Fixed-bed testing of durable, steam tolerant zinc containing sorbents
- Dept. of Energy, Morgantown, WV (United States). Morgantown Energy Technology Center
Development of a suitable regenerable sorbent is a major barrier issue in the Hot Gas Cleanup Program for Integrated Gasification Combined Cycle (IGCC) systems. This paper discusses promising sorbents developed at the Morgantown Energy Technology Center (METC) that have demonstrated sustained reactivity and physical integrity during repeated sulfidation and regeneration cycles. These sorbents were tested in both low-pressure (260 kPa/23 psig) and high-pressure (1,035 kPa/150 psig) fixed-bed reactors at 538 C with simulated, air-blown, Kellogg Rust Westinghouse (KRW) coal gas. In high-pressure testing, METC formulations were subjected to 20 sulfidation/regeneration cycles using steam as the regeneration diluent. After 20 cycles, there was no appreciable change in reactivity. In addition, no spalling or other physical deterioration was observed. In a parallel test, one formulation was exposed to real coal gas from a fluidized-bed gasifier and remained unaffected with respect to retention of reactivity and physical integrity. Sorbent pellets, which were prepared by a commercial vendor to METC specifications, were exposed to 50 sulfidation/regeneration cycles using conditions typical of the Tampa Electric Company (TECO) Clean Coal Technology (CCT) demonstration project. After the 50th sulfidation cycle, both the sulfur loading value and the attrition satisfied the requirements necessary for the TECO/CCT project. These sorbent pellets were also tested for 200 hours with real coal gas in the moving-bed reactor at General Electric Company. Sulfur absorption was proportional to the sorbent movement rate, and the attrition rate was quite low during the pilot-plant operation.
- OSTI ID:
- 504698
- Report Number(s):
- CONF-960954--
- Country of Publication:
- United States
- Language:
- English
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