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    Hydrogen production via CO2-CH4 reforming over cobalt-supported mesoporous alumina: A kinetic evaluation

    Year: 2021

    Journal: Int. J. Hydrog. Energy, Volume 46, JUL 13, page 24742–24753

    Authors: Bahari, Mahadi B.; Setiabudi, Herma Dina; Nguyen, Trinh Duy; Jalil, Aishah Abdul; Ainirazali, Nurul; Vo, Dai-Viet N.

    Organizations: Universiti Malaysia Pahang via the Doctoral Research Scheme (DRS) Award; Universiti Malaysia Pahang via the UMP Postgraduate Research Grants Scheme (PGRS) [PGRS180366]

    Keywords: Mesoporous alumina; CO2-CH4 reforming; Cobalt; Syngas; Kinetic analysis

    The performance of cobalt supported on mesoporous alumina (MA) under the influence of reaction temperature (923 K-1073 K) and reactant partial pressure (10 kPa-40 kPa) for CO2-CH4 reforming was executed by using a tubular fixed-bed reactor. 10%Co/MA exhibited great catalytic performance (X-CH4 = 70.9%, X-CO2 = 71.7% and D-a = 1.3%), credited to the well dispersion of Co within pore MA, strong metal-support interaction, and MA confinement ability. Based on Langmuir-Hinshelwood kinetic analysis, the dissociative adsorption of both reactants on a single Co active site was selected for this study. The lower value of activation energy (28.9 kJ mol(-1)) suggested that Co particles were finely scattered on the MA surface. Regardless of carbon types, the amount of coke accumulated on the spent 10% Co/MA within 8 h of CO2-CH4 reforming was inhibited due to fine Co distribution inside MA structure, as well as lessened with the raise of reforming temperature from 923 to 1073 K due to improvement in reverse Boudouard reaction. (C) 2020 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
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