Fischer-Tropsch synthesized Co-based fluidized bed catalyst and preparation method thereof

Abstract

The invention relates to a Fischer-Tropsch synthesized Co-based fluidized bed catalyst and a preparation method thereof, mainly solving the problems existing in the prior art because an Fischer-Tropsch synthesis reaction is a strong exothermic reaction which causes thermal withdrawal difficulty in a reactor, temperature runaway and easy catalyst inactivation in case of using a fixed bed, and relatively low selectivity of heavy hydrocarbon in case of using a fluidized bed. By adopting the preparation method and the technical scheme that at least one of oxides of Si or Al or a mixture of the atleast one oxide and ZrO2 is selected as a carrier, and the active constituent contains the following composition with a chemical formula in the atomic ratio of Co100AaBbOx, wherein A is selected fromat least one of alkali metal or alkaline earth metal, B is selected from at least one of Cr, Ni, Cu and Zn to be combined into a catalyst, the invention favorably solves the problems and can be used in the industrial production of the Fischer-Tropsch synthesis reaction.

Description

technical field [0001] The invention relates to a cobalt-based fluidized bed catalyst for Fischer-Tropsch synthesis and a preparation method 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 linear alkanes and Olefin-based mixture process. Since P.Sabatier and J.D.Senderens discovered CO hydrogenation on Ni catalyst to produce methane in 1902, the development of F-T synthesis has gone through a tortuous historical process, and has obtained major improvements and breakthroughs, and has been applied in industry. [0003] After decades of development, Fischer-Tropsch synthesis catalysts have also been greatly developed. Currently, commonly used catalysts are divided into two categories in terms of a...

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Problems solved by technology

[0006] One of the technical problems to be solved by this invention is that in the prior art, because the Fischer-Tropsch synthesis reaction is a strong exothermic reaction, when using a fixed bed, it is difficult to remove heat from the reaction, and it is easy to overheat, which makes the catalyst easily deactivated; when using a fluidized bed , problem of low selectivity, providing a new cobalt-based fluidized bed catalyst for Fischer-Tropsch synthesis