Hydrogen sulfide capture by limestone and dolomite at elevated pressure. 1: Sorbent performance
- Aabo Akademi Univ. (Finland). Dept. of Chemical Engineering
Sulfur emission control in fossil fuel gasification plants implies the removal of H{sub 2}S from the product gas either inside the furnace or in the gas clean-up system. In a fluidized-bed gasifier, in-bed sulfur capture can be accomplished by adding a calcium-based sorbent such as limestone or dolomite to the bend and removing the sulfur from the system with the bottom ash in the form of CaS. This work describes the H{sub 2}S uptake by a set of physically and chemically different limestones and dolomites under pressurized conditions, typically for those in a pressurized fluidized-bed gasifier (2 MPa, 950 C). The tests were done with a pressurized thermobalance at two p{sub CO{sub 2}} levels. Thus, the sulfidation of both calcined and uncalcined sorbents could be analyzed. The effect of p{sub H{sub 2}S} was also investigated for uncalcined limestones and half-calcined dolomites. The results are presented as conversion of CaCO{sub 3} or CaO to CaS vs time plots. The results are also compared with the sulfur capture performance of the same sorbents under pressurized combustion conditions.
- OSTI ID:
- 183029
- Journal Information:
- Industrial and Engineering Chemistry Research, Journal Name: Industrial and Engineering Chemistry Research Journal Issue: 1 Vol. 35; ISSN IECRED; ISSN 0888-5885
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
CALCINATION
CALCIUM CARBONATES
CALCIUM OXIDES
CALCIUM SULFIDES
COAL GASIFICATION
COMBINED-CYCLE POWER PLANTS
DESULFURIZATION
DOLOMITE
FLUIDIZED BEDS
FUEL GAS
GAS GENERATORS
HOT GAS CLEANUP
HYDROGEN SULFIDES
LIMESTONE
PARTIAL PRESSURE
PERFORMANCE
PRESSURIZATION
SORBENT INJECTION PROCESSES
SULFIDATION