Catalytic hydrodechlorination (HDC) is considered to be a safe and effective method to treat chlorinated organic pollutants and has always been a hot spot in basic catalysis research. It is difficult to obtain excellent catalytic performance due to the inferior mass transfer performances of traditional batch reactors, and the deactivation of catalysts can easily occur due to the poisoning effect of HCl. In this work, Pd catalysts supported on activated carbon (Pd/AC) were synthesized by the ion-exchange (IE) method. The characterization results of N₂ physisorption, XRD, TEM and XPS revealed that the active Pd components were uniformly dispersed on the surface of AC in the form of nanoparticles. A continuous flow system based on a micro-packed bed reactor (μPBR) was developed for the hydrodechlorination, and the hydrogenation of chlorobenzene (CB) was selected as the model reaction. With the optimal reaction conditions, a conversion and selectivity of 100% were obtained. Importantly, no obvious deactivation of the catalysts was observed during a 100 h time-on-stream test. Moreover, Pd/AC catalysts exhibited remarkable substrate suitability in dechlorination systems. The reaction kinetics for hydrodechlorination of CB in methanol was investigated after the internal and external diffusion limitations were eliminated.

中文翻译：

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Pd/AC催化剂上连续流动微填充床反应器中氯化有机化合物的液相催化加氢脱氯

催化加氢脱氯（HDC）被认为是一种安全有效的处理含氯有机污染物的方法，一直是基础催化研究的热点。传统间歇式反应器传质性能较差，难以获得优异的催化性能，且由于HCl的毒化作用，催化剂容易失活。在这项工作中，通过离子交换 (IE) 方法合成了负载在活性炭 (Pd/AC) 上的 Pd 催化剂。_{N 2}的表征结果物理吸附、XRD、TEM 和 XPS 表明，活性 Pd 组分以纳米颗粒的形式均匀分散在 AC 表面。开发了基于微填充床反应器（μPBR）的连续流动系统进行加氢脱氯，并选择氯苯（CB）加氢作为模型反应。在最佳反应条件下，获得了100%的转化率和选择性。重要的是，在 100 小时的运行时间测试期间没有观察到催化剂的明显失活。此外，Pd/AC 催化剂在脱氯系统中表现出显着的底物适用性。在消除了内部和外部扩散限制后，研究了 CB 在甲醇中加氢脱氯的反应动力学。