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

机译：连续羟基生成系统中羟基自由基形成的动力学研究

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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 ·OH and time well fit a third-order model of {C(·OH) = B _(1) × t + B _(2) × t ~(2) + B _(3) × t ~(3) + intercept}. The highest concentration of hydroxyl radicals was 7.98 × 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：首次构造了新颖且简单的连续产生羟基自由基的装置。在本文中，我们专注于制备过程中羟基自由基形成动力学的研究。详细研究了工艺参数（如电解液浓度，石墨用量，施加的电流强度和空气流速）对羟基自由基浓度的影响。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的浓度，石墨用量，施加的电流强度和空气流速而增加，然后降低。 ·OH的浓度和时间很好地符合{C（·OH）= B _（1）×t + B _（2）×t〜（2）+ B _（3）×t〜的三阶模型。 （3）+截距}。在以下条件下，羟自由基的最高浓度为7.98×10〜（？3）mol L〜（？1）：十二烷基苯磺酸钠浓度为10.0％（w / v），石墨用量为5.0 g，施加的电流强度为10 mA ，空气流量为1.0L h〜（Δ1）。我们的羟基自由基生成方法无需使用强酸试剂就可以连续制备更高浓度的羟基自由基。而且，我们的方法通过使用毫安级的电流具有较低的能耗。这是一种绿色有效的生成羟基自由基的方法。羟基自由基生成的动力学研究可以定量预测工艺参数的浓度变化，并且可以很好地预测羟基自由基的生成，这在工业应用中至关重要。

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