Chemical kinetic studies on dry sorbents. Final report. [Sodium bicarbonate]
Abstract
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 stepsmore »
- Authors:
- Publication Date:
- Research Org.:
- Tennessee Univ., Knoxville (USA)
- OSTI Identifier:
- 5178300
- Report Number(s):
- DOE/FC/10184-1
ON: DE82012765
- DOE Contract Number:
- AC18-80FC10184
- Resource Type:
- Technical Report
- Resource Relation:
- Other Information: Portions of document are illegible
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 01 COAL, LIGNITE, AND PEAT; 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)
Citation Formats
Davis, W T, and Keener, T C. Chemical kinetic studies on dry sorbents. Final report. [Sodium bicarbonate]. United States: N. p., 1982.
Web.
Davis, W T, & Keener, T C. Chemical kinetic studies on dry sorbents. Final report. [Sodium bicarbonate]. United States.
Davis, W T, and Keener, T C. 1982.
"Chemical kinetic studies on dry sorbents. Final report. [Sodium bicarbonate]". United States.
@article{osti_5178300,
title = {Chemical kinetic studies on dry sorbents. Final report. [Sodium bicarbonate]},
author = {Davis, W T and Keener, T C},
abstractNote = {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.},
doi = {},
url = {https://www.osti.gov/biblio/5178300},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Mon Feb 15 00:00:00 EST 1982},
month = {Mon Feb 15 00:00:00 EST 1982}
}