The principal objectives of this research are twofold: (A) To understand the mechanism and assess tile effectiveness of sulfur capture by the chemical calcium magnesimn acetate (CMA); and (B) To evaluate the NOx reduction capabilities of CMA by pyrolyzing the organic constituents of the chemical (the acetate) and reducing NO to stable N2. 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 C02, SO=, NO_, H20, 02 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 effectiveness of "homemade" CMAs containing various amounts of calcium and magnesium will be investigated to explore the role of the two chemicals in the NO_ and mainly the S02 capture processes. Finally, CMA will be introduced in the matrix of coal particles by an ion exchange technique. Upon subsequent combustion, the S02-NO= emissions will be monitored and compared to those from burning untreated coat. The composition and physical structure of the ash residues will also be examined. Both techniques (CMA pretreatment and CMA injection) may also be implemented simultaneously to assess their combined effect on S02-NO= reduction. The work reported herein pertains to these latter tasks, i.e., treating coa,1 with CMA and measuring the reduction in S02 emissions and was conducted over the last, few months. During tl,e same time period more work was conducted by introducing dry and wet CMA in Sm,BUT,ON oFTH,S DOCUMem ,S UNL ITm V the post-flame region of tile furnace. Such work will be communicated upon completion in the next quarterly report.

No abstract

Project Objectives: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_ reduction capabilities of CMA by pyrolyzing the organic constituents of the chemical (the acetate) and reducing NO to stable N2. 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 C02, SO_, NO_, H20, 02 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 effectiveness of "homemade" CMAs containing various amounts of calcium and magnesium will be investigated to explore the role of the two chemicals in the NO_ and mainly the SO2 capture processes.Finally, CMA Will be introduced in the matrix of coal particles by an ion exchange technique. Upon subsequent combustion, the SO2-NO_ emissions will be monitored and compared to those from burning untreated coal. The composition and physical structure of the ash residues will also be examined. Both techniques (CMA pretreatment and CMA injection) may also be implemented simultaneously to assess their combined effect on S02-NO_ reduction. To achieve these objectives thefollowing project tasks were carried over this 4_h