2+ ratio, the presence of chromium does not affect the high CO conversion rates associated with structural stabilization mechanisms.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Article
Chemistry, Applied
Andrea Fasolini, Elena Spennati, Sina Ebrahim Atakoohi, Matteo Percivale, Guido Busca, Francesco Basile, Gabriella Garbarino
Summary: Ni/Mg/Al mixed oxides were prepared from layered double hydroxides of the hydrotalcite family. The prepared materials consist of a rock-salt type Mg1-xNixO solid solution with Al3+ in the tetrahedral interstices. These materials, when activated at high temperature, convert into optimal size supported Ni metal catalysts which show high activity and selectivity for CO2 methanation. The presence of basic oxides as activating components enhances the adsorption of CO2 on the support, forming surface (bi)carbonates as active species.
Article
Engineering, Environmental
Naoko Ellis, Mohammad S. Masnadi, Daniel G. Roberts, Mark A. Kochanek, Alexander Y. Ilyushechkin
CHEMICAL ENGINEERING JOURNAL
(2015)
Article
Energy & Fuels
Meijun Wang, Jilin Tian, Daniel G. Roberts, Liping Chang, Kechang Xie
Article
Energy & Fuels
Michele Vascellari, Daniel G. Roberts, San Shwe Hla, David J. Harris, Christian Hasse
Article
Chemistry, Applied
San Shwe Hla, Daniel G. Roberts, David J. Harris
FUEL PROCESSING TECHNOLOGY
(2015)
Article
Engineering, Environmental
San Shwe Hla, Daniel Roberts
Article
Energy & Fuels
San Shwe Hla, Romain Lopes, Daniel Roberts
Article
Chemistry, Applied
Alexander Y. Ilyushechkin, Daniel Roberts
FUEL PROCESSING TECHNOLOGY
(2016)
Article
Chemistry, Applied
Saartjie M. Gouws, Hein W. J. P. Neomagus, Daniel G. Roberts, John R. Bunt, Ray C. Everson
FUEL PROCESSING TECHNOLOGY
(2018)
Article
Chemistry, Applied
Alexander Y. Ilyushechkin, San Shwe Hla, Xiaodong Chen, Daniel G. Roberts
FUEL PROCESSING TECHNOLOGY
(2018)
Article
Energy & Fuels
D. G. Roberts, D. J. Harris
Article
Energy & Fuels
Meijun Wang, Daniel G. Roberts, Mark A. Kochanek, David J. Harris, Liping Chang, Chun-Zhu Li
Article
Energy & Fuels
Daniel G. Roberts, David J. Harris
Article
Energy & Fuels
San Shwe Hla, L. D. Morpeth, Y. Sun, G. J. Duffy, A. Y. Ilyushechkin, D. G. Roberts, J. H. Edwards
Article
Chemistry, Applied
Daniel G. Roberts, Alexander Y. Ilyushechkin, David J. Harris
FUEL PROCESSING TECHNOLOGY
(2012)
Article
Chemistry, Applied
Alexander Y. Ilyushechkin, Daniel G. Roberts, David J. Harris
FUEL PROCESSING TECHNOLOGY
(2014)