Article
Energy & Fuels
Fatemeh Zarei-Jelyani, Fatemeh Salahi, Mohammad Farsi, Mohammad Reza Rahimpour
Summary: Steam methane reforming is an important reaction for producing environmentally-friendly hydrogen from methane. In this study, Ni-Co co-impregnated catalysts were synthesized using a hollow sphere alumina support, leading to improved stability and performance. Among the catalysts tested, Ni-2-Co-1/H-Al2O3 showed the highest methane conversion and hydrogen yield at 700 ℃.
Article
Chemistry, Applied
Paola Riani, Gabriella Garbarino, Tullio Cavattoni, Guido Busca
Summary: Two Co/SiO2 catalysts exhibit different catalytic behaviors in CO2 methanation and reverse water gas shift reactions, with carbon nanotubes produced not affecting the catalyst activity.
Article
Chemistry, Physical
Vildan Aker, Nezihe Ayas
Summary: Ethanol steam reforming (ESR) is a promising technology for hydrogen production, and the study focuses on the influence of cobalt loading and ESR conditions on H2 selectivity and catalytic stability. Ni-Co/Al2O3 (5 wt% Co) catalyst exhibited the best performance with small metal crystallite size, high surface area, and high catalytic activity. Optimal conditions for 100% ethanol conversion and maximum H2 selectivity were found to be 600°C, 0.05 L/gcat.h, and S:C molar ratio of 12:1. The Ni-Co interaction was found to affect the catalytic activity, and the stability test showed minimal coke deposition.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Physical
Sujoy Bepari, Joy Jyoti Sarkar, Narayan C. Pradhan
Summary: In this study, olivine was used as a support for nickel catalyst in the steam reforming of ethanol. Among different catalysts, the 5% Ni on olivine catalyst showed the highest hydrogen yield and ethanol conversion. The catalyst activity was analyzed by varying temperature, ethanol to water molar ratio, and space-time. The optimal conditions for the ethanol steam reforming reaction were found to be 550 degrees C, an ethanol to steam molar ratio of 1:10, and a space-time of 7.94 kg cat h/kmol ethanol.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Review
Chemistry, Physical
Kai Shi, Xia An, Xu Wu, Xianmei Xie
Summary: This review summarizes the reaction mechanism and carbon deposition process of ethanol steam reforming (ESR), and proposes an anti-coking strategy, providing possibilities for the design of new and stable catalysts.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Energy & Fuels
Mingqiang Chen, Xiaoyang Feng, Yishuang Wang, Defang Liang, Chang Li, Zhonglian Yang, Jun Wang
Summary: In this study, attapulgite-based MCM-41 (AM) was synthesized using attapulgite as a silicon source, and AM-supported Ni/Ce/Zr catalysts were manufactured by sol-gel assisted impregnation method. It was found that the optimal Ce-Zr additives and calcination temperature could enhance the electronic interaction among Ni/Ce/Zr components, resulting in the highest ethanol conversion rate and stability of the catalyst. This study provides a new opportunity for the preparation of efficient and low-cost AM-supported Ni/Ce/Zr catalysts for ethanol steam reforming.
Article
Chemistry, Physical
J. F. Da Costa-Serra, A. Miralles-Martinez, B. Garcia-Munoz, S. Maestro-Cuadrado, A. Chica
Summary: Ni and Co catalysts supported on ITQ-6 zeolite were synthesized and evaluated for ethanol steam reforming. Co/ITQ-6 showed higher conversion and hydrogen production than Ni/ITQ-6, attributed to smaller cobalt particle size. Co/ITQ-6 also exhibited lower selectivity for by-products and higher stability. Rating: 8/10.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Multidisciplinary
Jorge Tovar-Rodriguez, Emiliano Fratini, Piero Baglioni, Carlo Ferrari, Jose Antonio de los Reyes-heredia, Yonatan Ramirez-Hernandez, Ignacio Rene Galindo-Esquivel
Summary: Solvothermal synthesis of mesoporous materials based on amphiphilic molecules as structure-directing agents can be enhanced using non-conventional technologies for stirring and thermal activation. Here, we disclose a green synthesis approach for the preparation of cerium-modified hexagonally ordered silica sieves. Ultrasound micromixing enabled us to obtain well-dispersed Ce in the self-assembled silica network and yielded ordered materials with high cerium content (Ce/Si molar ratio = 0.08). Microwave dielectric heating, applied by an innovative open-end coaxial antenna, was used to reduce the overall hydrothermal synthesis time and to improve the surface area and textural properties. These mesoporous materials were used as a Ni catalyst support (10 wt.% metal loading) for the ethanol steam reforming reaction. The new catalysts featured complete ethanol conversion, high H-2 selectivity (65%) and better stability, compared to the same catalyst prepared with magnetic stirring and conventional heating. The Ce-promoted silica sieves offered a suitable support for the controlled growth of nanocarbon that does not result in catalyst deactivation or poisoning after 6 h on stream.
Review
Chemistry, Physical
S. Anil, S. Indraja, R. Singh, S. Appari, B. Roy
Summary: This article examines the impact of modifying nickel with various noble and non-noble metals and altering supports with different metal oxides on ethanol steam reforming (ESR) reaction. It explores the reaction mechanisms and thermodynamics, emphasizing the importance of catalyst morphology, active metal promoter, and support modifier in hydrogen production and carbon deposition prevention.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Energy & Fuels
Fatemeh Salahi, Fatemeh Zarei-Jelyani, Maryam Meshksar, Mohammad Farsi, Mohammad Reza Rahimpour
Summary: This study focuses on the application of Y-promoted Ni-based catalysts supported on bulk and hollow Al2O3 supports in the steam reforming of methane process. Various characterizing techniques were employed to analyze the catalysts. The 20Ni-3.0Y/HAl catalyst showed the highest methane conversion, hydrogen yield, and H2/CO molar ratio at 700 degrees C, possibly due to the larger surface area of the hollow alumina support compared to the bulk one.
Article
Chemistry, Physical
Hongrui Liu, Hongshen Li, Shizhong Li
Summary: The performance of hydrocalumite derived catalysts prepared by co-precipitation in ethanol steam reforming was investigated. It was found that the catalysts with 15 wt% nickel content exhibited the best performance, with ethanol conversion and hydrogen yield reaching 100% and 85% respectively.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Materials Science, Multidisciplinary
Tamara S. Moraes, Vanderlei S. Bergamaschi, Joao C. Ferreira, Estevam Spinace
Summary: A core-shell catalyst was tested for ethanol steam reforming reaction under low-temperature conditions, showing excellent activity and high coke inhibition capacity compared to other catalysts.
JOURNAL OF MATERIALS SCIENCE
(2022)
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
Engineering, Environmental
Maria Cortazar, Shuzhuang Sun, Chunfei Wu, Laura Santamaria, Leire Olazar, Enara Fernandez, Maite Artetxe, Gartzen Lopez, Martin Olazar
Summary: The study showed that temperature significantly impacts the performance of the catalyst, with higher temperatures enhancing H2 production in ethanol steam reforming reactions but reducing the catalyst's CO2 capture capacity.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Energy & Fuels
Dan Zhou, Zhiyuan Li, Yaoqi Deng, Chengxiong Dang, Weiquan Cai
Summary: Sorption-enhanced biogas steam reforming with a Pb-modified Ni-CaO catalyst shows excellent stability and can continuously produce high-purity hydrogen.