Environmental Performance and Operational Analysis of a Sewage Sludge Fermentation Solid Oxidation Fuel Cell System Using Fe<sub>2</sub>O<sub>3</sub> and Kanuma Clay

This study discussed the performance of an integrated indirect gasification solid oxidation fuel cell (IIG-SOFC) in consideration LCA thinking. Generally, hydrogen sulfide (H2S) gasified biomass causes voltage a stack to decline over time. Although resource such as sewage sludge are carbon-neutral, SOFC creates environmental disadvantage global warming potential (GWP); such, it is necessary remove H2S via adsorption, and typically, ferric oxide (Fe2O3) used for desulfurization. However, Fe2O3 imposes considerable burden abiotic depletion (ADP). Kanuma clay (Kc) which natural sorbent was proposed viable substitute our previous study, but Kc characterized by low adsorption capacity. As limitations associated with column size frequency adsorbents should be changed mean that utilizing large amount does not necessarily result high desulfurization rate. Therefore, we investigated optimal IIG-SOFC using exergy analysis LCA. result, maximum efficiency 28.2%. Likewise, smallest GWP ADP achieved at rate 100%, usage ratio 4.5%, temperature 120 °C.