Fluidized bed catalyst for directly preparing low-carbon olefins from synthesis gas and producing method thereof

Abstract

The invention relates to an iron-based fluidized bed catalyst for directly preparing low-carbon olefins from a synthesis gas and a producing method of the iron-based fluidized bed catalyst. The iron-based fluidized bed catalyst and the preparing method mainly solve the problems that in the existing low-carbon olefin Fischer-Tropsch synthesis technology, the reaction heat removal of a fixed bed is difficult, and the temperature runaway can easily occur, so catalysts can be easily inactivated, and the weight selectivity of the low-carbon olefins is low. Through the technical scheme that the iron-based fluidized bed catalyst comprises the following ingredients in parts by weight: (a) 10 to 70 parts of carriers: the carriers are selected from either zinc oxide or zirconium oxide; (b) 30 to 90 parts of active ingredients: the active ingredients comprise the following compounds with the chemical formula being Fe100AaBbCcOx according to the atomic ratio, wherein A is either V or Ti, B is either Mo or Bi, and C is alkali metal, the problems are perfectly solved. The iron-based fluidized bed catalyst and the preparing method can be used for industrial production of low-carbon olefin direct Fischer-Tropsch synthesis.

Description

technical field [0001] The invention relates to a fluidized bed catalyst used for directly preparing low-carbon olefins from synthesis gas and a production method thereof. Background technique [0002] With the rapid development of my country's economy, the demand for petroleum resources and its products is increasing day by day. my country's energy is characterized by rich coal, little gas, and oil shortage. Lack of oil resources and insufficient domestic oil supply have become a severe reality for my country's energy development. With the development of the national economy, the contradiction between oil supply and demand will continue to expand, and get rid of the energy structure. The dependence on oil resources has become an urgent problem to be solved. This has just prompted people to actively and diligently develop other alternative energy sources, and the environmental pollution caused by the direct combustion of coal has also been paid more and more attention. The ...

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Problems solved by technology

[0007] One of the technical problems to be solved by the present invention is that in the existing technology of Fischer-Tropsch synthesis of low-carbon olefins, it is difficult to remove the heat of the reaction in the fixed bed, and it is easy to overheat, which makes the catalyst easy to deactivate, and the weight selectivity of low-carbon olefins is low. Provide A new fluidized bed catalyst for directly preparing low-carbon olefins from synthesis gas and a production method thereof, the production method uses low-carbon olefins (C 2 = -C 4 = ) as the first product, supplemented by other organic hydrocarbons

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