期刊
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
卷 46, 期 1, 页码 357-373出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2020.09.157
关键词
Ultrasonic spray pyrolysis; Nickel aluminate; Catalyst; Dry reforming of methane; Steam reforming of methane
(Ni,Co)Al2O4 mesoporous spinel particles with high specific surface area were synthesized in a single-step by ultrasonic spray pyrolysis at 1000 degrees C. Substituting Ni with Co increased catalyst stability, methane conversion values, and resistance against carbon deposition.
(Ni,Co)Al2O4 mesoporous spinel particles with a high specific surface area were synthesized in a single-step by ultrasonic spray pyrolysis at 1000 degrees C. After reduction, a uniform metal distribution was obtained on the support, which was used as a catalyst for dry and steam reforming of methane. Substituting Ni with Co resulted in a substantial increase in the specific surface area from 118 m(2)/g to 182 m(2)/g as a result of different decomposition paths that occurs for Ni and Co salts in the pyrolysis reactions. Results show that partial substitution of Ni with Co, between 20 and 50%, significantly increased the methane conversion values and improved the stability of the catalysts in the time on stream experiments. It also shows that partial substitution substantially improved the catalyst resistance against carbon deposition in the dry reforming process. The complete replacement of the cobalt with nickel in spinel structure caused a significant drop in catalytic properties. (C) 2020 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
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