Al2O3对非常规Pb/SiO2丙烷脱氢催化剂的稳定作用

IF 4.3 3区工程技术 Q2 ENGINEERING, CHEMICAL Frontiers of Chemical Science and Engineering Pub Date : 2023-06-05 DOI:10.1007/s11705-023-2315-y

Guowei Wang, Lanhui Zhou, Huanling Zhang, Chunlei Zhu, Xiaolin Zhu, Honghong Shan

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引用次数: 2

摘要

与Sn类似，在元素周期表中位于同一基团（IVA）的Pb也可以催化丙烷脱氢为丙烯，同时可以观察到快速失活。为了提高催化剂的稳定性，本研究在Pb/SiO2催化剂中引入了少量的传统载体Al2O3。研究表明，Al2O3增强了与Pb物种的相互作用，可以抑制PbO的还原，减弱Pb物种的团聚和损失。结果，3Al15Pb/SiO2催化剂在150小时以上表现出更高的稳定性。此外，还提出了添加Al2O3后催化剂表面物种变化的简单示意图。

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The stabilization effect of Al2O3 on unconventional Pb/SiO2 catalyst for propane dehydrogenation

Similar to Sn, Pb located at the same group (IVA) in the periodic table of elements, can also catalyze propane dehydrogenation to propene, while a fast deactivation can be observed. To enhance the stability, the traditional carrier Al₂O₃ with a small amount, was introduced into Pb/SiO₂ catalyst in this study. It has been proved that Al₂O₃ can inhibit the reduction of PbO, and weaken the agglomeration and loss of Pb species due to its enhanced interaction with Pb species. As a result, 3Al15Pb/SiO₂ catalyst exhibits a much higher stability up to more than 150 h. In addition, a simple schematic diagram of the change of surface species on the catalyst surface after Al₂O₃ addition was also proposed.

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来源期刊

Frontiers of Chemical Science and Engineering ENGINEERING, CHEMICAL-

CiteScore

7.60

自引率

6.70%

发文量

868

审稿时长

1 months

期刊介绍： Frontiers of Chemical Science and Engineering presents the latest developments in chemical science and engineering, emphasizing emerging and multidisciplinary fields and international trends in research and development. The journal promotes communication and exchange between scientists all over the world. The contents include original reviews, research papers and short communications. Coverage includes catalysis and reaction engineering, clean energy, functional material, nanotechnology and nanoscience, biomaterials and biotechnology, particle technology and multiphase processing, separation science and technology, sustainable technologies and green processing.