Effect of calcination temperature of alumina on performance of propane dehydrogenation catalysts

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Abstract In view of the adjustment of pore structure and surface acidity for propane dehydrogenation catalyst using alumina as support, the spherical alumina beads with large pores were prepared by extrusion-spheronization method with alginate as binder, and used as the support of catalysts loading Pt and Sn for propane dehydrogenation. The effects of calcination temperature of alumina on crystal phase, pore structure, surface acidity, H₂ reduction of catalysts and catalytic performance of propane dehydrogenation were investigated. The results show that with the increase of calcination temperature, the crystal phase of catalysts present γ→δ→θ→α; the specific surface area of the catalyst decreases gradually; the average pore size increases; both the strong acidity sites and weak acidity sites of the catalyst are declined; the activity of the catalyst first increases and then decreases. Catalysts with alumina support calcined at 700 ℃ has the relatively stronger ability to inhibit Sn reduction and exhibits the best propane conversion and propylene yield due to its suitable pore structure and surface acidity.

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	Articles by authors
	LI Boyuan
	ZHU Shizhen
	WANG Kang
	WANG Xitao

Keywords： alumina； calcination temperature； propane dehydrogenation； pore structure； surface acidity

Received 2021-02-19;

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LI Boyuan, ZHU Shizhen, WANG Kang, WANG Xitao.Effect of calcination temperature of alumina on performance of propane dehydrogenation catalysts[J] Chemcial Industry and Engineering, 2022,V39(1): 33-39

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