乙二胺合钴-尿素络合法脱除NO的实验研究

Experimental Study on Removal of NO by Using Co(en)_3^(3+) and Urea Complexation

在半连续的鼓泡反应器中,对乙二胺合钴-尿素络合法脱除烟气中的NO进行实验研究.结果表明,向尿素溶液中添加乙二胺合钴可以增大溶液中NO2的氧化度和NO的溶解度,使吸收液的脱硝率有较大的提高;增大氧气浓度、Co(en)3+3浓度、NO进口浓度,脱硝率也随之增加;增大尿素浓度,脱硝率增加的幅度较小;增大烟气流量不利于NO的吸收;当p H值为10.4,温度在60~70℃之间时,吸收液可以保持较高的脱硝率.

Experiments on flue gas denitrification by using Co（en）3 ＋3and urea complexation were performed in a semi-batch bubbling reactor.The results showthat the oxidation degree of NO2,the solubility of NO,and the removal rate of NO are increased by adding Co（en）3 ＋3in the urea solution.The removal rate of NO increases with increasing oxygen concentration,Co（en）3 ＋3concentration and NO inlet concentration,while the removal rate of NO increases slightly with the increase of urea concentration.Increasing gas flowis not conducive to the absorption of NO.The absorption liquid maintains the high removal rate of NO when the p H value is 10.4 and the temperature is between 60 and 70 ℃.