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.
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, NUIST, Nanjing 210044, China.
Bioresour Technol. 2021 Mar;323:124584. doi: 10.1016/j.biortech.2020.124584. Epub 2020 Dec 28.
This research work studied the pyrolysis characteristics of main biomass components (i.e. cellulose, lignin) in the presence of the spent Li-ion battery cathode (BC) enriched in transition-metals (e.g., Ni, Co). The BC with a good thermostability even at > 700 °C could be used as a catalyst for biomass conversion. The addition methods of BC to biomass such as one-step (directly mixing) and two-step (impregnation-drying) were comparatively studied. The two-step method had a better catalytic effect in biomass pyrolysis, contributing to the reduction of decomposition temperature and activation energy. Significantly, the two-step method had a strong catalytic effect in reducing the content of cellulose-derived sugars and increasing the content of ketones via dehydration and decarboxylation. In addition, the BC used by the two-step method had a high potential for biomass pyrolysis or gasification in promoting the catalytic cracking (i.e. H-transfer) of lignin-derived phenols (tar surrogates) to hydrocarbons and aliphatics (e.g., ketones).
本研究工作研究了在富含过渡金属（如镍、钴）的废锂离子电池阴极（BC）存在下，主要生物质成分（即纤维素、木质素）的热解特性。BC 具有良好的热稳定性，即使在 >700°C 下也能用作生物质转化的催化剂。比较了 BC 添加到生物质的两种方法，如一步法（直接混合）和两步法（浸渍-干燥）。两步法在生物质热解中具有更好的催化效果，有助于降低分解温度和活化能。值得注意的是，两步法在降低纤维素衍生糖的含量和通过脱水和脱羧增加酮的含量方面具有很强的催化作用。此外，两步法中使用的 BC 具有很高的生物质热解或气化潜力，可促进木质素衍生酚（焦油替代品）的催化裂化（即 H-转移）为烃类和脂肪族化合物（如酮）。
