Continuing development of regenerable sorbents for fluidized-bed combustion. Final report
The fluidized bed combustion of sulfur-bearing coals under presently-constituted environmental constraints requires an efficient sulfur capture system to be cost effective. The system configuration which has received the most attention is one in which combustion is effected in the presence of the sulfur-capture agent, which is itself a fluidized solid, generally limestone or dolomite. This system, however, may be found to be only marginally preferable to more conventional coal combustion methods when natural sorbents, limestones or dolomites, are employed in a once-through process which generates large quantities of partially-sulfated stone as waste by-product. In a previous experimental program (1), Exxon Research and Engineering Company sought to identify superior sulfur sorbents for direct use in fluidized-bed coal combustors. Two classes of promising materials emerged: calcium and barium titanates, and calcium aluminate cement. The titanates exhibited remarkable regenerability, retaining their activity for sulfur capture after repeated cycling from sulfation to regeneration. Formulations based on calcium aluminate cement were found to be especially resistant to attrition in a fluidized bed, while exhibiting good sulfur-capture activity. In this study, the assessment of representative synthetic sorbent materials was extended from the single-pellet laboratory analysis used in the original program to the testing of 100-gram aliquots in a hot, fluidized bed. Procedures for producing kilogram quantities of synthetic sorbent pellets for use in the test program had to be developed. And, a first attempt was made to characterize the ultimate effects of controllable variables in the pellet production process on sulfur activity and resistance to attrition.
- Research Organization:
- Exxon Research and Engineering Co., Linden, NJ (USA)
- DOE Contract Number:
- AC21-79ET15166
- OSTI ID:
- 6874623
- Report Number(s):
- DOE/ET/15166-1238; ON: DE83002937
- Resource Relation:
- Other Information: Portions of document are illegible. Printed copy available until stock is exhausted
- Country of Publication:
- United States
- Language:
- English
Similar Records
Regenerable sorbents for fluidized bed combustion. Quarterly progress report, no. 6, 1 April 1977--30 June 1977
Regenerable sorbents for fluidized bed combustion. Quarterly progress report, no. 5, 1 January 1977--31 March 1977
Related Subjects
01 COAL, LIGNITE, AND PEAT
37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
ADSORBENTS
CHEMICAL PREPARATION
PELLETIZING
PERFORMANCE
FLUIDIZED-BED COMBUSTORS
ADSORPTION
BARIUM COMPOUNDS
CALCIUM COMPOUNDS
COAL
DESULFURIZATION
EXPERIMENTAL DATA
FLUE GAS
FLUIDIZED-BED COMBUSTION
SULFUR OXIDES
TITANIUM OXIDES
ALKALINE EARTH METAL COMPOUNDS
CARBONACEOUS MATERIALS
CHALCOGENIDES
CHEMICAL REACTIONS
COMBUSTION
COMBUSTORS
DATA
ENERGY SOURCES
FABRICATION
FOSSIL FUELS
FUELS
GASEOUS WASTES
INFORMATION
MATERIALS
MOLDING
NUMERICAL DATA
OXIDATION
OXIDES
OXYGEN COMPOUNDS
SORPTION
SULFUR COMPOUNDS
SYNTHESIS
THERMOCHEMICAL PROCESSES
TITANIUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
WASTES
421000* - Engineering- Combustion Systems
014000 - Coal
Lignite
& Peat- Combustion
400200 - Inorganic
Organic
& Physical Chemistry