Catalytic performance improvement of volatile organic compounds oxidation over MnO_(x) and GdMnO_(3) composite oxides from spent lithium-ion batteries:Effect of acid treatment  

作　　者：Mingming Guo Lizhong Liu Jia-nan Gu Hongbo Zhang Xin Min Jianxing Liang Jinping Jia Kan Li Tonghua Sun 

机构地区：[1]School of Environmental Science and Engineering,Shanghai Jiao Tong University,Shanghai 200240,China [2]School of Chemistry and Chemical Engineering,Nantong University,Nantong 226019,China [3]School of Chemical and Environmental Engineering,Shanghai Institute of Technology,Shanghai 201418,China [4]Shanghai Institute of Pollution Control and Ecology Security,Shanghai 200092,China [5]Shanghai Engineering Research Center of SolidWaste Treatment and Resource Recovery,Shanghai 200240,China

出　　处：《Chinese Journal of Chemical Engineering》2021年第6期278-288,共11页中国化学工程学报（英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant numbers 21876107,21607103)。

摘　　要：In this work,cathode materials of spent lithium-ion ternary batteries are recovered and used as metal precursor to prepare multi-metal oxides MnO_(x)(SY)and GdMnO_(3)(SY)via combustion method and sol-gel method,respectively.Furthermore,a series of MnO_(x)(SY)-n and GdMnO_(3)(SY)-n(n=0.05,0.10,1.00,4.00,n represents the dilute HNO_(3) concentration)catalysts are fabricated by acid treatment of MnO_(x)(SY)and GdMnO_(3)(SY)samples and catalytic activities of oxygenated VOCs oxidation over all the prepared catalysts are investigated.Catalytic evaluation results show that acid-treated MnO_(x)(SY)-0.10 and GdMnO_(3)(SY)-0.05 samples perform the optimum VOCs removal efficiency respectively,which may be attributed to their obvious enhancement of physicochemical properties.In detail,Mn O_(x)(SY)-0.10 and GdMnO_(3)(SY)-0.05 samples exhibit the larger specific surface area,bigger amount of surface high-valence metal ions(Mn^(4+),Co^(3+),Ni^(3+)),more abundant adsorbed oxygen species and better low-temperature reducibility,which can play a crucial role in the significant improvement of VOCs oxidation.In situ DRIFTS results imply that the possible main intermediates are-OCO,-COO and-C-O species produced during VOCs oxidation.Possible by-products are further determined via TD/GC-MS analysis.

关 键 词：Spent lithium-ions batteries Acid treatment Multi manganese-based oxides and perovskite VOCs oxidation 

分 类 号：X701[环境科学与工程—环境工程] TQ426[化学工程]