Hierarchical-hole molecular sieve catalyst for preparation of ethylene through dehydration of low-concentration ethanol, and preparation method and application thereof

Abstract

The invention relates to a hierarchical-hole HZSM-5 catalyst suitable for a reaction for preparation of ethylene through dehydration of low-concentration ethanol, and is used for mainly solving the problems of low catalyst activity, poor catalyst stability, easy loss of active metals and the like existing in the prior art. The invention also relates to preparation of the modified catalyst and an application of the modified catalyst in the reaction for preparation of ethylene through dehydration of low-concentration ethanol. The molecular sieve catalyst can convert ethanol into ethylene with high conversion rate and high selectivity, and has the advantages of high activity at low temperature, good stability, high selectivity of ethylene, long catalytic life and the like.

Description

technical field

[0001] The invention belongs to the field of preparation of catalysts for ethanol dehydration to ethylene, in particular to a mesoporous and hierarchically porous modified molecular sieve catalyst suitable for ethanol dehydration to ethylene, a preparation method thereof, and the use of the catalyst in the reaction of low-concentration ethanol dehydration to ethylene Applications. Background technique

[0002] Ethylene is an important basic chemical raw material. At present, its industrial production mainly comes from the pyrolysis of petroleum. However, as we all know, this method not only produces a large amount of greenhouse gases and wastes and causes environmental degradation while providing chemical raw material ethylene, but also uses non-renewable fossil resources as raw materials. With the shortage of global oil resources and the deterioration of environmental conditions, this technology is becoming less and less competitive. As a green and sustain...

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