Article
Energy & Fuels
Masoumeh Khanchi, Seyed Mohammad Ali Mousavian, Saeed Soltanali
Summary: The experimental results show that SiO2-Al2O3-based catalysts perform better than SiO2 and Al2O3-based catalysts, with the best performance observed at lower Si/Al ratios.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2022)
Article
Chemistry, Physical
Qiang Wang, Guiru Zhang, Jiali Zhao, Li Zhang, Qi Zhang
Summary: This paper presents the preparation and performance comparison of a mesh-type structured catalyst in a plate microreactor, showing that although the catalyst has lower intrinsic activity, it exhibits higher methanol conversion, higher hydrogen production capacity, and shorter start-up time. Furthermore, the catalyst demonstrates excellent stability in a 160-hour test.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Physical
Filippo Bossola, Thantip Roongcharoen, Mauro Coduri, Claudio Evangelisti, Ferenc Somodi, Luca Sementa, Alessandro Fortunelli, Vladimiro Dal Santo
Summary: The addition of In as a promoter in a Cu/SiO2 catalyst enhances H-2 productivity by facilitating H2O activation through improved electronic properties of the Cu phase, leading to better interaction with small Cu nanoparticles and silica.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Article
Materials Science, Ceramics
Lukas Thoni, Nadia Metzkow, Alexander Eychmuller
Summary: This paper presents a comparison of aerogels dried under different conditions, with solvent, temperature, and pressure being the most important factors. The comparison is mainly based on analysis of nitrogen adsorption experiments and transmission electron microscopy imaging. Platinum loaded indium oxide aerogels are chosen as a model system, as they are highly effective heterogeneous catalysts in methanol steam reforming. Supercritical, freeze- and ambient conditions drying methods can achieve high porosities and large specific surface areas, while maintaining the original gel morphology in most methods except freeze drying and ambient conditions drying from acetone.
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
(2023)
Article
Chemistry, Physical
Jianglong Pu, Eika W. Qian, Yi Luo, Kihoon Kim, Mingming Peng
Summary: In this study, Nd-doped Ni@A(2)O(3) core-shell catalysts were prepared to enhance the coke resistance of Ni-based catalysts. The catalytic performance was greatly improved by the incorporation of Nd, leading to decreased yields of CO, CH4, and acetone, increased yield of CO2, and remarkable carbon resistance. The Ni0.01Nd@Al catalyst balanced the exposed Ni surface and the mobile lattice oxygen, showing the highest catalytic activity, lowest coke deposition, and superb decoking ability.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Materials Science, Ceramics
Chenxu Guo, Hanning Xiao, Wenming Guo, Tingting Bao, Jiawei Xie, Hang Qin, Pengzhao Gao
Summary: CuO-ZnO-CeO2 catalysts were prepared on Al2O3/cordierite monolith through sol-gel combustion method, and the effects of combustion temperature on the properties and performance of the catalysts were investigated. The catalyst (CZC-400) prepared at 400 degrees C showed uniform distribution on the monolith with smaller particle size (4.2 nm) and higher surface area (23.7 m(2) g(-1)). In methanol steam reforming, CZC-400 exhibited 100% methanol conversion at 260 degrees C without by-product CO, and maintained excellent catalytic activity and stability for 32 hours.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Multidisciplinary
Didi Li, Zhen Wang, Shiqing Jin, Minghui Zhu
Summary: This study investigates the deactivation and regeneration mechanisms of the Cu/ZnO/Al2O3 catalyst in low temperature methanol steam reforming. It is found that the deactivation is mainly caused by the poisoning of Cu species associated with surface-oxygenated species, rather than carbon deposition and strong metal-support interaction. Furthermore, the addition of O-2 can partially restore the catalytic activity.
SCIENCE CHINA-CHEMISTRY
(2023)
Article
Engineering, Environmental
Guiru Zhang, Jiali Zhao, Qiang Wang, Taotao Yang, Qi Zhang, Li Zhang
Summary: Metal-oxide interaction has favorable effects on improving adsorption strength tuning and catalytic performance. The synthesized CuFeMg/Al2O3 structural catalyst showed high efficiency and stability in methanol steam reforming.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Chemistry, Physical
Didi Li, Fang Xu, Xuan Tang, Sheng Dai, Tiancheng Pu, Xianglin Liu, Pengfei Tian, Fuzhen Xuan, Zhi Xu, Israel E. Wachs, Minghui Zhu
Summary: The surface structure of catalysts plays a crucial role in their catalytic performance. This study reveals that manipulating the catalyst surface reconstruction process can enhance long-term stability and catalytic activity by controlling the composition of reducing agents during activation.
