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介质阻挡放电-催化降解空气中甲苯的研究

Keywords: 介质阻挡放电,等离子体,催化,臭氧

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Abstract:

着重考察了催化剂分解O3对介质阻挡放电催化降解甲苯效果的影响,对比不同催化剂在3种催化剂结合方式下对O3分解能力及甲苯降解效果。同时研究了影响O3产生及分解的条件——放电电压、水汽和氧含量对甲苯降解的影响。结果表明,催化剂的O3分解能力越强,对甲苯的降解效果越好,O3的催化分解在甲苯降解过程中起重要作用。当放电电压为10kV时,在余辉区和等离子体区加入催化剂,甲苯的去除率分别由无催化剂时候的33.8%提高到55.6%~66.2%和65.2%~74.2%。气流中的水汽对O3的产生和分解都产生不利影响,可降低甲苯的去除率。氧气含量高时,一方面增加O3的产生,另一方面降低催化剂对O3的分解,在O2含量为5%时,甲苯去除效果较佳。

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