The direct dehydrogenation of ethylbenzene to styrene is an industrially important chemical reaction that has attracted significant attention. In this study, a mesoporous PBN/cordierite-supported catalyst is prepared, and the experiments are performed in the absence of steam and oxygen using a fixed-bed reactor at different reaction temperatures and ethylbenzene inlet partial pressures. Then, a two-dimensional reaction kinetics and reactor coupled model is developed. The apparent reaction rate constants and adsorption parameters are calibrated and validated. The developed model accurately captures the trend of the yield of each product component and can be applied to optimize the operating conditions. It is found that the maximum production of styrene is 0.341 kmol/m³/h when the reaction temperature, flow rate, and ethylbenzene inlet partial pressure are 873.15 K, 109 mL/min, and 9350 Pa, respectively. The developed coupled model has great potential in the optimal design of direct dehydrogenation of ethylbenzene to styrene.

中文翻译：

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固定床反应器中乙苯直接脱氢制苯乙烯的实验、动力学和反应器模拟研究


乙苯直接脱氢制苯乙烯是工业上重要的化学反应，引起了人们的广泛关注。本研究制备了介孔PBN/堇青石负载催化剂，并在没有蒸汽和氧气的情况下使用固定床反应器在不同反应温度和乙苯入口分压下进行了实验。然后，开发了二维反应动力学和反应器耦合模型。表观反应速率常数和吸附参数经过校准和验证。开发的模型准确捕捉了每个产品组件的产量趋势，可用于优化操作条件。结果表明，当反应温度、流量和乙苯入口分压分别为873.15 K、109 mL/min和9350 Pa时，苯乙烯的最大产量为0.341 kmol/m ³ /h。 。所开发的耦合模型在乙苯直接脱氢制苯乙烯的优化设计中具有巨大的潜力。