Effect of de-alkalized red mud on the distribution of catalytic pyrolysis products from food waste
LIU Liang1, ZENG Hong-liang1, QING Meng-xia1, HE Zi-hang1, WU Jia-jun1, KANG Xiang-jing1, XIANG Jun2, LIU Yi-fan3
1. School of Energy and Power Engineering, Changsha University of Science and Technology, Changsha 410114, China; 2. State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, Wuhan 430074, China; 3. Power China Real Estate Group Ltd, Beijing 100097, China
Abstract:In this paper, the effects of de-alkalized red mud on the distribution of food waste pyrolysis products at different pyrolysis temperatures were investigated using a fixed bed reactor, Gas Chromatography-Mass Spectrometry (GC-MS), Fluorescence Spectrophotometry (UV-F), and In-Situ Infrared (In-situ DRIFTS). The results showed that under the same pyrolysis temperature, the formation of pyrolysis gas was inhibited and the production of pyrolysis oil was promoted, with the highest yield of 39.46% at 450℃, by de-alkalized red mud. The pyrolysis oil was mainly dominated by fatty acids, N compounds, and esters. Not only was the decomposition of triglycerides promoted to produce long-chain carboxylic acids but also the cleavage of proteins was promoted to produce aromatic proteins by de-alkalized red mud, which led to the increase of acid content and deepening of the degree of aromatization in the pyrolysis oil. Meanwhile, the significant growth of carboxylic acid functional groups and C≡N absorption peaks in pyrolysis coke further confirmed that the de-alkalized red mud could promote the production of acids and N compounds in pyrolysis oil.
刘亮, 曾宏亮, 卿梦霞, 贺梓航, 吴佳俊, 康向京, 向军, 刘一帆. 脱碱赤泥对餐厨垃圾催化热解产物分布的影响[J]. 中国环境科学, 2024, 44(10): 5678-5686.
LIU Liang, ZENG Hong-liang, QING Meng-xia, HE Zi-hang, WU Jia-jun, KANG Xiang-jing, XIANG Jun, LIU Yi-fan. Effect of de-alkalized red mud on the distribution of catalytic pyrolysis products from food waste. CHINA ENVIRONMENTAL SCIENCECE, 2024, 44(10): 5678-5686.
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