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Title: CARBON DIOXIDE CAPTURE FROM FLUE GAS USING DRY REGENERABLE SORBENTS

Electrobalance studies of calcination and carbonation of sodium bicarbonate materials were conducted at Louisiana State University. Calcination in an inert atmosphere was rapid and complete at 120 C. Carbonation was temperature dependent, and both the initial rate and the extent of reaction were found to decrease as temperature was increased between 60 and 80 C. A fluidization test apparatus was constructed at RTI and two sodium bicarbonate materials were fluidized in dry nitrogen at 22 C. The bed was completely fluidized at between 9 and 11 in. of water pressure drop. Kinetic rate expression derivations and thermodynamic calculations were conducted at RTI. Based on literature data, a simple reaction rate expression, which is zero order in carbon dioxide and water, was found to provide the best fit against reciprocal temperature. Simulations based on process thermodynamics suggested that approximately 26 percent of the carbon dioxide in flue gas could be recovered using waste heat available at 240 C.
Authors:
; ; ; ; ;
Publication Date:
OSTI Identifier:
789031
Report Number(s):
FC26-00NT40923--01
TRN: AH200137%%162
DOE Contract Number:
FC26-00NT40923
Resource Type:
Technical Report
Resource Relation:
Other Information: PBD: 1 May 2001
Research Org:
National Energy Technology Lab., Pittsburgh, PA (US); National Energy Technology Lab., Morgantown, WV (US)
Sponsoring Org:
US Department of Energy (US)
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; 01 COAL, LIGNITE, AND PEAT; ACID CARBONATES; CARBON DIOXIDE; FLUE GAS; CHEMICAL REACTION KINETICS; WASTE HEAT UTILIZATION; SODIUM COMPOUNDS; CALCINATION; FLUIDIZED BEDS; REMOVAL; AIR POLLUTION CONTROL