A monolithic titanium silicalite-1 (TS-1) catalyst was prepared by coating TS-1 onto a specially designed stainless-steel support. The catalyst was used in 1-butene epoxidation, a strong exothermic reaction, to produce butene oxide in a fixed-bed reactor. Compared with the traditional extruded TS-1, the monolithic catalyst demonstrates excellent catalytic stability and reusability. To understand the reason for this performance, heat conduction behaviors of the monolithic and extruded catalysts were studied and compared. This was accomplished by firstly developing a kinetic model to determine reaction kinetic parameters, and then simulating the temperature distribution within the reactor. It revealed a much lower temperature-rise over the monolithic catalyst than over the extruded catalyst. This study demonstrates that the stainless-steel support of the monolithic catalyst is effective in dissipating high reaction heat of 1-butene epoxidation, thus limits local temperature-rise within the reactor. This inhibits the formation of channel-blocking byproducts and improves the catalytic stability.

中文翻译：

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用于 1-丁烯环氧化的高度稳定的整体式钛硅沸石-1 催化剂

通过将 TS-1 涂覆到专门设计的不锈钢载体上，制备了整体式钛硅沸石-1 (TS-1) 催化剂。该催化剂用于 1-丁烯环氧化反应，这是一种强放热反应，可在固定床反应器中生产氧化丁烯。与传统的挤压 TS-1 相比，整体催化剂表现出优异的催化稳定性和可重复使用性。为了了解这种性能的原因，研究并比较了整体式和挤压式催化剂的热传导行为。这是通过首先开发动力学模型以确定反应动力学参数，然后模拟反应器内的温度分布来实现的。它揭示了整体式催化剂的温升比挤出催化剂低得多。该研究表明，整体式催化剂的不锈钢载体可有效散发 1-丁烯环氧化反应的高反应热，从而限制反应器内的局部温升。这抑制了通道阻塞副产物的形成并提高了催化稳定性。