Effect of Equivalence Ratio on an Efficiency of Single Throat Downdraft Gasifier Using RDF from Municipal solid waste

Abstract

This study presents an effect of Equivalence Ratio (ER) on the efficiency of single throat downdraft gasifier using Refuse Derived Fuel (RDF) from municipal solid waste (MSW). ER on gas composition, syngas heating value, and cold gas efficiency, was determined in this study. The RDF with density of 930 kg/m3 and diameter and length of RDF were 8 and 25 mm, respectively was used as a fuel for gasifier. The ER was varied from 0.15-0.50 to study the production of the produced gas and to evaluate optimum point of heating value and cold gas efficiency. From the experiment, it was found that air feeding rate affects to the concentration of the syngas composition, consisted of CO, H2, and CH4. The syngas was produced at rate of 4.05 Nm3/kgRDF and the heating value of syngas was 5.87 MJ/Nm3. The result also revealed that cold gas efficiency was 73.04 % at optimum ER of 0.35.