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吸附DBP饱和活性炭的低温等离子体再生实验

DOI: 10.13336/j.1003-6520.hve.2015.10.044, PP. 3505-3511

Keywords: 等离子体,介质阻挡放电,高频,粒状活性炭,邻苯二甲酸-二丁酯,炭损率

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Abstract:

为研究放电等离子体对吸附有机物活性炭的再生过程,利用低温等离子体高效产生强氧化性活性粒子的特点,探讨了高频介质阻挡放电(DBD)低温等离子体对吸附邻苯二甲酸-二丁酯(DBP)的粒状活性炭(GAC)的再生效果。考察了DBD放电参数(电压、频率、电极间距)、反应时间、GAC干湿状态、再生量、循环再生次数等因素对再生效果的影响。研究结果表明适度提高电压峰值或频率、适度湿润GAC都有助于再生效果的提升;相反,过度提高电压或频率、干燥的GAC都会降低GAC的再生效果。系统电压10kV,频率10kHz,放电间距10mm,质量2g的含水体积分数为45%的湿GAC再生率高达80%以上;经过3次循环再生处理后,总炭损率低于5.0%,再生率高于70%。系统活性粒子数量、GAC微孔坍塌程度、活性粒子(如O3等)受热分解均是决定再生率高低的重要影响因素。

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