Article
Chemistry, Physical
Tianqing Zheng, Dongjie Zhou, Youji Zhan, Yongchao Xu
Summary: By optimizing the integration design of the self-thermal methanol steam reforming microreactor, the hydrogen production capability can be enhanced, resulting in increased methanol conversion rate and hydrogen yield.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Physical
Haiguang Wang, Yongfeng Liu, Jun Zhang
Summary: CuO/ZnO/Al2O3 catalysts were prepared using an oxalate precursor via co-precipitation method. Ethanol was found to influence the crystalline phase composition of the oxalate precursor. Microwave irradiation promoted isomorphous substitution between Cu2+ and Zn2+, forming the master phase (Cu,Zn)C2O4. After calcination, a solid solution Cu-O-Zn with nano-fibriform morphology was formed. The catalyst exhibited small CuO grains, a large surface area, and strong synergistic effects between CuO and ZnO, which improved the catalytic performance of methanol steam reforming.
Article
Energy & Fuels
Sha Li, Jiale Zhang, Bin Zhu, Wenju Wang
Summary: In this study, low-cost nickel catalysts supported on La, Ce, and Mg-promoted Al2O3 and ZrO2 were prepared and compared for hydrogen production from glycerol steam reforming. La-promoted Ni/Al2O3 catalyst exhibited the highest activity and stability, while Ce-promoted Ni/ZrO2 catalyst showed stable but lower carbon gasification efficiency due to the large Ni crystals over the bulk ZrO2 supports.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2021)
Article
Chemistry, Applied
Evgeny A. Belopukhov, Dmitry Kir'yanov, Mikhail D. Smolikov, Violetta A. Shkurenok, Alexander S. Belyi, Alexander Lavrenov, Andrey Kleimenov, Dmitry O. Kondrashev
Summary: The study found that the increase in acidity of Pt-Re/Al2O3 catalysts promoted by fluorine in the reforming of n-heptane can enhance their activity towards the transformations of n-heptane and decrease the content of aromatic hydrocarbons in the reformate while retaining the octane number.
Article
Chemistry, Physical
Nicolas Koewitsch, Stefan Barth, Kevin Ploner, Raoul Blume, Detre Teschner, Simon Penner, Marc Armbruester
Summary: Heterogeneous catalysts are complex materials, and the role of single components is difficult to determine. In methanol steam reforming, intermetallic In-Pt compounds play a crucial role in Pt/In2O3 materials with excellent CO2-selectivity.
Article
Chemistry, Physical
Surendar Moogi, Lingaiah Nakka, S. Sai Prasad Potharaju, Ashfaq Ahmed, Abid Farooq, Sang-Chul Jung, Gwang Hoon Rhee, Young-Kwon Park
Summary: Different cobalt-based mixed oxide catalysts were synthesized and tested for hydrogen production from glycerol steam reforming, with the 5Cu20CM catalyst showing the best performance attributed to its small particle size, high dispersion, and large surface area.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Nanoscience & Nanotechnology
Melania Reggente, Patrick Masson, Camille Dollinger, Heinz Palkowski, Spyridon Zafeiratos, Leandro Jacomine, Daniele Passeri, Marco Rossi, Nihal Engin Vrana, Genevieve Pourroy, Adele Carrado
ACS APPLIED MATERIALS & INTERFACES
(2018)
Article
Chemistry, Multidisciplinary
Guigang Zhang, Lihua Lin, Guosheng Li, Yongfan Zhang, Aleksandr Savateev, Spiros Zafeiratos, Xinchen Wang, Markus Antonietti
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2018)
Article
Chemistry, Physical
Viktoriia A. Saveleva, Li Wang, Detre Teschner, Travis Jones, Aldo S. Gago, K. Andreas Friedrich, Spyridon Zafeiratos, Robert Schloegl, Elena R. Savinova
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2018)
Article
Chemistry, Multidisciplinary
