Article
Chemistry, Applied
Marco Pizzolato, Giulia Da Pian, Elena Ghedini, Alessandro Di Michele, Federica Menegazzo, Giuseppe Cruciani, Michela Signoretto
Summary: The effects of vanadium promotion on gamma-alumina supported nickel catalysts for methane dry reforming were investigated. The introduction of vanadium was crucial to hinder catalyst deactivation by coke deposition. The formation of nanotubes was reduced and hydrogen yield increased. When coupled with calcium, selectivity toward hydrogen/syngas production was improved. Under concentrated gases, vanadium was fundamental for a higher activity, with an increase of 30% and 15% in CH4 and CO2 conversions compared with the non-doped catalyst.
Article
Energy & Fuels
Baitang Jin, Shiguang Li, Xinhua Liang
Summary: The study deposited highly dispersed nickel nanoparticles on aluminum oxide using atomic layer deposition, and found that the addition of MgO increased the basicity of catalyst surfaces, assisting CO2 adsorption and activation. Although the formation of NiO-MgO solid solution did not improve overall reducibility, the interaction between reduced Ni nanoparticles and MgO inhibited sintering and provided sufficient metal-support interface for CO2 activation, leading to higher methane reforming rates.
Article
Chemistry, Physical
Robert Franz, Donato Pinto, Evgeny A. Uslamin, Atsushi Urakawa, Evgeny A. Pidko
Summary: This study investigates the use of Ni/Al2O3 catalysts for dry reforming of methane, with a focus on the effects of different promoters on catalyst stability. Higher iron loading on the catalyst leads to lower coke formation during dry reforming. Additionally, promoters with high CO2 affinity can accelerate catalyst oxidation during regeneration, ultimately leading to sintering and increased coke formation. Promoters with significant CO2 interaction are more effective on sintered catalyst samples compared to unpromoted Ni/Al2O3.
Article
Chemistry, Physical
Robert Franz, Frans D. Tichelaar, Evgeny A. Uslamin, Evgeny A. Pidko
Summary: The study investigated the impact of passivation on the catalytic performance of Ni/Al2O3 catalysts in dry reforming of methane, showing that changes in conversion and coke content can track sintering of Ni particles. The study also revealed adverse effects of catalyst passivation in excess O2, leading to rapid local overheating and Ni sintering, even at small catalyst scales.
APPLIED CATALYSIS A-GENERAL
(2021)
Article
Chemistry, Applied
Yanan Diao, Haiyan Wang, Bingbing Chen, Li Wang, Xiao Zhang, Chuan Shi
Summary: Plasma-assisted dry reforming of methane is a promising method to produce syngas with unity H2/CO ratio. The design of efficient catalyst materials is of great importance to establish a match between CH4 and CO2 activation rates. Addition of La to the highly ordered mesoporous 10Ni5LaAl-one pot catalyst enhanced reducibility of Ni2+ species and promoted Ni dispersion, resulting in the highest catalytic activity and cokeresistance ability. Stability performance was achieved due to higher discharge power, efficient capacitance, and lower apparent activation energy of CO2 under plasma condition. A possible reaction mechanism was proposed for the 10Ni5LaAl-one pot catalyst during plasma-catalytic dry reforming process.
FUEL PROCESSING TECHNOLOGY
(2023)
Article
Chemistry, Physical
Marcin Cichy, Monika Panczyk, Grzegorz Slowik, Witold Zawadzki, Tadeusz Borowiecki
Summary: Methane reforming with CO2 is a hot research topic due to the increasing demand for new hydrogen sources. In this study, a series of commercial nickel catalysts supported on a-Al2O3 and modified with different amounts of rhenium were investigated. The addition of rhenium positively influenced the stability and activity of the catalyst, and the formation of Ni-Re alloy played a significant role in enhancing its properties.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Energy & Fuels
Ahmed S. Al-Fatesh, Ahmed A. Ibrahim, Ahmed I. Osman, Ahmed E. Abasaeed, Mohammed F. Alotibi, Sadeq A. Alfatesh, David W. Rooney, Anis H. Fakeeha, Chun-Yang Yin
Summary: This study reports the performance of a cobalt-aluminum-strontium catalyst for dry reforming reaction to produce syngas. The characteristics of the catalyst and the effects of optimized Sr loading on catalytic performance were evaluated using various analytical techniques.
