Catalyst for olefin prepared by synthesis gas and preparation method of catalyst

Abstract

The invention relates to a catalyst for olefin prepared by synthesis gas and a preparation method of the catalyst, and mainly aims to solve the problem of low selectivity of low C2-C4 olefin in fischer-tropsch synthesis. The problem can be well solved by adopting a technical scheme that the catalyst is prepared from the following components in parts by weight: 1-20 parts of a shell which is one of ZSM-5 and beta zeolite and 80-99 parts of a kernel, wherein the kernel comprises the following components in parts by weight: (a) 80-100 parts of a carrier selected from SiO2 or Al2O3, (b) 3-20 parts of at least one metal or oxide of Fe and Co carried on (a), (c) 1-10 parts of at least one metal or oxide of Mn, Zn, Mg and Cu, and (d) 0.1-5 parts of oxide or hydroxide of K, Na, Rb and Cs. The catalyst can be applied to industrial production of olefin preparation by synthesis gas.

Description

technical field

[0001] The invention relates to a catalyst for producing olefins from synthesis gas and a preparation method thereof. Background technique

[0002] Low-carbon olefins (olefins with carbon atoms ≤ 4) represented by ethylene and propylene are the basic raw materials of the chemical industry. At present, the main raw materials of low-carbon olefins in the world are petroleum hydrocarbons, of which naphtha accounts for the majority, and there are Alkanes, hydrogenated diesel oil, some heavy oil, etc. At home and abroad, natural gas or light petroleum fractions are mostly used as raw materials, and low-carbon olefins are produced by steam cracking in ethylene complexes. Steam cracking is a large energy-consuming device in petrochemical industry, and it completely depends on non-renewable petroleum resources. With the increasing shortage of oil resources, it is urgent to find alternative resources. Therefore, the research work of producing olefins from natural g...

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