P. Lettenmeier, J. Majchel, L. Wang, V. A. Saveleva, S. Zafeiratos, E. R. Savinova, J. -J. Gallet, F. Bournel, A. S. Gago, K. A. Friedrich
Article
Chemistry, Physical
Alexandr G. Oshchepkov, Antoine Bonnefont, Sergey N. Pronkin, Olga V. Cherstiouk, Corinne Ulhaq-Bouillet, Vasiliki Papaefthimiou, Valentin N. Parmon, Elena R. Savinova
JOURNAL OF POWER SOURCES
(2018)
Article
Materials Science, Multidisciplinary
Brandon Azeredo, Anne Carton, Cedric Leuvrey, Celine Kiefer, Dris Ihawakrim, Spyridon Zafairatos, Mathieu Gallart, Pierre Gilliot, Benoit P. Pichon
JOURNAL OF MATERIALS CHEMISTRY C
(2018)
Article
Chemistry, Multidisciplinary
Guigang Zhang, Guosheng Li, Tobias Heil, Spiros Zafeiratos, Feili Lai, Aleksandr Savateev, Markus Antonietti, Xinchen Wang
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2019)
Article
Chemistry, Physical
Angus Crake, Konstantinos C. Christoforidis, Robert Godin, Benjamin Moss, Andreas Kafizas, Spyridon Zafeiratos, James R. Durrant, Camille Petit
APPLIED CATALYSIS B-ENVIRONMENTAL
(2019)
Article
Chemistry, Physical
V. A. Saveleva, L. Wang, O. Kasian, M. Batuk, J. Hadermann, J. J. Gallet, F. Bournel, N. Alonso-Vante, G. Ozouf, C. Beauger, K. J. J. Mayrhofer, S. Cherevko, A. S. Gago, K. A. Friedrich, S. Zafeiratos, E. R. Savinova
Article
Chemistry, Physical
NUria J. Divins, Eduardo Lopez, Inmaculada Angurell, Stefan Neuberg, Ralf Zapf, Gunther Kolb, Jordi Llorca
Article
Chemistry, Multidisciplinary
Wojciech Gac, Witold Zawadzki, Marek Rotko, Magdalena Greluk, Grzegorz Slowik, Helmut Pennemann, Stefan Neuberg, Ralf Zapf, Gunther Kolb
Summary: The study reported direct methanation of CO2 over ceria- and alumina-supported nickel catalysts in the feed stream containing methane and traces of H2S. The results showed that ceria-supported nickel catalyst exhibited higher conversion at 350 degrees Celsius, while the introduction of trace amounts of H2S led to rapid decrease in CO2 conversion and CH4 selectivity.
Article
Chemistry, Physical
Tobias Weissenberger, Ralf Zapf, Helmut Pennemann, Gunther Kolb
Summary: The catalytic combustion of hydrogen and ammonia-containing off-gas surrogate from an ammonia solid oxide fuel cell (SOFC) was studied. The results showed that the tested catalysts were able to completely convert hydrogen and ammonia present in the off-gas. The formation of nitrogen oxides (NOx) increased with reaction temperature and stagnated at temperatures of 600 degrees C and higher.
Article
Engineering, Chemical
Kyatsinge Cedric Musavuli, Nicolaas Engelbrecht, Raymond Cecil Everson, Phillimon Modisha, Gunther Kolb, Ralf Zapf, Christian Hofmann, Dmitri Bessarabov
Summary: The study investigates the synthesis of methanol using a fixed-bed reactor with CO2 as the carbon feedstock. The results show promising performance under high pressure and specific conditions, providing insights for finding new ways to utilize CO2.
Article
Engineering, Chemical
Valery A. Danilov, Christian Hofmann, Gunther Kolb
Summary: The modeling of transfer processes was conducted to generalize and interpret experimental data on heat transfer. A two-dimensional model based on a homogeneous mixture model was developed for boiling water flow in a microchannel, with a new evaporation submodel. The simulation successfully predicted the distribution of velocity, void fraction, and temperature profiles in the microchannel, with the predicted temperature profile consistent with experimental literature data.
Article
Chemistry, Multidisciplinary
Wassila Derafa, Fotios Paloukis, Basma Mewafy, Walid Baaziz, Ovidiu Ersen, Corinne Petit, Gwenael Corbel, Spyridon Zafeiratos