DOI: 10.16597/j.cnki.issn.1002-154x.2024.04.001

热处理对Co@MFI催化剂丙烷脱氢性能的影响

谢健鹏，王秀芳，胥月兵，刘冰，刘小浩

江南大学化学与材料工程学院，无锡 214122

**摘要：**Co基催化剂因其低成本和环境友好而有望成为丙烷无氧脱氢制丙烯的工业催化剂。作者通过一锅水热法合成了Co@MFI催化剂，并用于丙烷无氧脱氢制丙烯。实验结果表明，惰性气氛中高温处理可以显著提高Co@MFI催化剂的初始活性。XRD、XPS、H2-TPR等表征结果表明高度分散、难还原的Co(Ⅱ)是脱氢的活性物种，高温惰性气体处理可以通过分子筛表面脱羟基效应除去分子筛表面水，从而增加活性位点。

**关键词：**高温处理，丙烷脱氢，非贵金属，分子筛

Effect of High-temperature Pretreatment on Catalytic Propane Dehydrogenation over Co@MFI Catalysts

Authors: XIE Jianpeng, WANG Xiufang, XU Yuebing, LIU Bing, LIU Xiaohao

Affiliation: School of Chemical and Material Engineering, Jiangnan University, Wuxi 214122, China

Abstract: Cobalt-based catalysts are promising for propane dehydrogenation to propylene due to their low price and environmentally friendly nature. In this work, Co@MFI catalysts were synthesized by a one-pot hydrothermal method using Co(NO3)2 as the cobalt source and tetraethyl orthosilicate (TEOS) as the silicon source, and were used for propane nonoxidative dehydrogenation to propylene. The experimental results proved that high-temperature pretreatment in an inert atmosphere can significantly improve the initial activity of the Co@MFI catalysts. Characterization results of XRD, XPS, H2-TPR showed that highly dispersed and difficult to reduce Co(Ⅱ) was an active species for dehydrogenation. High-temperature inert gas pretreatment can remove surface water via the surface dehydroxylation effect of the catalyst, thereby increasing the number of active sites.

Keywords: high-temperature pretreatment, propane dehydrogenation, non-noble metal, zeolite