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环境化学  2015 

H2O超声过程中H2O2生成动力学

Keywords: 超声,空化,H2O2,动力学

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Abstract:

采用50kHz超声清洗槽式声化学反应器,以纯水为空化液体,研究了超声过程中H2O2生成动力学.分别探讨了空化气体种类(Ar,O2)及组成与流量、空化液体体积与反应器形状对H2O2生成速率及产率的影响.结果表明,超声过程中H2O2的生成可采用零级反应动力学方程来进行描述.在此频率下和考察范围内,采用Ar作为空化气体比O2更有利于H2O2的生成.当混合气体组成为Ar∶O2=70∶30(V/V)时,H2O2的生成速率最快.随着空化气体流量的增加,H2O2产率增加,随后降低.增加空化液体的体积,H2O2的生成速率降低.与锥形瓶相比,圆底烧瓶中H2O2的产率明显降低.

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