Pyrolysis Characteristics and Kinetics of Municipal Solid Waste  

作　　者：李海英 张书延 赵新华 EIJI Suzuki 

机构地区：[1]School of Environment Science and Technology, Tianjin University [2]Department of Fine Material Engineering, Shinshu University

出　　处：《Transactions of Tianjin University》2005年第5期353-359,共7页天津大学学报（英文版）

基　　金：Supported by National Natural Science Foundation of China( No. 50378061).

摘　　要：Based on a systemic survey, the pyrolysis characteristics and apparent kinetics of the municipal solid waste （ MSW） under different conditions were researched using a special pyrolysis reactor, which could overcome the disadvantage of thermo-gravimetric analyzer. The thermal decomposition behaviour of MSW was investigated using thermo-gravimetric （ TG ） analysis at rates of 4.8,6.6,8.4, 12.0 and 13. 2 K/min. The pyrolysis characteristics of MSW were also studied in different function districts. The pyrolysis of MSW is a complex reaction process and three main stages are found according to the results. The first stage represents the degradation of cellulose and hemicellulose, with the maximum degradation rate occuring at 150℃ -200 ℃： the second stage represents dehydrochlorination and depolymerization of intermediate products and the differential thermogravimetric （ DTG ） curves have shoulder peaks at about 300℃： the third stage is the decomposition of the residual big molecular organic substance and lignin at 400 ℃- 600 ℃. Within the range of given experimental conditions, the results of non-linear fitting algorithm and experiment are in agreement with each other and the correlation coefficients are over0. 99. The kinetic characteristics are concerned with the material component and heating rate. The activation energy of reaction decreases with the increase of heating rate.Based on a systemic survey, the pyrolysis characteristics and apparent kinetics of the mu- nicipal solid waste (MSW) under different conditions were researched using a special pyrolysis re- actor, which could overcome the disadvantage of thermo-gravimetric analyzer. The thermal decom- position behaviour of MSW was investigated using thermo-gravimetric ( TG ) analysis at rates of 4.8, 6.6, 8.4, 12.0 and 13.2 K/min. The pyrolysis characteristics of MSW were also studied in dif- ferent function districts. The pyrolysis of MSW is a complex reaction process and three main stages are found according to the results. The first stage represents the degradation of cellulose and hemi- cellulose, with the maximum degradation rate occuring at 150 °C—200 °C; the second stage repre- sents dehydrochlorination and depolymerization of intermediate products and the differential thermo- gravimetric ( DTG) curves have shoulder peaks at about 300 °C; the third stage is the decomposi- tion of the residual big molecular organic substance and lignin at 400 °C—600 °C. Within the range of given experimental conditions, the results of non-linear fitting algorithm and experiment are in agreement with each other and the correlation coefficients are over 0.99. The kinetic characteristics are concerned with the material component and heating rate. The activation energy of reaction de- creases with the increase of heating rate.

关 键 词：mun cipal solid waste pyrolysis characteristics  kinetic  non-linear fitting algorithm 

分 类 号：X705[环境科学与工程—环境工程]