湿法烟道气脱硫脱硝反应动力学

近年来,发展的同时脱硫脱硝方法,是借助于氧化不容易溶解的NO到容易溶解的NO_2,或者利用水溶性亚铁螯合物作为一种催化剂加速NO的吸收,也就是亚铁螯合物能够与NO形成一个络合物而促进NO的吸收。或者应用水溶液中NO_x被溶解的SO_2还原形成N_2,N_2O或还原到氮化物如NOH(SO_3~(2-)_2、 NH_2SO_3~-和NH_4~+而除去,而SO_2被氧化生成硫酸盐。本文综述了湿法烟道气脱硫脱硝反应动力学和机理以及一些中间化合物形成与消失的过程。

Kinetics of Reaction in the Process of Simultaneous Desulfurization and Denitrifieation of Wet Flue Gas

A number of processes currently undergoing develo-pment for simultaneous removal of SO2 and NOx are based on either the oxidation of relatively insoluble NO to more soluble NO2 or the employment of a water-soluble ferrous-chelating compound, which can react with NO to form complexes, as catalyst to aid. in the absorption of the insoluble NO. Or, NOx in Solution can be reduced by the absorbed SO2 to form molecular N2, N2O, or reduced nitrogen compounds such as NOH(SO=3)2, NH2SO-3 and NH+4, while SO2 is Oxidized to sulfate. The kinetics and mechanisms of the reactions involved in these processes, the formation and disappearance of reaction intermediates in the processes are discussed.