Hydrogen Sulfide Capture by Limestone and Dolomite at Elevated Pressure. 1. Sorbent Performance

摘要: Sulfur emission control in fossil fuel gasification plants implies the removal of H{sub 2}S from product gas either inside furnace or clean-up system. In a fluidized-bed gasifier, in-bed sulfur capture can be accomplished by adding calcium-based sorbent such as limestone dolomite to bend and removing system with bottom ash form CaS. This work describes uptake set physically chemically different limestones dolomites under pressurized conditions, typically for those gasifier (2 MPa, 950 C). The tests were done thermobalance at two p{sub CO{sub 2}} levels. Thus, sulfidation both calcined uncalcined sorbents could analyzed. effect 2}S} was also investigated half-calcined dolomites. results are presented conversion CaCO{sub 3} CaO CaS vs time plots. compared performance same combustion conditions.