Advanced sulfur control concepts in hot-gas desulfurization technology. Quarterly report, January 1--March 31, 1998
The last six cycles of a 25-cycle sorbent durability test were completed, final installation of the flame photometric detector was accomplished, and fifteen tests whose aim was to determine the minimum prebreakthrough H{sub 2}S concentration over reduced CeO{sub 2} were performed. There was little, if any, evidence of sorbent deterioration in the durability test. During the durability test the author confirmed that, when using pre-reduced sorbent and a clean system, the prebreakthrough H{sub 2}S concentration was less than 100 ppmv, the detection limit of the thermal conductivity detector (TCD). Consequently, a more sensitive flame photometric detector (FPD) which permitted measurements of H{sub 2}S concentrations of 1 ppmv or less was installed. The FPD and TCD were connected in parallel so that, when desired, the entire H{sub 2}S breakthrough curve could be measured. Most of the quarter was devoted to conducting reduction-sulfidation tests to determine the minimum prebreakthrough H{sub 2}S concentrations which could be achieved using prereduced CeO{sub 2}. Fifteen runs involving variations in reduction-sulfidation temperature, H{sub 2}S concentration in the feed gas, and feed gas volumetric flow rate were completed. In all tests the prebreakthrough H{sub 2}S concentration was less than 10 ppmv, and in many of the tests the H{sub 2}S concentration was equal to or less than 1 ppmv for an extended time period.
- Research Organization:
- Louisiana State Univ., Dept. of Chemical Engineering, Baton Rouge, LA (United States)
- Sponsoring Organization:
- USDOE Assistant Secretary for Fossil Energy, Washington, DC (United States)
- DOE Contract Number:
- AC21-94MC30012
- OSTI ID:
- 656645
- Report Number(s):
- DOE/MC/30012-15; ON: DE98057992; TRN: AHC29817%%201
- Resource Relation:
- Other Information: PBD: [1998]
- Country of Publication:
- United States
- Language:
- English
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