文献类型：期刊文献

英文题名：Kinetics of gas-liquid reaction between NO and Co(en)₃³⁺

作者：Long, XL; Xiao, WD; Yuan, WK

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

年份：2005

卷号：44

期号：12

起止页码：4200

外文期刊名：INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000229791000005)】；

语种：英文

摘要：NO can be removed from exhaust gas streams by using a basic solution of cobalt ethylenediamine (en = H2NCH2CH2NH2). The cobalt ethylenediamine acts as a homogeneous catalyst to oxidize NO into soluble nitric dioxide and realize the oxidation and absorption of nitric oxide simultaneously. The dissolved oxygen in equilibrium with the residual oxygen in the exhaust gas stream acts as the oxidant. A stirred vessel with a plane gas-liquid interface was used to measure the absorption rates of NO into Co(en)(3)(3+) solutions under anaerobic conditions and under aerobic conditions. The experiments demonstrate that the nitric oxide absorption reaction can be regarded as instantaneous when nitric oxide concentration levels are at ppm levels. The gas-liquid reaction becomes gas film controlling as the cobalt ethylenediamine concentration exceeds 0.02 M. Oxygen in the gas phase is favorable for the absorption of nitric oxide. The optimal temperature for nitric oxide absorption is 60 degrees C under anaerobic conditions and 50 degrees C with 5.2% oxygen present in the gas phase. The kinetics equation of NO absorption into Co(en)(3)(3+) solutions in the presence of oxygen can be written as N-NO = [2K(NO,G)(P-NO + gamma C-Co(en)(3)(3+),L)H-O2(k(2)D(O2,L))(1/2)po(2)]/[k(-1) + 2H(O2)(k(2)D(O2,L))(1/2)p(O2)].