Promotional removal of oxygenated VOC over manganese-based multi oxides from spent lithium-ions manganate batteries: Modification with Fe, Bi and Ce dopants

Mingming Guo; Kan Li; Hongbo Zhang; Xin Min; Jianxing Liang; Xiaofang Hu; Weimin Guo; Jinping Jia; Tonghua Sun

doi:10.1016/j.scitotenv.2020.139951

Promotional removal of oxygenated VOC over manganese-based multi oxides from spent lithium-ions manganate batteries: Modification with Fe, Bi and Ce dopants

Sci Total Environ. 2020 Oct 20:740:139951. doi: 10.1016/j.scitotenv.2020.139951. Epub 2020 Jun 11.

Authors

Mingming Guo¹, Kan Li², Hongbo Zhang³, Xin Min¹, Jianxing Liang¹, Xiaofang Hu⁴, Weimin Guo⁴, Jinping Jia², Tonghua Sun⁵

Affiliations

¹ School of Environmental Science and Engineering, Shanghai Jiao Tong University, 800 Dong Chuan Road, Shanghai 200240, PR China.
² School of Environmental Science and Engineering, Shanghai Jiao Tong University, 800 Dong Chuan Road, Shanghai 200240, PR China; Shanghai Institute of Pollution Control and Ecology Security, Shanghai 200092, PR China.
³ School of Chemical and Environmental Engineering, Shanghai Institute of Technology, Shanghai 201418, PR China.
⁴ Lab Center for the School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, PR China.
⁵ School of Environmental Science and Engineering, Shanghai Jiao Tong University, 800 Dong Chuan Road, Shanghai 200240, PR China; Shanghai Engineering Research Center of Solid Waste Treatment and Resource Recovery, Shanghai 200240, PR China. Electronic address: sunth@sjtu.edu.cn.

PMID: 32563871
DOI: 10.1016/j.scitotenv.2020.139951

Abstract

In this work, cathode materials of spent lithium-ions manganate batteries are recovered as the precursor of manganese-based oxides catalysts and furthermore, different amount of Fe, Bi, Ce are introduced to modify their properties. A series of MnOx(MS)-X Fe, MnOx(MS)-X Bi and MnOx(MS)-X Ce samples with crystal phase of Mn₅O₈ are synthesized using combustion method and then the catalytic behavior and physicochemical properties of prepared catalysts are investigated. Compared to binary MnOx-5% Fe, MnOx-15% Bi and MnOx-10% Ce samples, multi MnOx(MS)-5% Fe, MnOx(MS)-15 Bi and MnOx(MS)-10% Ce catalysts display enhanced catalytic performance significantly in the removal of oxygenated VOC, which could be attributed to larger specific surface area, higher concentration of surface active oxygen species and Mn⁴⁺ ions and better reducibility at low temperature. In-situ DRIFTS results imply that main oxygen-containing functional groups such as carbonyl (-C=O), carboxyl (-COO), hydroxyl (-OH) can be observed during VOC oxidation and by comparison, it can be found that gas-phase O₂ plays a crucial role in facilitating the further oxidation of by-products into CO₂. In addition, TD/GC-MS results point out that the main by-products are formaldehyde; 2-propanol, 1-methoxy-; ethanol, 2-methoxy-, acetate; 2-ethoxyethyl acetate; acetic acid during VOC oxidation.

Keywords: Fe, Bi, Ce dopants; In-situ DRIFTS; Multi metal oxides; Oxygenated VOC; Spent lithium-ions batteries; TD/GC–MS.