EXPERIMENTAL INVESTIGATION OF CO-GASIFICATION OF COAL AND BIOMASS WITH CO2 CAPTURE USING CaO SORBENT

Gasification is a promising eco-friendly technology to meet the current and future energy demands. One of the main issues of gasification is the presence of major greenhouse gas CO2 in the product gas. The aim of this paper is to study the effect of parameters on sorbent-enabled gasification process to reduce CO2 emissions. Experimental investigation of the effect of parameters Equivalence Ratio(ER), Steam to Fuel Ratio (SFR), a Sorbent-to-Fuel Ratio (SOFR) and a Coal-to-Biomass Ratio (CBR) on syngas composition in the co-gasification of coal and biomass is performed in a lab-scale biomass gasifier. Results indicated that the addition of sorbent during gasification decreases the CO2 content and increases H2 yield. An increase of 21.5% in H2 and reduction of 24.3% in CO2 emissions is achieved at CBR of 0.25/0.75.