【Paper】
Modeling of Municipal Solid Waste（MSW）Pyrolysis Reaction by Thermal Analysis
Shuji Himeno*, Yosuke Iyatomi*, Toshiya Komatsu* and Shoichi Fujita*
* Department of Civil and Environmental Engineering, Nagaoka University of Technology
† Correspondence should be addressed to Shuji Himeno:
（1630-1 Kamitomioka-machi, Nagaoka-city, Niigata, 940-2115 Japan）

Abstract
In waste processing, the gasification and melting system is effective in reducing the volume of ash and dioxin emission. For a more effective use of this system via the improvement of energy recovery and efficient usage of char as fuel, it is necessary to understand the pyrolysis behavior in the changes of Municipal Solid Waste（MSW）composition. In this study, we developed the pyrolysis reaction model of MSW which consists of typical chemical substances.
First, from MSW composition investigation, cellulose, xylan, lignin, polyethylene, polypropylene, polystyrene, and silicon dioxide were determined as representational substances of MSW. Secondly, their pyrolysis behavior, which were expressed with thermogravimetric（TG）curves were analyzed by a multireaction model, and the TG curves of the mixed samples of the representational substances were in good agreement with the weighted sum of the model TG curve of each representational substance. Finally, TG curves of MSW and refuse-derived fuels（RDF）were approximated with the weighted sum of the TG curve of the representational substances, and the composition calculated by the proposed model and the real composition were in good agreement with of all MSW and RDF.

Key words: municipal solid waste（MSW）, pyrolysis reaction model, gasification and melting system, thermal analysis