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Field evaluation of low-emission coal-burner technology on utility boilers. Volume 4. Alternative concepts for SOx, NOx, and particulate emissions control from a fuel-rich precombustor. Final report, September 1978-June 1986

Technical Report ·
OSTI ID:7042171
; ; ; ;
The report gives results of a study of the use of precombustors for the simultaneous control of SO{sub 2}, NOx, and ash emissions from coal combustion. In Phase 1, exploratory testing was conducted on a small pilot scale--293 kW (million Btu/hr)--pulverized-coal-fired precombustor to identify critical operating parameters. The results from this testing raised several questions regarding the viability of controlling SO{sub 2} emissions by injecting calcium-based sorbent materials, under conditions simultaneously conducive to NOx control, and to the rejection of coal ash as a molten slag. In Phase 2, key elements of the sulfur capture process, under the fuel-rich precombustor conditions necessary to control NOx formation, were investigated. Detailed experimental studies were conducted at bench and laboratory scales to investigate the formation of stable sulfides in the entrained flow region of a precombustor, using calcium-based sorbents; study the evolution of sulfur from coal under entrained flow combustion conditions; and investigate the stability of sulfur species in molten slag layers. Study results indicated that the sulfidation reactions between CaO and H{sub 2}S or COS are fast and, under optimum conditions, can remove a high fraction of the gas-phase sulfur species in a fuel-rich precombustor.
Research Organization:
Energy and Environmental Research Corp., Irvine, CA (USA)
OSTI ID:
7042171
Report Number(s):
PB-90-155714/XAB
Country of Publication:
United States
Language:
English

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Related Subjects

01 COAL, LIGNITE, AND PEAT
010800 -- Coal
Lignite
& Peat-- Waste Management
014000* -- Coal
Lignite
& Peat-- Combustion
20 FOSSIL-FUELED POWER PLANTS
200202 -- Fossil-Fueled Power Plants-- Waste Management-- Noxious Gas & Particulate Emissions
AIR POLLUTION CONTROL
BOILERS
BURNERS
CARBONACEOUS MATERIALS
CHALCOGENIDES
CHEMICAL REACTIONS
COAL
COMBUSTION CHAMBERS
COMBUSTION PRODUCTS
CONTROL
DESULFURIZATION
DOCUMENT TYPES
EFFICIENCY
ENERGY SOURCES
FLUE GAS
FOSSIL FUELS
FOSSIL-FUEL POWER PLANTS
FUELS
GASEOUS WASTES
MATERIALS
NITROGEN COMPOUNDS
NITROGEN OXIDES
OXIDES
OXYGEN COMPOUNDS
PARTICLES
PARTICULATES
PERFORMANCE TESTING
POLLUTION CONTROL
POWER PLANTS
PROGRESS REPORT
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR OXIDES
TESTING
THERMAL POWER PLANTS
WASTES