化工学报2016，Vol.67Issue(6)：2568-2574,7.DOI:10.11949/j.issn.0438-1157.20151659
RuO2/Ti阳极电化学氧化吸收氨废气
Removal of ammonia by absorption combined with electrochemical oxidation on RuO2/Ti anode
徐晓华 1许青枝 1黄桂凤 1王莉莉 1黄立维1
作者信息
- 1. 浙江工业大学环境学院，浙江杭州 310014
- 折叠
摘要
Abstract
Ammonia in the exhaust gas was treated by solution absorption combined with electrochemical oxidation. The electrochemical reactor was a tubular glass reactor (φ35 mm×350 mm) with a stainless steel mesh attached to the inner wall as the cathode, and a titanium rod (φ10 mm×350 mm) coated with RuO2 (RuO2/Ti) fixed on the axis of the reactor as the anode. Electrodes were immersed in absorption solutions. The sample gas containing ammonia was introduced to the reactor by a gas distributor installed at the bottom of the reactor. Experimental results indicated that the removal of ammonia was higher by absorption combined with electrochemical oxidation compared with solution absorption only. The removal of ammonia is higher in NaCl solution than that in Na2SO4 one, which was attributed to the indirect oxidation of active chlorine generated by electrochemical reaction on RuO2/Ti anode. It was confirmed that oxidation of ammonia increased with low pH of NaCl solutions. With the increase of current density applied to the reactor, the decomposition of ammonia also increased. The major of absorbed ammonia in NaCl and Na2SO4 solution converted to nitrogen after electrochemical reaction. Only a small amount of nitrate was found in solutions after reaction.关键词
RuO2/Ti阳极/电化学/溶液/吸收/氨/废气Key words
RuO2/Ti anode/electrochemistry/solution/absorption/ammonia/exhaust分类
资源环境引用本文复制引用
徐晓华,许青枝,黄桂凤,王莉莉,黄立维..RuO2/Ti阳极电化学氧化吸收氨废气[J].化工学报,2016,67(6):2568-2574,7.
