Iron catalyst for preparing light olefins by use of synthesis gas and preparation method of iron catalyst

Abstract

The invention relates to an iron catalyst for preparing light olefins by use of synthesis gas and a preparation method of the iron catalyst, aiming at solving the problems that CO conversion rate is low, the light olefin selectivity is low, and the catalyst has low strength and poor stability under a using condition when the synthesis gas is used for preparing the light olefins in the prior art. The iron catalyst is prepared from the following components in parts by weight: (a) 35-90 parts of iron element or oxide thereof; (b) 5-30 parts of at least one element of titanium and zirconium or oxide of at least one of titanium and zirconium; (c) 5-30 parts of at least one element of molybdenum and tungsten or oxide of at least one of molybdenum and tungsten; (d) 0.1-10 parts of at least one element of vanadium and niobium or oxide of at least one of vanadium and niobium; (e) 0.1-10 parts of at least one element of lanthanum and samarium or oxide of at least one of lanthanum and samarium; and (f) 0.5-5 parts of tin or oxide thereof. The iron catalyst can solve the above problems well and can be used for industrial production for preparing light olefins through Fischer-Tropsch synthesis.

Description

technical field [0001] The invention relates to an iron catalyst for producing low-carbon olefins from synthesis gas and a preparation method thereof. Background technique [0002] Low-carbon olefins refer to olefins with carbon atoms less than or equal to 4. Low-carbon olefins represented by ethylene and propylene are very important basic organic chemical raw materials. With the rapid growth of my country's economy, the supply of low-carbon olefins has been in short supply for a long time. At present, the production of low-carbon olefins mainly adopts the petrochemical route of cracking light hydrocarbons (ethane, naphtha, light diesel oil). Due to the increasing shortage of global oil resources and the long-term high price of crude oil, the development of low-carbon olefins industry only relies on oil The tubular cracking furnace process with light hydrocarbons as raw materials will encounter more and more raw material problems, and the production process and raw material...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is the problem of low CO conversion rate and low selectivity of low-carbon olefins in the product in the Fischer-Tropsch synthesis process of low-carbon olefins in the prior art, and provides a new iron catalyst for the production of low-carbon olefins from synthesis gas , when the catalyst is used in Fischer-Tropsch synthesis of low-carbon olefins, it has the advantages of high conversion rate of CO and high selectivity of low-carbon olefins in the product

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