``Hot coal gas'' desulfurization by perovskite-type sorbents
The authors have evaluated the performance of perovskite-based sorbents for hot coal gas desulfurization. These sorbents (LaMnO{sub 3}, LaCoO{sub 3}, LaFeO{sub 3}, and La{sub 2}CuO{sub 4}) were tested in a fixed-bed reactor and characterized by X-ray diffraction studies and BET surface area measurements. The results indicate a high initial sulfur removal capacity for the perovskites (0.15--0.34 g of H{sub 2}S/g of sorbent) but poor regenerability. The analysis of spent and regenerated sorbents has revealed complete segregation of the A-site and B-site elements following sulfidation in the case of LaMnO{sub 3} and LaCoO{sub 3}. No such segregation was observed in the case of LaFeO{sub 3}, while an intermediate behavior was exhibited by La{sub 2}CuO{sub 4}. The BET measurements indicate a substantial loss of surface area following the first cycle of sulfidation and regeneration, which is in part responsible for the poor performance of the sorbents in successive cycles.
- Research Organization:
- Univ. of South Carolina, Columbia, SC (US)
- OSTI ID:
- 20000996
- Journal Information:
- Industrial and Engineering Chemistry Research, Vol. 38, Issue 10; Other Information: PBD: Oct 1999; ISSN 0888-5885
- Country of Publication:
- United States
- Language:
- English
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