J. Steciak, W. Zhu, Y. Levendis
Dec 1, 1994
Citations
0
Influential Citations
14
Citations
Journal
Combustion Science and Technology
Abstract
Abstract A laboratory study was conducted to assess the effectiveness of the chemicals calcium magnesium acetate (CMA), calcium acetate (CA), and calcium benzoate (CB) in reducing NOx emission from coal-fired furnaces. CMA, which is currently being used as a non-corrosive road deicing salt, has demonstrated exceptional effectiveness in our laboratory as an in-boiler S02 removal agent (Levendis et al., 1993). This is due to the affinity of the calcium and magnesium components of CM A for sulfur; the reaction results in solid sulfate salts. The current investigation explored the role of the organic component of CMA, as well as that in CA and CB, in removing NOx emissions that are typically found in post-flame regions of furnaces burning pulverized coal or residual oil. Bench-scale experiments were conducted at gas temperatures ranging from 450 to 1450°C and oxygen concentrations between 0 to 5%. The residence time was in the order of 4 s, Injection of the CMA reagent at a mass ratio of CMA/NO of 41 (or an e...