Contribution of Oxide Supports in Nickel-Based Catalytic Elimination of Greenhouse Gases and Generation of Syngas

Wasim Ullah Khan, Mohammad Rizwan Khan, Rosa Busquets and Naushad Ahmad
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Wasim Ullah Khan: Chemical and Process Engineering, College of Engineering, University of Canterbury, Christchurch 8041, New Zealand
Mohammad Rizwan Khan: Department of Chemistry, College of Science, King Saud University, P.O. Box. 2454, Riyadh 11451, Saudi Arabia
Rosa Busquets: School of Life Sciences, Pharmacy and Chemistry, Kingston University London, Penrhyn Road, Kingston Upon Thames KTI 2EE, UK
Naushad Ahmad: Department of Chemistry, College of Science, King Saud University, P.O. Box. 2454, Riyadh 11451, Saudi Arabia

Energies, 2021, vol. 14, issue 21, 1-12

Abstract: Carbon dioxide and/or dry methane reforming serves as an effective pathway to mitigate these greenhouse gases. This work evaluates different oxide supports including alumina, Y-zeolite and H-ZSM-5 zeolite for the catalysis of dry reforming methane with Nickel (Ni). The composite catalysts were prepared by impregnating the supports with Ni (5%) and followed by calcination. The zeolite supported catalysts exhibited more reducibility and basicity compared to the alumina supported catalysts, this was assessed with temperature programmed reduction using hydrogen and desorption using carbon dioxide. The catalytic activity, in terms of CH 4 conversion, indicated that 5 wt% Ni supported on alumina exhibited higher CH 4 conversion (80.5%) than when supported on Y-zeolite (71.8%) or H-ZSM-5 (78.5%). In contrast, the H-ZSM-5 catalyst led to higher CO 2 conversion (87.3%) than Y-zeolite (68.4%) and alumina (83.9%) supported catalysts. The stability tests for 9 h time-on-stream showed that Ni supported with H-ZSM-5 had less deactivation (just 2%) due to carbon deposition. The characterization of spent catalysts using temperature programmed oxidation (O 2 -TPO), X-ray diffraction (XRD) and thermo-gravimetric analysis (TGA) revealed that carbon deposition was a main cause of deactivation and that it occurred in the lowest degree on the Ni H-ZSM-5 catalyst.

Keywords: CO 2; CH 4; stability; H-ZSM-5; carbon deposition; greenhouse gas reduction (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2021
References: View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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