Kunihiko Namba*, Kyoji Kimoto*, Eiji Fujita** and Tsuyoshi Nakajima***

* Department of Mechanical Engineering, Osaka Prefectural College of Technology
** Senior Engineer, Research & Development Center, ShinMaywa Industries, Ltd.
*** Professor, Department of Mechanical Engineering, Kobe University

+ Correspondence should be addressed to Kunihiko Namba:
(26-12 Saiwai-cho Neyagawa-city Osaka 572-8572 Japan)

Abstract

This study is an attempt to burn Pulverized Refuse-Derived Fuel (P-RDF) prepared from municipal solid waste (MSW) for recycling of waste resources. New experimental apparatus and method were established in order to obtain fundamental data of P-RDF combustion in a furnace. A small amount of P-RDF in the fuel holder were heated up by high temperature flow gas under a variety of O2 concentrations. The pyrolytic and burnt gases were extracted by a water-cooled sampling probe, and then these compositions were analyzed by a FT-IR gas analyzer. The effects of temperature and O2 concentration on the composition in flue gas were investigated in order to elucidate pyrolytic or combustion mechanisms of P-RDF. Results showed that the pyrolytic and burnt gases include components such as nitrogen oxide, carbon monoxide, carbon dioxide, methane, ethylene, ethane and propylene, and the main component of the pyrolytic hydrocarbonic gas is methane. The concentrations of the pyrolytic and burnt gases mentioned above were raised with an increase in temperature and O2 concentration in flow gas. In particular, fuel NO was observed even in the low temperature of 400*C[Celsius degeree] in N2 gas flow.

Key words: Refuse-Derived Fuel (RDF), Municipal Solid Waste (MSW), pyrolysis, combustion products, chemical reaction