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供电方式对介质阻挡放电-催化降解苯的影响

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Indexed by:期刊论文

Date of Publication:2009-11-30

Journal:高电压技术

Included Journals:PKU、ISTIC、CSCD、EI、Scopus

Volume:35

Issue:11

Page Number:2759-2763

ISSN No.:1003-6520

Key Words:低温等离子体;介质阻挡放电;双极性脉冲高压;催化;苯;CO_2选择性

Abstract:为研究能量注入方式对等离子体降解有机污染物的影响,分别将交流高压和双极性脉冲高压引入介质阻挡放电反应器,结合Mn催化剂对苯进行降解,研究供电方式对放电特性、苯去除率和产物选择性的影响.结果发现,与交流电源相比,脉冲电源供电下能量在极短的时间里注入到反应器内,产生瞬间大功率放电和高能活性粒子,可以实现对苯的高效降解和较高的CO_2选择性.此外,相同功率下脉冲介质.阻挡放电(DBD)的臭氧质量浓度更多,更有利于与Mn催化剂结合对苯进行降解.在电压为18.8 kV的条件下,对苯的去除率最高可达98%,CO_2转化率可达77%.

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