Claims
- 1. A process for reducing the sulfur oxide concentration of an effluent gas stream comprising admixing with said effluent gas stream a sulfur sorbent composition comprising a hydrated alkaline earth metal oxide and a promoting additive mixture of urea and water soluble iron salts; said sorbent composition having the following properties:
- alkaline earth metal (wt. %)--about 40-52;
- molar ratio of promoting additive mixture to alkaline earth metal--about 0.001-0.2;
- wherein said admixing is carried out at a temperature of between about 900.degree. C. to about 1200.degree. C. for a period of less than about 2.0 seconds and provides at least a 65% reduction in the sulfur content of the treated gas stream.
- 2. A process according to claim 1, wherein said admixing is carried out at a temperature of between about 1050.degree. C. to 1200.degree. C. for a period of less than about 2.0 seconds.
- 3. A process according to claim 1, including admixing said sorbent in amounts sufficient to provide a ratio of alkaline earth metal to sulfur in the effluent gas stream of about three or less.
- 4. A process according to claim 1, wherein said admixing step further includes admixing a sulfur sorbent composition having the following properties:
- alkaline earth metal (wt. %)--about 40-52;
- molar ratio of promoting additive to alkaline earth metal in said alkaline earth metal oxide--about 0.001-0.2;
- bulk density (g/ml)--about 0.25-0.95;
- surface area (m.sup.2 /g)--about 3-75;
- pore volume (cc/g)--about 0.02-0.20; and
- mean particle size (.mu.m)--< about 6.0.
- 5. A process according to claim 1, wherein said admixing step further includes admixing a sulfur sorbent composition having the following properties:
- alkaline earth metal (wt. %)--about 40-52;
- molar ratio of promoting additive to alkaline earth metal in said alkaline earth metal oxide--about 0.001-0.2;
- bulk density (g/ml)--about 0.35-0.75;
- surface area (m.sup.2 /g)--about 5-25;
- pore volume (cc/g)--about 0.05-0.14; and
- mean particle size (.mu.m)--.ltoreq. about 4.0.
Parent Case Info
This is a division of application Ser. No. 07/898,121, filed Jun. 12, 1992 now U.S. Pat. No. 5,282,999.
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Lowicki et al. |
Sep 1973 |
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4191115 |
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Divisions (1)
|
Number |
Date |
Country |
Parent |
898121 |
Jun 1992 |
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