PERFORMANCE EVALUATION OF COMBINED PROCESS OF CHARCOAL GASIFICATION AND REFORMER OPERATED WITH RECYCLED CO2

Abstract

Using syngas as fossil fuel offers the benefit in term of suppress consumption of petroleum fuel. Gasification and reforming process can be used for syngas production. This work investigated the combined of gasifier and reformer process of charcoal with recycled CO2. The investigation was carried on both simulation and experimental. The simulation results show that carbon conversion depended on operating temperature. The effect of O2 in feed stream offered more heat obtained from process which optimum at O2/B = 0.2. At higher S/B in feed stream led to more H2 in syngas product. And the effect of CO2/B feed ratio affect on both of CO2 emr and syngas ratio. For feed ratio O2/S/CO2/B = 0.2/1/1/1 offered the highest Cold Gas Efficiency (CGE) of 0.742. From experimental study, the operating temperature of 800 ºC was observed for the highest carbon conversion. For the effect of Ni/SiO2 catalysts, increasing Ni% loading offered more product gas due to the reforming reaction of gas product. Varying of O2/S/CO2/B feed ratio showed in similar trend of product gas mole fraction to the simulation result. For condition of CO2/B ratio = 0, provided the highest for syngas yield. However, using CO2 was beneficial in reducing GHG emissions and adjusting syngas ratio.