溶液吸收结合电化学氧化降解四氢呋喃废气  

Degradation of tetrahydrofuran from exhaust gas via absorption combined with electrochemical oxidation

作　　者：裘盼黎 陈安格 黄立维 陈金媛 徐昕 QIU Pan-li;CHEN An-ge;HUANG Li-wei;CHEN Jin-yuan;XU Xin(College of Environment,Zhejiang University of Technology,Hangzhou 310014,China;Hangzhou Environmental Protection Research Institute of China Coal Technology&Engineering Group,Hangzhou 311201,China)

机构地区：[1]浙江工业大学环境学院,浙江杭州310014 [2]煤科集团杭州环保研究有限公司,浙江杭州311201

出　　处：《高校化学工程学报》2020年第4期1085-1090,共6页Journal of Chemical Engineering of Chinese Universities

基　　金：浙江省科技厅重点研发计划(2017C03007)。

摘　　要：针对目前低浓度四氢呋喃(tetrahydrofuran,THF)废气的处理,提出了一种经济有效的电化学氧化强化溶液吸收去除THF的方法。实验采用圆筒式溶液吸收电化学反应器降解THF,圆筒中心沿轴向设置有RuO2涂层的钛棒阳极,筒内壁附有一层不锈钢网作为阴极,两极的距离约为9 mm。实验结果表明,THF的去除率与电解吸收液的性质有关,在NaCl溶液中的去除率高于Na2SO4溶液,这是因为析氯电极电解NaCl溶液时能产生有效氯间接氧化THF。实验发现THF的去除率也与吸收液的pH有关,在酸性NaCl溶液中的去除率明显高于碱性条件下,当pH约为1时,去除率最高能达到94.8%。此外,还发现采用254 nm的紫外光照射能增加THF的去除率。经检测THF的主要液相降解产物为γ-丁内酯。An economically effective method for low concentration tetrahydrofuran(THF)removal from air stream was proposed by the combination of electrochemical oxidation and solution absorption.A cylindrical reactor was used,and the reactor was consisted of a titanium rod anode with a RuO2 coating layer,and a stainless steel mesh cathode attached to the inner wall of the cylinder.The distance between the anode and cathode was 9 mm.Experimental results show that THF removal is largely affected by electrolytic absorption solution,and THF removal in NaCl solution is higher than that in Na2SO4,which is likely due to the production of effective chlorine for the indirect oxidization of THF by the use of chlorine evolution electrode.The removal of THF is also affected by the pH of solutions.In acidic NaCl solution,the removal of THF is higher than that in alkaline solution.When the pH was adjusted to 1,the removal of THF reached 94.83%.In addition,the degradation of THF is increased with 254 nm ultraviolet light irradiation on the electrode.The main liquid phase product of THF degradation is confirmed to beγ-butyrolactone.

关 键 词：四氢呋喃 水溶液 吸收 电化学氧化 降解 

分 类 号：TQ018[化学工程] TP18[自动化与计算机技术—控制理论与控制工程]