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Kinetic study of hydroxyl radical formation in a continuous hydroxyl generation system

机译：连续羟基生成体系中羟基自由基形成的动力学研究

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摘要

A novel and simple apparatus for the continuous generation of hydroxyl radicals has been constructed for the first time. In this paper, we focused on the investigation into the kinetic study of hydroxyl radical formation in the preparation process. The effects of the process parameters (such as the electrolyte solution concentration, graphite dosage, the applied current strength, and air flow rate) on the concentration of hydroxyl radicals were investigated in detail. The concentration of hydroxyl radicals first increased with the concentration of sodium dodecyl benzene sulfonate electrolyte solution, graphite dosage, applied current strength, and air flow rate, and then decreased. The concentration of boldOH and time well fit a third/bold-order model of {C(boldOH/bold) = B-1 x t + B-2 x t(2) + B-3 x t(3) + intercept}. The highest concentration of hydroxyl radicals was 7.98 x 10(-3) mol L-1 under the following conditions: sodium dodecyl benzene sulfonate concentration 10.0% (w/v), graphite dosage 5.0 g, applied current strength 10 mA, and air flow rate 1.0 L h(-1). Our hydroxyl radical generation method can achieve the preparation of higher-concentration hydroxyl radicals continuously without using strong acid reagents. Moreover, our method has low energy consumption by using milliampere-level current. It is a green and efficient method for the generation of hydroxyl radicals. The kinetic study of hydroxyl radical generation can quantitatively predict the concentration changes with process parameters and provide a good prediction of hydroxyl radical generation, which is crucially important in industrial applications.
机译：用于连续产生羟基自由基的新颖和简单的装置已经是第一次构建的。在本文中，我们专注于调查制备过程中羟基自由基形成的动力学研究。研究了处理参数（例如电解质溶液浓度，石墨剂量，施加的电流强度和空气流速）的效果。详细研究了羟基自由基浓度。羟基自由基的浓度首先随着十二烷基苯磺酸钠电解质溶液，石墨剂量，施加的电流强度和空气流速而增加，然后降低。且粗体浓度且时间良好地适合第三个＆ /粗体＆ -c（＆粗体＆ oh＆ /粗体＆）= b-1 xt + b-2 xt（2）+ b -3 xt（3）+拦截}。在以下条件下，最高浓度的羟基浓度为7.98×10（-3）摩尔L-1：十二烷基苯磺酸钠浓度10.0％（w / v），石墨剂量5.0g，施加电流强度10 mA，气流速率1.0 L H（-1）。我们的羟基自由基产生方法可以在不使用强酸试剂的情况下连续达到高浓度的羟基自由基。此外，我们的方法通过使用毫安级电流具有较低的能耗。它是一种生成羟基自由基的绿色有效方法。羟基发生的动力学研究可以定量地预测过程参数的浓度变化，并提供对羟基自由基产生的良好预测，这在工业应用中是至关重要的。

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  • 来源
    《RSC Advances》 |2018年第71期|共7页
  • 作者

    Wang Xin; Zhang Long;

  • 作者单位

    Changchun Univ Technol Jilin Prov Engn Lab Complex Utilizat Petroresourc Sch Chem Engn Changchun 130012 Jilin Peoples R China;

    Changchun Univ Technol Jilin Prov Engn Lab Complex Utilizat Petroresourc Sch Chem Engn Changchun 130012 Jilin Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;
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