Regeneration and reuse of lime-based sorbent for sulfur oxides
Conference
·
OSTI ID:370379
- Iowa State Univ., Ames, IA (United States)
The feasibility of regenerating and reusing lime employed as a sorbent for SO{sub x} in a circulating fluidized bed combustor fired with petroleum coke was investigated by means of thermogravimetric analysis (TGA). A sample of limestone supplied to an industrial boiler was utilized as well as samples of bed ash and fly ash from the boiler. Each sample was subjected to a number of sulfation and regeneration cycles. During the sulfation step the sample was treated at 900{degrees}C with an SO{sub 2}-bearing gas and during the regeneration step it was treated with a reducing gas. The results indicated that it would be feasible to regenerate and recycle the sulfated bed ash produced by burning petroleum coke in a fluidized bed of limestone particles. Although the extent of sulfation of the particles declined as the number of sulfation and regeneration cycles increased, it was still possible to convert 30% or more of the CaO to CaSO{sub 4} after five cycles.
- OSTI ID:
- 370379
- Report Number(s):
- CONF-960376--
- Country of Publication:
- United States
- Language:
- English
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