等离子体/准分子灯一体化装置降解甲苯

蒋一飞; 叶招莲; 文颖频; 席志楠; 邹梦君

doi:10.7524/j.issn.0254-6108.2014.12.008

环境化学

等离子体/准分子灯一体化装置降解甲苯

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蒋一飞, 叶招莲, 文颖频, 席志楠, 邹梦君. 等离子体/准分子灯一体化装置降解甲苯[J]. 环境化学, 2014, 33(12): 2176-2184. doi: 10.7524/j.issn.0254-6108.2014.12.008

引用本文:

蒋一飞, 叶招莲, 文颖频, 席志楠, 邹梦君. 等离子体/准分子灯一体化装置降解甲苯[J]. 环境化学, 2014, 33(12): 2176-2184. doi: 10.7524/j.issn.0254-6108.2014.12.008

JIANG Yifei, YE Zhaolian, WEN Yingpin, XI Zhinan, ZOU Mengjun. Abatement of toluene with integrated plasma and excilamp lamp reactor[J]. Environmental Chemistry, 2014, 33(12): 2176-2184. doi: 10.7524/j.issn.0254-6108.2014.12.008

Citation:

JIANG Yifei, YE Zhaolian, WEN Yingpin, XI Zhinan, ZOU Mengjun. Abatement of toluene with integrated plasma and excilamp lamp reactor[J]. Environmental Chemistry, 2014, 33(12): 2176-2184. doi: 10.7524/j.issn.0254-6108.2014.12.008

等离子体/准分子灯一体化装置降解甲苯

1.
江苏理工学院化学与环境工程学院, 常州, 213001
基金项目:
国家自然科学基金资助项目(51108211), 常州市科技计划项目(CJ20130033), 江苏省高等学校大学生创新创业训练计划项目(201311463017Z)资助.

Abatement of toluene with integrated plasma and excilamp lamp reactor

1.
College of Chemistry and Environmental Engineering, Jiangsu University of Technology, Changzhou, 213001, China
Fund Project:

摘要: 采用一种新型的气体降解装置,即一个电源同时产生介质阻挡放电(Dielectric barrier discharge, DBD)等离子体和KrCl*准分子紫外辐射(DBD/UV)的一体化装置降解甲苯.研究表明,DBD等离子体与222 nm KrCl*准分子灯都可以单独降解甲苯气体,但UV无法使甲苯气体完全降解为水和二氧化碳.相同的能量密度下,一体化的DBD/UV降解甲苯气体的去除率高于单独使用DBD和UV之和,说明一体化装置中两者联合起到了耦合作用.相同条件下, DBD/UV比单独DBD时能量效率、碳平衡、CO2选择性都有所提高,且生成的副产物O3有所降低,说明DBD/UV可以有效地抑制O3的生成.同时,考察了DBD/UV降解甲苯的影响因素,对比分析了不同外施电压下的降解产物, 主要产物为苯甲醛、酸酐、脂肪醛类、醇类等.推测DBD/UV降解甲苯基于3个方面:甲苯吸收222 nm光子直接光解、DBD中高能电子及活性粒子氧化降解甲苯及两者的协同作用.
- DBD/UV /
- 甲苯 /
- KrCl^*准分子 /
- 副产物
Abstract: In this paper, a new-type gas degradation integrated reactor that simultaneously produced dielectric barrier discharge (DBD) plasma and UV radiation from KrCl* excimer with one power supply (named as DBD/UV) was used for toluene abatement. Both DBD plasma and 222nm KrCl* excimer UV decomposed toluene alone, but toluene was not transformed totally into H2O and CO2 if excilamp was used alone. At the same specific energy density, removal efficiency of toluene was higher with integrated DBD/UV than the sum of DBD and UV, demonstrating synergistic effects. Under the same conditions, integrated DBD/UV represented higher performance than DBD alone with respect to energy yield, carbon balance and CO2 selectivity. Lowered production of byproduct O3 indicated that O3 might be inhibited effectively with DBD/UV technology. Meanwhile, influence factors were investigated and degradation products under different applied voltages were compared. The results showed that main byproducts were benzaldehyde, acid anhydride, aliphatic aldehyde, alchhol, and so on. It was inferred that toluene was decomposed by DBD/UV via three channels: direct photolysis by absorbing 222nm photons, oxidation by high-energy electrons and active particles, and synergetic effect between UV and plasma.
- DBD/UV /
- toluene /
- KrCl^* excimer /
- byproduct

