Collaborative Innovation Center of Atmospheric Environment and Equipment Technology, Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control (AEMPC), School of Environmental Science and Engineering, Nanjing University of Information Science and Technology (NUIST), Nanjing, 210044, China.
Collaborative Innovation Center of Atmospheric Environment and Equipment Technology, Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control (AEMPC), School of Environmental Science and Engineering, Nanjing University of Information Science and Technology (NUIST), Nanjing, 210044, China.
J Environ Manage. 2022 Aug 1;315:115133. doi: 10.1016/j.jenvman.2022.115133. Epub 2022 Apr 27.
Waste cathode (BC) from spent lithium-ion battery (LIB) was preliminarily studied for the catalytic pyrolysis of chitin biomass using thermogravimetric and pyrolysis-gas chromatography/mass spectrometry analysis. Compared with the dry-mixing method (BC1), the wet-impregnation method (BC2) significantly increased the decomposition rate of chitin pyrolysis and decreased the apparent activation energy from 85 kJ/mol to 76 kJ/mol. BC2 had a superior catalytic effect on the conversion of heavy components into light fractions. In particular, the selectivities for acetamides and acetonitrile were improved. Furthermore, BC2 enhanced the cleavage of glucosidic, C-O, and C-C bonds, thereby improving the thermolysis of chitin to acetamido acetaldehyde. The production of acetamides, acetonitriles, and other light components (e.g., ketones) was further enhanced via deoxygenation and hydrogenation reactions. Additionally, the selectivity of N-heterocycles (pyridine and pyrrole) and their derivatives (tar-N surrogates) decreased, indicating that tar was significantly reduced during the catalytic pyrolysis and gasification of chitin biomass.
废弃的锂离子电池（LIB）废阴极（BC）初步用于甲壳素生物质的催化热解，使用热重和热解-气相色谱/质谱分析。与干混法（BC1）相比，湿浸渍法（BC2）显著提高了甲壳素热解的分解速率，并将表观活化能从 85 kJ/mol 降低至 76 kJ/mol。BC2 对将重质成分转化为轻质馏分具有更好的催化效果。特别是，乙酰胺和乙腈的选择性得到提高。此外，BC2 增强了糖苷、C-O 和 C-C 键的断裂，从而促进了甲壳素向乙酰胺基乙醛的热解。通过脱氧和加氢反应，进一步提高了乙酰胺、乙腈和其他轻质组分（如酮）的产率。此外，氮杂环（吡啶和吡咯）及其衍生物（焦油-N 替代物）的选择性降低，表明在甲壳素生物质的催化热解和气化过程中焦油明显减少。
