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Influence of Mg‐promoted Ni‐based Catalyst Supported on Coconut Shell Carbon for CO 2 Methanation
Author(s) -
Li Xinkai,
Wang Yuqi,
Zhang Guoxia,
Sun Wen,
Bai Yukun,
Zheng Lan,
Han Xiaolong,
Wu Le
Publication year - 2019
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201803369
Subject(s) - methanation , catalysis , carbon fibers , atmospheric pressure , magnesium , nickel , materials science , nuclear chemistry , activated carbon , selectivity , ambient pressure , chemical engineering , chemistry , inorganic chemistry , metallurgy , organic chemistry , composite material , composite number , oceanography , physics , adsorption , engineering , thermodynamics , geology
This study aims to investigate the conversion of CO 2 and H 2 into CH 4 under atmospheric pressure. A series of nickel‐based catalysts using coconut shell carbon were prepared by co‐impregnation method, and the coconut shell carbon carrier in the CO 2 methanation demonstrated its advantage by comparison with the alumina and zirconia supports. Magnesium modified Ni/coconut shell carbon catalysts were studied to explore the catalytic performances, the morphology and properties of all catalysts were characterized by CO 2 ‐TPD, XRD, SEM, BET, FTIR, TEM and H 2 ‐TPR. Catalytic performances were experimentally evaluated in a fixed bed tubular reactor under atmospheric pressure, WHSV of 10,000 mlh −1 g −1 , and H 2 /CO 2 molar ratio of 4/1. Experimental results indicated magnesium modified Ni‐Mg 0.26 /coconut shell carbon catalyst has outstanding activity and excellent stability, which performed the highest CO 2 conversion (90.10%) and CH 4 selectivity (99.22%) at 450 °C. The catalytic activity of Ni‐Mg 0.26 / coconut shell carbon experienced 50 h stability evaluation, and no evident decrease was found during the methanation process.