Control of coal combustion SO[sub 2]and NO[sub x] emissions by in- boiler injection of CMA
The principal objectives of the proposed research are two-fold: (A) To understand the mechanism and assess the effectiveness of sulfur capture by the chemical calcium magnesium acetate (CMA); and (B) To evaluate the NO[sub x], reduction capabilities of CMA by burning the organic constituents of the chemical (the acetate) and reducing NO to stable N[sub 2]. The optimum conditions and the location of CMA introduction in the furnace will be identified. To achieve these goals water solutions of CMA or dry powders of CMA will be injected into hot air or gases simulating the furnace exhaust (containing CO[sub 2], SO[sub x],NO[sub x], H[sub 2]O, O[sub 2] etc.) and the composition of gaseous and solid products of the reaction will be monitored. The processes of burning the organic acetate as well as the calcination, sintering and sulfation of the remaining solid will be studied in detail. The possibility of introducing two different sorbents sequentially will also be examined. For instance, such a scheme may employ injection of the rather inexpensive calcium carbonate initially, followed by the more costly CMA. The effectiveness of a homemade'' CMA using woody biomass as a low-cost source of acetate will be explored if such a product becomes available during the course of this work. Finally, CMA will be introduced in the matrix of the coal by an ion exchange or a precipitation technique. Upon subsequent combustion, the composition and physical structure of the remaining ash will be examined, as well as the gas phase SO[sub x], concentration. Both techniques (CMA pretreatment and CMA injection) may also be implemented simultaneously to assess their combined effect on sulfur capture.
- Research Organization:
- Northeastern Univ., Boston, MA (United States)
- Sponsoring Organization:
- USDOE; USDOE, Washington, DC (United States)
- DOE Contract Number:
- FG22-92PC92535
- OSTI ID:
- 6591038
- Report Number(s):
- DOE/PC/92535-T2; ON: DE93013611
- Country of Publication:
- United States
- Language:
- English
Similar Records
Control of coal combustion SO{sub 2} and NO{sub x} emissions by in-boiler injection of CMA. [Third quarterly progress report], 1 July 1994--30 September 1994
Control of coal combustion SO{sub 2} and NO{sub x} emissions by in-boiler injection of CMA. Seventh quarterly project status report, April 1, 1994--June 30, 1994
Related Subjects
01 COAL, LIGNITE, AND PEAT
FOSSIL-FUEL POWER PLANTS
AIR POLLUTION CONTROL
SORBENT INJECTION PROCESSES
NITROGEN OXIDES
SULFUR DIOXIDE
ACETATES
BOILERS
CALCINATION
CALCIUM COMPOUNDS
MAGNESIUM COMPOUNDS
PROGRESS REPORT
SINTERING
SULFATION
ALKALINE EARTH METAL COMPOUNDS
CARBOXYLIC ACID SALTS
CHALCOGENIDES
CHEMICAL REACTIONS
CONTROL
DECOMPOSITION
DOCUMENT TYPES
FABRICATION
NITROGEN COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
POLLUTION CONTROL
POWER PLANTS
PYROLYSIS
SULFUR COMPOUNDS
SULFUR OXIDES
THERMAL POWER PLANTS
THERMOCHEMICAL PROCESSES
200202* - Fossil-Fueled Power Plants- Waste Management- Noxious Gas & Particulate Emissions
014000 - Coal
Lignite
& Peat- Combustion