Revisiting the mitigation of coke formation:Synergism between support&promoters'role toward robust yield in the CO_(2)reformation of methane  

作　　者：Zahra Taherian Vahid Shahed Gharahshiran Xiaoxuan Wei Alireza Khataee Yeojoon Yoon Yasin Orooji 

机构地区：[1]Research Laboratory of Advanced Water and Wastewater Treatment Processes,Department of Applied Chemistry,Faculty of Chemistry,University of Tabriz,51666-16471,Tabriz,Iran [2]Department of Chemical and Biochemical Engineering,Western University,1150 Richmond St,London,ON,N6A 3K7,Canada [3]College of Geography and Environmental Sciences,Zhejiang Normal University,321004,Jinhua,China [4]Department of Chemical Engineering,Istanbul Technical University,Maslak,34469 Istanbul,Turkey [5]Department of Environmental and Energy Engineering,Yonsei University,Wonju,Republic of Korea

出　　处：《Nano Materials Science》2024年第5期536-547,共12页纳米材料科学（英文版）

基　　金：supports rendered by Zhejiang Normal University(Grant No.YS304221928);Iran National Science Foundation.No.:4002219;Yonsei University Mirae Campus.

摘　　要：CO_(2)reformation of methane(CRM)and CO_(2)methanation are two interconnected processes with significant implications for greenhouse gas reduction and sustainable energy production for industrial purposes.While Nibased catalysis suffers from poor stability due to coke formation or sintering,we report a super stable remedy.The active sites of mesoporous MgO were loaded using wet impregnation.The incorporation of Ni and promoters altered the physical features of the catalysts.Sm–Ni/MgO showed the smallest crystallite size,specific surface area,and pore volume.The Sm–Ni/MgO catalyst was selected as the most suitable candidate for CRM,with 82%CH4 and H2/CO ratio of approximately 100%and also for CO_(2)methanation with the conversion of carbon dioxide(82%)and the selectivity toward methane reaches 100%at temperatures above 300ᵒC.Furthermore,the Sm–Ni/MgO catalyst was stable for 900 min of continuous reaction,without significant carbon deposition.This stability was largely due to the high oxygen mobility on the catalyst surface in the presence of Sm.Overall,we demonstrated the efficacy of using promoted Ni catalysts supported by mesoporous magnesia for the improved reformation of greenhouse gases.

关 键 词：Mesoporous MgO Dry reforming CO_(2)methanation Oxygen vacancies PROMOTER 

分 类 号：O64[理学—物理化学]