Real-time analysis of intermediate products from non-thermal plasma degradation of ethyl acetate in air using PTR-MS: Performance evaluation and mechanism study

被引：19

作者：

Guo, Teng ^{[1
,2
]}

Cheng, Guoxing ^{[3
]}

Tan, Guobin ^{[3
]}

Xu, Li ^{[4
]}

Huang, Zhengxu ^{[1
,2
]}

Cheng, Ping ^{[4
]}

Zhou, Zhen ^{[1
,2
]}

机构：

[1] Jinan Univ, Inst Mass Spectrometry & Atmospher Environm, Guangzhou 510632, Peoples R China

[2] Guangdong Prov Engn Res Ctr On Line Source Apport, Guangzhou 510632, Peoples R China

[3] Guangzhou Hexin Instrument Co Ltd, Guangzhou 510530, Guangdong, Peoples R China

[4] Shanghai Univ, Sch Environm & Chem Engn, Shanghai 200444, Peoples R China

来源：

CHEMOSPHERE | 2021年 / 264卷

基金：

中国国家自然科学基金;

关键词：

Non-thermal plasma; Ethyl acetate; PTR-MS; Trace transient species; Reaction mechanism; VOLATILE ORGANIC-COMPOUNDS; REACTION-MASS-SPECTROMETRY; RISK-ASSESSMENT; DILUTE VOCS; BY-PRODUCTS; REMOVAL; TOLUENE; DECOMPOSITION; OXIDATION; SYSTEM;

D O I：

10.1016/j.chemosphere.2020.128430

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Non-thermal plasma (NTP) has developed into an emerging end-of-pipe technology for treating volatile organic compounds (VOCs) present in unhygienic point source of air streams. In this work, NTP oxidation of low-concentration ethyl acetate was performed in a coaxial double dielectric barrier discharge reactor. The effects of initial ethyl acetate concentration, gas flow rate, and external electrode length on ethyl acetate degradation were systematically investigated as a function of discharge power. In addition, detailed real-time and online proton transfer reaction mass spectrometry analysis was used to identify the transient species formation and transition in the various NTP oxidation periods of ethyl acetate. Based on the analysis of organic by-products, the degradation mechanism was speculated and the major reaction channels were presented. This study would deepen the understanding of plasma degradation of VOCs and reveal the plasma-chemical mechanism. (C) 2020 Published by Elsevier Ltd.

引用

页数：8