Enhancement of magnesium aluminate-based nickel and cobalt nanostructured catalysts with iron for improved performance in carbon dioxide methanation  

作　　者：Mohammad Hosein Rezazadeh Yalda Ramezani Fereshteh Meshkani 

机构地区：[1]Catalyst and Advanced Materials Research Laboratory,Chemical Engineering Department,Faculty of Engineering,University of Kashan,Kashan,Iran [2]Department of Chemical and Biomolecular Engineering,Ohio University,USA [3]Department of Chemical and Petroleum Engineering,University of Calgary,Calgary,Alberta,Canada

出　　处：《Progress in Natural Science:Materials International》2024年第5期921-932,共12页自然科学进展·国际材料(英文版)

基　　金：The University of Kashan (Grant No. 158426/16) supports this research

摘　　要：This study investigates the performance of Ni and Co catalysts based on Fe-promoted MgAl_(2)O_(4)for CO_(2)methanation, which is a crucial step in mitigating environmental carbon dioxide levels. The MgAl_(2)O_(4)support was modified with various Fe loading(5, 10, and 15 wt%) and fabricated via a novel coprecipitation technique with the help of ultrasonic waves and chosen as support for 15 wt% Ni and Co active phases. Examination of the BET surface properties of the catalysts showed an increase in surface area in the range of 54–82 m^(2)/g and 73–85 m^(2)/g with an increasing Fe loading for Ni and Co catalysts, respectively. Among the Ni-based catalysts, the 15Ni/10FeMgAl_(2)O_(4)specimen exhibited the best performance(with a 73.31 % CO_(2)conversion and 95.61 % selectivity rate) and remarkable lifetime during 10 h at 400℃ due to the better reducibility and the increase in hydrogen consumption. However, a rise in Fe amount to 15 wt% led to a reduction in the CO_(2)conversion to 34.43 %. The catalytic outcomes also demonstrated that the presence of Fe in Co/MgAl_(2)O_(4)catalysts negatively affects catalytic performance. The unpromoted Co/MgAl_(2)O_(4)sample demonstrated the best performance, achieving a conversion rate of 52.41 % at 350℃.

关 键 词：CO_(2)-Methanation Fe promoter Ni-based promoted catalysts MgAl_(2)O_(4)base Nanoparticles 

分 类 号：TQ426[化学工程]