The rotating packed bed (RPB) is suitable for catalytic hydrogenation of aromatic nitrocompounds whose reaction rate is limited by the mass transfer rate. However, the matching mechanism between the mass transfer rate and intrinsic reaction rate in the RPB reactor is still unclear. In this work, the matching relationship in the RPB reactor is studied by combining the characteristics of mass transfer and reaction in detail. Effects of various operating conditions on the gas–liquid mass transfer coefficient up to 0.31/s, under working conditions were studied and the mass transfer correlation was proposed. The hydrogenation of p-nitroanisole was used as a probe reaction to analyze the matching mechanism. Various aromatic nitrocompounds in the RPB and stirred tank reactors were investigated. The reaction efficiency of the former is 5–20 times that of the latter, which further explained the universality of the matching mechanism in the RPB reactor.

中文翻译：

---

一种高效的染料中间体生产技术：旋转填充床反应器中芳香族硝基化合物催化加氢的工艺强化


旋转填充床（RPB）适用于芳香硝基化合物的催化加氢，其反应速率受传质速率的限制。然而，RPB反应器中传质速率与本征反应速率之间的匹配机制仍不清楚。本工作结合传质与反应的特点，详细研究了RPB反应器中的匹配关系。研究了不同工况条件对气液传质系数（最高可达0.31/s）的影响，并提出了传质关系式。以对硝基苯甲醚加氢为探针反应，分析匹配机理。研究了 RPB 和搅拌釜反应器中的各种芳香硝基化合物。前者的反应效率是后者的5~20倍，这进一步解释了RPB反应器中匹配机制的普适性。