The Effect of H₂O (Steam) Agent Temperature Variation on the Co-Gasification of Coal and RDF MSW on the Temperature Profile in a Dual Reactor Fluidized Bed.

Abstract

The limitations of fossil energy and the increasing energy demand drive the development of sustainable alternative energy sources, such as Refuse Derived Fuel (RDF), a solid fuel produced from processed municipal waste that has a relatively high calorific value and helps reduce waste accumulation. The dual fluidized bed co-gasification technology converts a mixture of solid fuels into syngas through a thermochemical process under limited oxygen conditions. Silica sand as the bed material supports heat transfer within the dual reactor system. H2O gas agent (steam) is used to enhance reactions and improve the efficiency of co-gasification, which affects the performance of the dual fluidized bed co-gasification system. This study employed H2O gas agent (steam) at temperatures of 130-190°C to evaluate the performance of the dual fluidized bed co-gasification, using a 0.6 kg fuel mixture consisting of 90% coal and 10% RDF MSW.Based on the results of the study, an increase in the temperature of the H₂O gasifying agent in the dual fluidized bed co-gasification process leads to a gradual rise in the dual reactor temperature until it reaches a steady state. This condition supports the continuation of endothermic reactions.