文献类型：期刊文献

英文题名：Simultaneous absorption of NO and SO₂ into hexamminecobalt(II)/iodide solution

作者：Long, XL; Xiao, WD; Yuan, WK

机构：[1]E China Univ Sci & Technol, UNILAB, State Key Lab Chem React Engn, Shanghai 200237, Peoples R China

年份：2005

卷号：59

期号：6

起止页码：811

外文期刊名：CHEMOSPHERE

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000229134700007)】；

语种：英文

外文关键词：absorption; nitric oxide; sulfur dioxide; iodide; oxidation; ammonia solution

摘要：An innovative catalyst system has been developed to simultaneously remove NO and SO2 from combustion flue gas. Such catalyst system may be introduced to the scrubbing solution using ammonia solution to accomplish sequential absorption and catalytic oxidation of both NO and SO2 in the same reactor. When the catalyst system is utilized for removing NO and SO2 from the flue gas, Co(NH3)(6)(2+) ions act as the catalyst and I- as the co-catalyst. Dissolved oxyg en, in equilibrium with the residual oxygen in the flue gas, is the oxidant. The overall removal process is further enhanced by UV irradiation at 365 nm. More than 95% of NO is removed at a feed concentration of 250-900 ppm, and nearly 100% Of SO2 is removed at a feed concentration of 800-2500 ppm. The sulfur dioxide co-existing in the flue gas is beneficial to NO absorption into hexamminecobalt(II)/iodide solution. NO and SO2 can be converted to ammonium sulfate and ammonium nitrate that can be used as fertilizer materials. The process described here demonstrates the feasibility of removing SO2 and NO simultaneously only by retrofitting the existing wet ammonia flue-gas-desulfurization (FGD) scrubbers. (c) 2004 Elsevier Ltd. All rights reserved.