Volume 6 Issue 3 ( September 2019 )

An instance growing of greenhouse gas emissions particularly CO₂ has been a global environmental issue that demands distinctive and practical actions to overcome. Tracking from the grass root of the great source of CO₂ emission, burning of fossil fuel can be indicted as the most influential contributor of anthropogenic activity. Thus, in addition to the reason of energy scarcity, it is necessary to massively shift the fossil fuel to renewable energy that introduces cleaner and environmentally benign energy resources. In this study, integration of biomass gasification (BG) and solid oxide fuel cell (SOFC) is applied to measure how much CO₂ emission can be reduced. However, the approach is not merely relying on renewability. It is correspondingly considered to abandon burning/combustion either partially or completely by utilization of the waste heat recovered from exhaust gas as well as excess heat from exothermic reaction to generate steam or external heat supply. In-situ utilization of CO₂ is also investigated in the systems. CO₂ emission is calculated by thermodynamic properties of each chemical compound that
involves the material balance, energy balance, and chemical equilibrium. Three scenarios of BG-SOFC integration system are presented in this study. Among those 3 scenarios, lowest CO₂ emission with high electric power output and char-free of gasification products is obtained in the scenario 3.

Keywords: CO₂ emission, solid oxide fuel cell, biomass gasification, heat recovery.