Dry reforming of methane: Effect of different calcination temperatures of Al 2 O 3 and Mg‐Al 2 O 3 supports on Ni catalysts

2021 ◽  
Author(s):  
Rodolfo Andrade Schaffner ◽  
Carine Aline Schwengber ◽  
Rafaela Luisa Kowalski ◽  
Natalie Souto Gonçalves Assis ◽  
Roberta Carolina Pelissari Rizzo Domingues ◽  
...  
Keyword(s):  
Dry Reforming ◽  
Dry Reforming Of Methane ◽  
Ni Catalysts ◽  
Calcination Temperatures

scholarly journals Stabilities of zeolite-supported Ni catalysts for dry reforming of methane

2013 ◽  
Vol 34 (4) ◽  
pp. 764-768 ◽  
Author(s):  
Anis H FAKEEHA ◽  
Wasim U. KHAN ◽  
Ahmed S. AL-FATESH ◽  
Ahmed E. ABASAEED
Keyword(s):  
Dry Reforming ◽  
Dry Reforming Of Methane ◽  
Ni Catalysts ◽  
Supported Ni Catalysts ◽  
Supported Ni

High performance Ni catalysts prepared by freeze drying for efficient dry reforming of methane

2020 ◽  
Vol 275 ◽  
pp. 119109 ◽  
Author(s):  
Jijiang Huang ◽  
Yong Yan ◽  
Syed Saqline ◽  
Wen Liu ◽  
Bin Liu
Keyword(s):  
High Performance ◽  
Freeze Drying ◽  
Dry Reforming ◽  
Dry Reforming Of Methane ◽  
Ni Catalysts

Natural clay-based Ni-catalysts for dry reforming of methane at moderate temperatures

2018 ◽  
Vol 306 ◽  
pp. 51-57 ◽  
Author(s):  
Hongrui Liu ◽  
Lu Yao ◽  
Haithem Bel Hadj Taief ◽  
Mourad Benzina ◽  
Patrick Da Costa ◽  
...  
Keyword(s):  
Dry Reforming ◽  
Dry Reforming Of Methane ◽  
Natural Clay ◽  
Ni Catalysts

scholarly journals Biogas Conversion to Syngas Using Advanced Ni-Promoted Pyrochlore Catalysts: Effect of the CH4/CO2 Ratio

2021 ◽  
Vol 9 ◽  
Author(s):  
Estelle le Saché ◽  
Andrea Alvarez Moreno ◽  
Tomas Ramirez Reina
Keyword(s):  
Carbon Deposition ◽  
Pyrochlore Structure ◽  
Dry Reforming ◽  
Dry Reforming Of Methane ◽  
Waste Biomass ◽  
Ni Catalysts ◽  
Biogas Upgrading ◽  
Long Term Stability ◽  
Reported Data

Biogas is defined as the mixture of CH4 and CO2 produced by the anaerobic digestion of biomass. This particular mixture can be transformed in high valuable intermediates such as syngas through a process known as dry reforming (DRM). The reaction involved is highly endothermic, and catalysts capable to endure carbon deposition and metal particle sintering are required. Ni-pyrochlore catalysts have shown outstanding results in the DRM. However, most reported data deals with CH4/CO2 stoichiometric ratios resulting is a very narrow picture of the overall biogas upgrading via DRM. Therefore, this study explores the performance of an optimized Ni-doped pyrochlore, and Ni-impregnated pyrochlore catalysts in the dry reforming of methane, under different CH4/CO2 ratios, in order to simulate various representatives waste biomass feedstocks. Long-term stability tests showed that the ratio CH4/CO2 in the feed gas stream has an important influence in the catalysts' deactivation. Ni doped pyrochlore catalyst, presents less deactivation than the Ni-impregnated pyrochlore. However, biogas mixtures with a CH4 content higher than 60%, lead to a stronger deactivation in both Ni-catalysts. These results were in agreement with the thermogravimetric analysis (TGA) of the post reacted samples that showed a very limited carbon formation when using biogas mixtures with CH4 content <60%, but CH4/CO2 ratios higher than 1.25 lead to an evident carbon deposition. TGA analysis of the post reacted Ni impregnated pyrochlore, showed the highest amount of carbon deposited, even with lower stoichiometric CH4/CO2 ratios. The later result indicates that stabilization of Ni in the pyrochlore structure is vital, in order to enhance the coke resistance of this type of catalysts.

scholarly journals Advantages of Yolk Shell Catalysts for the DRM: A Comparison of Ni/ZnO@SiO2 vs. Ni/CeO2 and Ni/Al2O3

Chemistry ◽  
2018 ◽  
Vol 1 (1) ◽  
pp. 3-16 ◽  
Author(s):  
Cameron Price ◽  
Emily Earles ◽  
Laura Pastor-Pérez ◽  
Jian Liu ◽  
Tomas Reina
Keyword(s):  
Supported Catalysts ◽  
Catalytic Performance ◽  
Dry Reforming ◽  
Dry Reforming Of Methane ◽  
Carbon Formation ◽  
Ni Catalysts ◽  
Carbonaceous Deposits ◽  
Different Temperatures ◽  
Encapsulation Process ◽  
Co2 Recycling

Encapsulation of metal nanoparticles is a leading technique used to inhibit the main deactivation mechanisms in dry reforming of methane reaction (DRM): Carbon formation and Sintering. Ni catalysts (15%) supported on alumina (Al2O3) and ceria (CeO2) have shown they are no exception to this analysis. The alumina supported catalysts experienced graphitic carbonaceous deposits, whilst the ceria showed considerable sintering over 15 h of DRM reaction. The effect of encapsulation compared to that of the performance of uncoated catalysts for DRM reaction has been examined at different temperatures, before conducting longer stability tests. The encapsulation of Ni/ZnO cores in silica (SiO2) leads to advantageous conversion of both CO2 and CH4 at high temperatures compared to its uncoated alternatives. This work showcases the significance of the encapsulation process and its overall effects on the catalytic performance in chemical CO2 recycling via DRM.

scholarly journals The effect of La on the hydrotalcite derived Ni catalysts for dry reforming of methane

2017 ◽  
Vol 142 ◽  
pp. 3721-3726 ◽  
Author(s):  
Dori Yosef Kalai ◽  
Kristian Stangeland ◽  
Hailong Li ◽  
Zhixin Yu
Keyword(s):  
Dry Reforming ◽  
Dry Reforming Of Methane ◽  
Ni Catalysts

Low temperature dry reforming of methane over plasmonic Ni photocatalysts under visible light irradiation

2019 ◽  
Vol 3 (11) ◽  
pp. 2968-2971 ◽  
Author(s):  
Daichi Takami ◽  
Yoji Ito ◽  
Satoru Kawaharasaki ◽  
Akira Yamamoto ◽  
Hisao Yoshida
Keyword(s):  
Low Temperature ◽  
Visible Light ◽  
Visible Light Irradiation ◽  
Dry Reforming ◽  
Light Irradiation ◽  
Dry Reforming Of Methane ◽  
Ni Catalysts

CO2 reforming with CH4 proceeded at a low temperature (473 K) to form syngas over plasmonic Ni catalysts under visible light.

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