Investigation of synergistic pyrolysis effects and product distribution from Co-Pyrolysis of municipal sludge and peanut shells
GUO Shi-peng1, WANG Yun-gang1, BAI Yan-yuan1, XIU Hao-ran1, ZOU Li1, LI Fei-xiang2, ZHAO Qin-xin1
1. Key Laboratory of Thermo-Fluid Science and Engineering, Ministry of Education, Xi'an Jiaotong University, Xi'an 710049, China; 2. Hubei Special Equipment Inspection and Testing Institute, Wuhan 430077, China
Abstract：The co-pyrolysis of biomass/sewage sludge was demonstrated to facilitate efficient resource utilization, harmless treatment, and sludge volume reduction. Due to the complexity of co-pyrolysis reactions, it was deemed essential that the thermodynamic properties and product distribution of this process be systematically evaluated. The pyrolysis characteristics, synergistic effects, and product distribution of municipal sludge-peanut shell mixtures were investigated using thermogravimetric analysis and a fixed-bed reactor. It was observed that significant synergistic interactions were exhibited during municipal sludge/peanut shell co-pyrolysis, primarily during the volatile release stage, where the synergistic effect was found to accelerate mixture pyrolysis. When the conversion rate (α) was below 0.7, the apparent activation energy was progressively reduced with increasing sludge mass ratio (SMR). Conversely, when α exceeded 0.7, the apparent activation energy sharply increased with higher SMR. The gas yield was enhanced with elevated pyrolysis temperatures, while liquid and solid yields were significantly diminished. Elevated temperatures were also shown to promote H2 and CH4 generation. Product yields and synergistic effects were strongly influenced by SMR, with the most pronounced co-pyrolysis synergy observed at an SMR of 40wt.%.
郭世鹏, 王云刚, 白彦渊, 修浩然, 邹立, 李飞翔, 赵钦新. 市政污泥与花生壳共热解协同效应及产物分布研究[J]. 中国环境科学, 2025, 45(4): 2016-2027.
GUO Shi-peng, WANG Yun-gang, BAI Yan-yuan, XIU Hao-ran, ZOU Li, LI Fei-xiang, ZHAO Qin-xin. Investigation of synergistic pyrolysis effects and product distribution from Co-Pyrolysis of municipal sludge and peanut shells. CHINA ENVIRONMENTAL SCIENCECE, 2025, 45(4): 2016-2027.
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