Chemical kinetic studies on dry sorbents. Final report. [Sodium bicarbonate]
The scope of this research investigation has included a review of potential additives suitable for dry flue-gas desulfurization (FGD) and a bench scale laboratory study to determine the chemical kinetics for the reaction of five different sorbents with sulfur dioxide. The sorbents chosen included sodium bicarbonate (NaHCO/sub 3/), soda ash (Na/sub 2/CO/sub 3/), trona, lime (CaO) and hydrated lime (Ca(OH)/sub 2/). This study has shown that: (1) The reaction rate increases with temperature for soda ash and calcium oxide. The reaction temperature has an inverse effect on sodium bicarbonate and trona due, primarily, to the simultaneous thermal activation reaction. The calcium hydroxide-SO/sub 2/ reaction increased up to 550/sup 0/F, and then decreased, due to uneven gas flow distribution. (2) The reaction rates for soda ash, calcium oxide and calcium hydroxide were increased by decreasing their particle size. This effect was not confirmed for sodium bicarbonate and trona where reaction temperature was the most important reaction parameter. (3) Reaction with soda ash was found to be limited by the presence of an impervious ash layer which prevented interparticle gaseous diffusion. Calcium oxide and calcium hydroxide were found to be limited by a slow chemical reaction rate. Results on the rate-limiting steps for sodium bicarbonate and trona were inconclusive because of the simultaneous thermal activation reaction. (4) The effect of thermal activation was to increase the reaction rate for sodium bicarbonate and trona at lower temperatures. This effect was less pronounced at higher temperatures. (5) Results obtained for nitric oxide show limited adsorption for the five sorbents tested as compared to the finding for sulfur dioxide.
- Research Organization:
- Tennessee Univ., Knoxville (USA)
- DOE Contract Number:
- AC18-80FC10184
- OSTI ID:
- 5178300
- Report Number(s):
- DOE/FC/10184-1; ON: DE82012765
- Resource Relation:
- Other Information: Portions of document are illegible
- Country of Publication:
- United States
- Language:
- English
Similar Records
Carbon Dioxide Capture from Flue Gas Using Dry Regenerable Sorbents
CARBON DIOXIDE CAPTURE FROM FLUE GAS USING DRY REGENERABLE SORBENTS
Related Subjects
20 FOSSIL-FUELED POWER PLANTS
42 ENGINEERING
ACID CARBONATES
ACTIVATION ENERGY
CHEMICAL REACTION KINETICS
CALCIUM HYDROXIDES
CALCIUM OXIDES
FLUE GAS
DESULFURIZATION
NITRIC OXIDE
CHEMISORPTION
SODIUM CARBONATES
SULFUR DIOXIDE
TRONA
ADSORBENTS
AIR POLLUTION CONTROL
BENCH-SCALE EXPERIMENTS
CHEMICAL REACTORS
COMPARATIVE EVALUATIONS
EXPERIMENTAL DATA
FABRIC FILTERS
HIGH TEMPERATURE
PARTICLE SIZE
SODIUM COMPOUNDS
TEMPERATURE DEPENDENCE
ALKALI METAL COMPOUNDS
ALKALINE EARTH METAL COMPOUNDS
CALCIUM COMPOUNDS
CARBON COMPOUNDS
CARBONATE MINERALS
CARBONATES
CHALCOGENIDES
CHEMICAL REACTIONS
CONTROL
DATA
ENERGY
FILTERS
GASEOUS WASTES
HYDROGEN COMPOUNDS
HYDROXIDES
INFORMATION
KINETICS
MINERALS
NITROGEN COMPOUNDS
NITROGEN OXIDES
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
POLLUTION CONTROL
REACTION KINETICS
SEPARATION PROCESSES
SIZE
SORPTION
SULFUR COMPOUNDS
SULFUR OXIDES
WASTES
010800* - Coal
Lignite
& Peat- Waste Management
200202 - Fossil-Fueled Power Plants- Waste Management- Noxious Gas & Particulate Emissions
424000 - Engineering- Pollution Control Equipment- (1980-1989)