https://orcid.org/0000-0002-6154-3039
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ABSTRACT
Pyrolysis is one of the very popular techniques for the disposal of municipal solid waste (MSW), while most studies on the MSW pyrolysis only focuses on either the single-component MSW or those composed of a small number of components. In the present study, the mixed wastes from a waste treatment plant were used as the experimental material. The thermogravimetric analysis (TGA) and differential scanning calorimetry measurements of the pyrolysis process were carried out, and the pyrolysis process were divided into three phases: water evaporation; endothermic depolymerization and chain scission; and the bond formation and cross-linking polycondensation yielding macromolecular substances. Then, the optimum pyrolysis conditions were obtained and the MSW pyrolysis kinetics among 300°C and 800°C were analyzed, providing a theoretical basis for following studies. The results showed that the activation energy varies significantly as the conversion rate increases with an average activation energy of 122.53 kJ·mol−1. The tar productions have a relatively simple composition containing only about 36 species. The pyrolysis tar produced by MSW is composed of aromatic hydrocarbons containing 4 rings and the size of the cyclic compounds decreases with increase in temperature. Finally, the newly pyrolysis mechanism of MSW is proposed and summarized in the paper.
GRAPHICAL ABSTRACT
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Anqiang Zhang
Anqiang Zhang received his Ph.D. degree in Power engineering and engineering thermophysics from University of Science and Technology Beijing (China) in 2013. He is currently working in CECEP Industrial Energy Conservation Co., Ltd. His research interests mainly focuses on organic solid waste resource treatment.
Zhijun Yu
Zhijun Yu received the M.S. degree (2008) from Chinese Academy of Sciences (China) and he is currently working toward the Ph.D. degree in Energy and environmental protection with the School of Environment of Tsinghua University (China). He is working in CECEP Industrial Energy Conservation Co. , Ltd. now, and he mainly focuses on Energy saving and environmental protection, clean energy utilization, and comprehensive treatment of coal mine gas.
Haohua Ren
Haohua Ren received the M.S. degree (2012) and the Ph.D. degree (2015) in Mineral processing engineering from China University of Mining & Technology (China). He is currently working in Sinomach Tdi International Engineering Co., Ltd, and his research interests include Solid waste treatment.