ENERGY SCIENCE & ENGINEERING
(2023)
Article
Chemistry, Physical
Huayu Qiu, Jingyu Ran, Xin Huang, Zhiliang Ou, Juntian Niu
Summary: The study on six types of alumina-supported Ni catalysts revealed that proper preparation parameters and reaction conditions could increase the amount of Ni reduced from NiAl2O4, decrease the formation of inert carbon, and improve the catalyst performance.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Physical
Abdulaziz Bagabas, Ahmed Sadeq Al-Fatesh, Samsudeen Olajide Kasim, Rasheed Arasheed, Ahmed Aidid Ibrahim, Rawan Ashamari, Khalid Anojaidi, Anis Hamza Fakeeha, Jehad K. Abu-Dahrieh, Ahmed Elhag Abasaeed
Summary: A new nickel-based catalyst with MgO promoter showed efficient performance in the dry reforming of methane process, achieving high conversion rates and low carbon deposition. The study highlights the importance of catalyst composition in improving the DRM process efficiency and sustainability.
Article
Chemistry, Multidisciplinary
Gaukhar E. Ergazieva, Moldir M. Telbayeva, Anna N. Popova, Zinfer R. Ismagilov, Kusman Dossumov, Laura K. Myltykbayeva, Vadim G. Dodonov, Sergey A. Sozinov, Almagul I. Niyazbayeva
Summary: Ni-Co/gamma-Al2O3 bimetallic catalysts were synthesized using solution combustion method, leading to higher methane conversion rates and suitability for low-temperature DRM reactions.
Article
Chemistry, Physical
Zhoufeng Bian, Wenqi Zhong, Yang Yu, Zhigang Wang, Bo Jiang, Sibudjing Kawi
Summary: Catalysts of Ni supported on home-made mesoporous alumina exhibited high activity and stability in DRM, with NiAl2O4 spinel structure contributing to improved performance. Control of calcination temperature is crucial for catalyst properties.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Physical
Jiliang Yang, Xinkang Lu, Cui Han, Hui Liu, Dandan Gong, Liuye Mo, Qinhong Wei, Hengcong Tao, Sha Cui, Luhui Wang
Summary: Ni-based catalysts with glycine-assisted impregnation method were prepared and studied for the dry reforming of methane. The addition of glycine increased Ni dispersion and metal-support interaction, resulting in improved catalytic performance. Among the catalysts, Ni/SiO2-0.7G showed the best catalytic performance in the dry reforming of methane test.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Energy & Fuels
Anh Ngoc T. Cao, Cham Q. Pham, Tung M. Nguyen, Thuan Van Tran, Pham T. T. Phuong, Dai-Viet N. Vo
Summary: Dysprosium (Dy) promoted Co/Al2O3 catalysts with different Dy loadings were synthesized and found to enhance the basicity and activity of the catalysts for methane dry reforming. The addition of Dy reduced the crystallite size of Co3O4, resulting in better metal dispersion and higher catalytic performance. The optimal Dy loading was found to be 0.3 wt%, achieving the highest CH4 conversion and H-2 and CO yields.
Article
Energy & Fuels
Zongpeng Zou, Tao Zhang, Li Lv, Wenxiang Tang, Guoquan Zhang, Raju Kumar Gupta, Yan Wang, Shengwei Tang
Summary: Catalytic reforming for hydrogen production is important for sustainable energy, but coking is a challenge for industrialization. The key is to balance the formation rate of *C and *O. A novel preparation strategy of Ni-Co nano alloy catalysts was proposed, leading to highly dispersed nanoparticles. The bimetallic 5Ni5Co/SiO2 nano alloy catalyst showed the best catalytic activity, with stable performance and improved anti-coking properties.
Article
Chemistry, Physical
Meijia Li, Siyuan Fang, Yun Hang Hu
Summary: The study revealed a self-stabilization mechanism of Ni/Al2O3 catalysts in DRM for the first time, which effectively mitigates fast deactivation caused by coking and formation of nickel aluminate. This approach not only highlights the importance of an isolation layer for protecting the catalyst from deactivation, but also provides a novel and efficient self-stabilization method for catalytic DRM.
