Kinetics and structural evolution of sorbents at high temperatures. Final report, June 1, 1990--June 30, 1991
- Ohio State Univ., Columbus, OH (United States)
The focus of this project is on in-furnace (above the flame) sorbent injection technology using dry, calcium-based sorbents for high-sulfur coal flue gas desulfurization. The purpose of this project is to investigate the fundamentals of sorbent-gas interactions at high temperatures and short residence times. Sorbents generally used are CACO{sub 3} or Ca(OH){sub 2}. Additives can be mixed with the sorbent to enhance sulfur removal, and they can be physically mixed with the sorbent or added during the hydration process for producing the hydroxide. The particle size is small, typically less than 50 microns. This period screening of the reaction parameters is carried out for limestone and hydrated lime particles in the temperature range 800 to 1100{degrees}C, for various SO{sub 2} concentrations. The limestone was doped with compounds of Na, K, Cr and Fe prior to calcination. This doping procedure causes solution of the dopant in the solvent CaO during calcination. The doped sorbents exhibit a lower surface area compared to undoped CaO, caused by solution reaction and/or sintering effect. In spite of addition of the dopants, the decrease in surface area is significant enough for the sulfation rate to decrease.
- Research Organization:
- Ohio Coal Development Office, Columbus, OH (United States); The Ohio State Univ., Columbus, OH (United States)
- Sponsoring Organization:
- Ohio State Government, Columbus, OH (United States)
- OSTI ID:
- 10115528
- Report Number(s):
- OCDO-93004575; ON: TI93004575; CNN: Grant CDO/R-87-2C/B
- Resource Relation:
- Other Information: PBD: Feb 1992
- Country of Publication:
- United States
- Language:
- English
Similar Records
Sorbent production/modification/additives. Final report, June 1, 1990--August 31, 1991
Development of Superior Sorbents for Separation of CO2 from Flue Gas at a Wide Temperature Range During Coal Combustion
Related Subjects
20 FOSSIL-FUELED POWER PLANTS
54 ENVIRONMENTAL SCIENCES
FLUE GAS
DESULFURIZATION
SULFUR DIOXIDE
AIR POLLUTION CONTROL
CALCIUM OXIDES
SORPTIVE PROPERTIES
CHEMICAL REACTIONS
GASES
LIMESTONE
PROGRESS REPORT
SORBENT INJECTION PROCESSES
PARTICLE SIZE
SURFACE AREA
POROSITY
CALCINATION
ADDITIVES
SULFATION
CORRELATIONS
SODIUM
POTASSIUM
IRON
CHROMIUM
010800
200202
540120
WASTE MANAGEMENT
NOXIOUS GAS AND PARTICULATE EMISSIONS
CHEMICALS MONITORING AND TRANSPORT