Highly Efficient Monolithic Catalyst with Excellent Adhesion of SiO2 Coating for Catalytic Hydrogenation in the Rotating Packed Bed Reactor,Industrial & Engineering Chemistry Research

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Highly Efficient Monolithic Catalyst with Excellent Adhesion of SiO2 Coating for Catalytic Hydrogenation in the Rotating Packed Bed Reactor
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2022-12-07 , DOI: 10.1021/acs.iecr.2c03142
Yu Han _{1,

2} , Yi-Kai Gao _{1,

2} , Bao-Ju Wang _{1,

2} , Xin Zhang _{1,

2} , Guang-Wen Chu _{1,

2} , Yong Luo _{1,

2} , Jian-Feng Chen _{1,

2}

Affiliation

Monolithic catalysts have great potential to be used in rotating packed bed (RPB) reactors due to the advantages of easy installation and structural stability. However, the complex operation environment of liquid scouring and centrifugal force in the RPB reactor leads to the loss of active material from the substrate. In this work, SiO₂ coating was deposited on a nickel foam by the electrodeposition (ED) method to improve the adhesion strength of SiO₂ coating. The adhesion properties were tested from three aspects of mechanical stress, thermal stress, and chemical stress. Compared with the traditional impregnation method and slurry circulation method, the ED method can reduce the mass loss rate from higher than 45% to less than 4%. Moreover, the formation of chemical interactions (Si–O–Ni bond), as characterized by Raman and XPS spectroscopy, illustrated the enhanced adhesion strength by the ED method. The ED method also improved the catalytic performance and reusability of the monolithic catalyst installed in the RPB reactor. This work demonstrates that chemical interactions can be used to enhance the coating adhesion strength and provides a new way to develop stable monolithic catalysts.

中文翻译：

用于旋转填充床反应器催化加氢的 SiO2 涂层具有优异附着力的高效整体催化剂

由于易于安装和结构稳定的优点，整体式催化剂在旋转填充床（RPB）反应器中具有巨大的应用潜力。然而，RPB反应器中液体冲刷和离心力等复杂的操作环境导致活性物质从基体上流失。在这项工作中，通过电沉积 (ED) 方法将 SiO ₂涂层沉积在泡沫镍上，以提高 SiO _{2的附着强度}涂层。从机械应力、热应力和化学应力三个方面测试了粘附性能。与传统的浸渍法和浆液循环法相比，ED法可将失重率从45%以上降低到4%以下。此外，通过拉曼和 XPS 光谱表征的化学相互作用（Si-O-Ni 键）的形成说明了 ED 方法增强的粘合强度。ED 方法还提高了安装在 RPB 反应器中的整体催化剂的催化性能和可重复使用性。这项工作表明，化学相互作用可用于提高涂层的附着强度，并为开发稳定的整体催化剂提供了一种新方法。

更新日期：2022-12-07

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