Abstract
The thermal performance of the gasification process depends on many factors, in which gasification agent is one of the major factors affecting the quality and heat value of syngas. This research uses the empirical method to determine the effect of the gasification agent on the quality and heat value of the syngas when changing the composition of oxygen and steam. Experimental model of gasification using rice husk and coal materials with type of Top Lift UpDraft gasifier (TLUD). The results show that when using the air as an agent, at the equivalent ratio (ER) of about 0.25, the gas product produces the highest calorific value (3835 kJ/Nm3). As the oxygen concentration increases by 70% in the agent, the heat value increases considerably (8646 kJ/Nm3), but requires a pure oxygen supply. The addition of steam increased the calorific value of the gas product, but was negligible (an increase of 0.28% as the S/A ratio went from 0 to 7). The experiment also showed that with the ratio of S/A = 0.5, the quality of gas products is the best.
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