We investigated the effect of temperature and pressure in breakthrough performance of various sorbents for dechlorination and desulfurization. Based on the results obtained during the desulfurization (Fe2O3, Fe3O4, ZnO) and the dechlorination (Na2CO3, NaHCO3, trona) screening tests, ZnO and trona were selected as preferred optimum sorbents. H2S breakthrough time corresponds to an effective capacity of approximately 11 g H2S/100 g of sorbent. Also, HCl breakthrough time corresponds to an effective capacity of approximately 5 g HCl/100 g of sorbent. ZnO and trona at high temperature of around 550oC display high sorption performance and removal efficiency for synthsis gas from waste gasification. Although there is an issue of CO2 recovery in hot gas cleanup technology for desulfurization, we have obtained an interesting new alternative hot gas cleanup system with heat budget merit.

Simulated waste-derived synthesis gas has been tested for hydrogen production through water gas shift (WGS) reaction in the temperature range of 240oC ~ 400oC over supported Pt catalysts prepared by an incipient wetness impregnation method. MG30, MgO, ZrO2, Al2O3 and CeO2 were employed as supports for WGS reaction in this study. 1 wt.% Pt/ CeO2 catalyst exhibited the highest CO conversion as well as 100% CO2 selectivity. This is due to easier reducibility of Pt/CeO2 and high oxygen mobility and oxygen storage capacitiy of CeO2. Pt/CeO2 catalyst can be a promising catalyst for WGS reaction from waste-derived synthesis gas.