Preparation method of catalyst for producing propylene by propane dehydrogenation under carbon dioxide atmosphere

Abstract

The invention belongs to the technical field of catalysts, in particular to a preparation method of a catalyst for producing propylene by propane dehydrogenation under the carbon dioxide atmosphere and an application thereof. The preparation method can overcome the shortcomings of low activity, poor stability, high price and the like of the existing catalyst. An HZSM-5 zeolite with high silicon-aluminum ratio is taken as a carrier, zinc oxide is taken as an active component, the impregnation method in the prior art is adopted for preparing the catalyst, the prepration process is simple convenient, and the cost is low. When the catalyst is used for the reaction for producing the propylene by the propane dehydrogenation under the carbon dioxide atmosphere has the advantages of low price, simple process, high reaction activity, high yield of the propylene, good stability, slow inactivation and the like.

Description

technical field [0001] The invention belongs to the technical field of catalysts, and in particular relates to a preparation method and application of a catalyst for propane dehydrogenation to propylene under a carbon dioxide atmosphere. Background technique [0002] Propylene is an important chemical raw material, which can be used to synthesize materials such as polypropylene, polyacrylonitrile, acrolein, acrylic acid and propylene oxide, as well as to produce plastics, polypropylene fiber, organic glass, epoxy resin and other products. Therefore, the world's demand for propylene is very large, and the propylene produced by traditional petroleum steam cracking and catalytic cracking methods is far from meeting the rapidly growing market demand. With the increasing shortage of petroleum resources, the use of abundant and cheap propane dehydrogenation to propylene has attracted more and more attention. [0003] Although the pure dehydrogenation of propane to propylene has b...

AI Technical Summary

Problems solved by technology

[0004] Ga 2 o 3 and Ga 2 o 3 / TiO 2 It is considered to be a better catalyst (K.Nakagawa et al, Chem.Commun.1998, 1025; K.Nakagawa et al, J.Catal., 2001, 203 , 87; P.Michorezyk et al, Appl.Catal.A, 2003, 251, 425), they have higher reactivity, but the stability of these catalysts is very poor, can not be industrialized

It has been reported in the literature that a catalyst with high silicon-aluminum ratio HZSM-5 zeolite as the carrier and gallium oxide as the active component (Chinese patent ZL 200510025506.9) has good activity and high Stability, but gallium oxide itself is expensive, and the yield of propylene needs to be further improved

Therefore, the lack of catalysts with low price and good performance is the main problem in the field of oxidative dehydrogenation of propane carbon dioxide to produce propylene.