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考察了催化剂壁载方式、涂层载体和Pd负载量对微通道内的硝基苯气-液-固三相催化加氢反应的影响以及其并行放大效应。结果表明,与溶胶-凝胶法相比,浸渍法制备的催化剂涂层性能较好,其转化率、选择性分别达到89.2%和93.8%;采用强酸性、大比表面积的载体有利于反应性能的提高;活性组分Pd负载量为2.00 mg,催化剂活性较好;单通道微反应器内硝基苯加氢反应过程的转化率和选择性均高于多通道微反应器。
The effect of catalyst wall-loading method, coating support and Pd loading on the gas-liquid-solid three-phase catalytic hydrogenation of nitrobenzene in microchannels and their parallel amplification effects were investigated. The results show that, compared with the sol-gel method, the impregnation method prepared catalyst coating performance is good, the conversion rate and selectivity of 89.2% and 93.8% respectively; the use of strong acidity, large specific surface area of the carrier is conducive to the reaction performance The catalytic activity of nitrobenzene hydrogenation in single-channel microreactor was higher than that of multi-channel microreactor.