Abstract
H2S and HCl released during biomass gasification can decrease the performance of high-temperature fuel cells in an Integrated Gasification Fuel Cell power-generating system. In addition, biomass gasification has the potential to release environmental hazardous compounds such as heavy metals and aromatic hydrocarbons. The behaviors of such hazardous compounds must be understood to design a gas cleaning process for MCFC and find out the optimal gasification condition with respect to environmental load. Unfortunately, the emission characteristics of those compounds are expected to depend on the element composition of the biomass of interest. In this study, therefore, some residual biomass fuels were focused, and so the behaviors of the hazardous compounds in the gasification of these biomass fuels were predicted using an equilibrium calculation approach (Gibbs energy minimization). The present predictions showed the difference in emission behavior among the biomass fuels. Furthermore, we discussed the influence of elemental feedstock composition and gasification temperature on the emission behavior. Finally, the ability of this calculation approach to predict the emission behavior was evaluated by comparing with the literature data.