[1]	竹涛, 李坚, 梁文俊, 等. 非平衡等离子体联合技术降解甲苯气体[J]. 环境科学学报, 2008,28(11): 2299-2304
[2]	Van Durme J, Dewulf J, Sysmans W, et al. Abatement and degradation pathways of toluene in indoor air by positive corona discharge[J]. Chemosphere, 2007, 68(10): 1821-1829
[3]	卜龙利, 刘海楠, 王晓晖, 等. 不同加热方式下催化氧化甲苯的性能研究[J]. 环境化学, 2013, 32(8): 1524-1531
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蒋一飞, 叶招莲, 文颖频, 席志楠, 邹梦君. 等离子体/准分子灯一体化装置降解甲苯[J]. 环境化学, 2014, 33(12): 2176-2184. doi: 10.7524/j.issn.0254-6108.2014.12.008

引用本文:

蒋一飞, 叶招莲, 文颖频, 席志楠, 邹梦君. 等离子体/准分子灯一体化装置降解甲苯[J]. 环境化学, 2014, 33(12): 2176-2184. doi: 10.7524/j.issn.0254-6108.2014.12.008

Citation:

等离子体/准分子灯一体化装置降解甲苯

1. 江苏理工学院化学与环境工程学院, 常州, 213001

收稿日期: 2014-03-02

基金项目:

国家自然科学基金资助项目(51108211), 常州市科技计划项目(CJ20130033), 江苏省高等学校大学生创新创业训练计划项目(201311463017Z)资助.

关键词:

DBD/UV /
甲苯 /
KrCl^*准分子 /
副产物

摘要: 采用一种新型的气体降解装置,即一个电源同时产生介质阻挡放电(Dielectric barrier discharge, DBD)等离子体和KrCl*准分子紫外辐射(DBD/UV)的一体化装置降解甲苯.研究表明,DBD等离子体与222 nm KrCl*准分子灯都可以单独降解甲苯气体,但UV无法使甲苯气体完全降解为水和二氧化碳.相同的能量密度下,一体化的DBD/UV降解甲苯气体的去除率高于单独使用DBD和UV之和,说明一体化装置中两者联合起到了耦合作用.相同条件下, DBD/UV比单独DBD时能量效率、碳平衡、CO2选择性都有所提高,且生成的副产物O3有所降低,说明DBD/UV可以有效地抑制O3的生成.同时,考察了DBD/UV降解甲苯的影响因素,对比分析了不同外施电压下的降解产物, 主要产物为苯甲醛、酸酐、脂肪醛类、醇类等.推测DBD/UV降解甲苯基于3个方面:甲苯吸收222 nm光子直接光解、DBD中高能电子及活性粒子氧化降解甲苯及两者的协同作用.

English Abstract

Abatement of toluene with integrated plasma and excilamp lamp reactor

1. College of Chemistry and Environmental Engineering, Jiangsu University of Technology, Changzhou, 213001, China

Received Date: 2014-03-02

Fund Project:

Keywords:

DBD/UV /
toluene /
KrCl^* excimer /
byproduct

Abstract: In this paper, a new-type gas degradation integrated reactor that simultaneously produced dielectric barrier discharge (DBD) plasma and UV radiation from KrCl* excimer with one power supply (named as DBD/UV) was used for toluene abatement. Both DBD plasma and 222nm KrCl* excimer UV decomposed toluene alone, but toluene was not transformed totally into H2O and CO2 if excilamp was used alone. At the same specific energy density, removal efficiency of toluene was higher with integrated DBD/UV than the sum of DBD and UV, demonstrating synergistic effects. Under the same conditions, integrated DBD/UV represented higher performance than DBD alone with respect to energy yield, carbon balance and CO2 selectivity. Lowered production of byproduct O3 indicated that O3 might be inhibited effectively with DBD/UV technology. Meanwhile, influence factors were investigated and degradation products under different applied voltages were compared. The results showed that main byproducts were benzaldehyde, acid anhydride, aliphatic aldehyde, alchhol, and so on. It was inferred that toluene was decomposed by DBD/UV via three channels: direct photolysis by absorbing 222nm photons, oxidation by high-energy electrons and active particles, and synergetic effect between UV and plasma.

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等离子体/准分子灯一体化装置降解甲苯

Abatement of toluene with integrated plasma and excilamp lamp reactor

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等离子体/准分子灯一体化装置降解甲苯

English Abstract

Abatement of toluene with integrated plasma and excilamp lamp reactor

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