Fluidized bed synthesis gas to olefin iron-based catalyst, preparation method and use thereof

Abstract

The invention relates to preparation of an iron-based catalyst t for olefins produced from synthetic gas in a fluidized bed, a preparation method thereof and applications of the catalyst, mainly solving a problem that catalyst carbon deposition in Fischer-Tropsch synthesis has influences on catalyst performances and stability. According to the technical scheme adopted by the catalyst and the preparation method, the catalyst comprises following components by weight: a) 50-100 parts of a carrier having a form of Ti<x>Ca<1-X>O<x+1>, with the x being the molar fraction of Ti and the x being larger than 0.5 and less than 1; b) 5-50 parts of Fe carried on the carrier; c) 1-30 parts of at least one metal or oxide selected from Mn, Zn, Mg, Bi or Cu; and d) 0.1-5 parts of at least one oxide or hydroxide selected from K, Na, Rb or Cs. By the scheme, the problem is solved well and the catalyst can be used in the industrial production of olefins from fluidized bed synthetic gas.

Description

technical field

[0001] The invention relates to an iron-based catalyst for producing olefins from fluidized bed synthesis gas, a preparation method and application thereof. Background technique

[0002] The method of converting synthesis gas into liquid hydrocarbons through catalyst action was invented by German scientists Frans Fischer and Hans Tropsch in 1923, referred to as F-T synthesis, that is, CO undergoes a heterogeneous catalytic hydrogenation reaction on a metal catalyst to produce straight-chain alkanes and alkenes. Master's mixture process. Germany carried out research and development in the 1920s and realized industrialization in 1936. After World War II, it was closed because it could not compete economically with the oil industry; South Africa has abundant coal resources, but lacks oil resources and has long-term Restricted by international social economic and political sanctions, it was forced to develop coal-to-oil industrial technology, and built the first...

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