Enhancing the performance of spinel La-doped CoFe_(2)O_(4)oxygen carriers for chemical looping hydrogen generation  

作　　者：Weifeng Song Jingli Wu Jianqing Li Zhiqi Wang Tao He Wenqing Chen Deshuai Sun Jinhu Wu 

机构地区：[1]College of Chemistry and Chemical Engineering,Qingdao University,Qingdao 266071,China [2]Key Laboratory of Biofuels,Qingdao Institute of Bioenergy and Bioprocess Technology,Chinese Academy of Sciences,189 Songling Road,Qingdao 266101,China [3]Shandong Energy Institute,189 Songling Road,Qingdao 266101,China [4]Qingdao New Energy Shandong Laboratory,189 Songling Road,Qingdao 266101,China

出　　处：《Green Carbon》2024年第4期393-400,共8页绿碳(英文)

基　　金：supported by the National Natural Science Foundation of China(No.22108287,22178366);the Natural Science Foundation of Shandong Province(ZR2020MB138).

摘　　要：Chemical-looping hydrogen generation(CLHG)is a clean and efficient method for sustainable hydrogen production.The industrial advancement of the CLHG technology hinges on the development of highly active and selective oxygen carriers(OCs).In this study,the performances of three spinel OCs(ZnFe_(2)O_(4),CoFe_(2)O_(4),and NiFe_(2)O_(4))were investigated in a fixed-bed reactor.CoFe_(2)O_(4)demonstrated the best reactivity and highest hydrogen yield.In addition,doping CoFe_(2)O_(4)with varying amounts of La further improved its performance.The highest hydrogen yield(393 mL/g)was observed for CoFe_(2)O_(4)doped with 10%by mass of La.The characterization results indicated that La not only facilitated the formation of oxygen vacancies but also accelerated lattice oxygen transfer.Furthermore,an optimized La doping level was found to boost the crystallinity of the oxygen carrier,leading to improved cycling performance.The insights gained from probing the performance of La-doped CoFe_(2)O_(4)OCs are expected to contribute to the development of novel OCs for scaled-up CLHG technology.

关 键 词：Chemical looping Hydrogen generation Oxygen carrier SPINEL 

分 类 号：TG1[金属学及工艺—金属学]