微波无极光降解甲硫醚

doi:10.3969/j.issn.0438-1157.2014.11.052

化工学报 ›› 2014, Vol. 65 ›› Issue (11): 4579-4585.DOI: 10.3969/j.issn.0438-1157.2014.11.052

微波无极光降解甲硫醚

张婷婷, 祁蕾, 于洋, 余江

北京化工大学化工学院环境催化与分离过程研究组, 北京 100029

收稿日期:2014-04-15 修回日期:2014-07-08 出版日期:2014-11-05 发布日期:2014-11-05
通讯作者: 余江
基金资助:
国家自然科学基金项目(21076019);中央高校科研业务费(YS1401);首都蓝天行动培育专项(Z141100001014016).

Photolysis of dimethyl sulfide by microwave electrodeless discharge lamp

ZHANG Tingting, QI Lei, YU Yang, YU Jiang

Research Group of Environmental Catalysis and Separation Process, School of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, China

Received:2014-04-15 Revised:2014-07-08 Online:2014-11-05 Published:2014-11-05
Supported by:
supported by the National Natural Science Foundation of China (21076019), the Fundamental Research Funds for the Central Universities (YS1401) and the Capital Development Project for Blue Sky(Z141100001014016).

摘要/Abstract

摘要： 采用微波无极灯(MEDL)光解甲硫醚气体,结果表明,随着进气浓度的增加,甲硫醚去除率相应降低,但其绝对处理量却相应增加;停留时间越长,去除率越大,停留时间为10 s时,降解率高达94.3%.微波无极光化学反应系统中主要产生直接光解、光诱导产生的激发态氧原子O(¹D)和羟基自由基的氧化作用,可将甲硫醚降解转化为硫酸盐、二氧化碳和水等无机化合物,其中激发态氧原子O(¹D)的含量是影响甲硫醚降解的关键因素.

关键词: 甲硫醚, 微波无极灯, 降解, 氧化, 激发态氧原子

Abstract: Photolysis of dimethyl sulfide (DMS) by microwave electrodeless discharge lamp (MEDL) was conducted in this study. Removal efficiency decreased with increasing inlet concentration of DMS, but could be increased to 94.3% while residence time of DMS in the photo-reactor was kept at 10 s. Direct photolysis and indirect photo-oxidation by excited states of atomic oxygen O(¹D) and radical·OH were regarded as the contribution to DMS degradation in MEDL, especially, O(¹D) played the key role of oxidative species in mineralizing DMS to inorganic chemicals, such as SO₄²^-, CO₂ and H₂O.

Key words: dimethyl sulfide, microwave electrodeless discharge lamp, degradation, oxidation, excited states of atomic oxygen

中图分类号:

X511

张婷婷, 祁蕾, 于洋, 余江. 微波无极光降解甲硫醚[J]. 化工学报, 2014, 65(11): 4579-4585.

ZHANG Tingting, QI Lei, YU Yang, YU Jiang. Photolysis of dimethyl sulfide by microwave electrodeless discharge lamp[J]. CIESC Journal, 2014, 65(11): 4579-4585.

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微波无极光降解甲硫醚

Photolysis of dimethyl sulfide by microwave electrodeless discharge lamp

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