Reaction system for bubbling tower type Fischer-Tropsch synthesis slurry bed

Abstract

A Fischer-Tropsch (FT) synthesis system, characterized in that the FT synthesis process of bringing synthesis gas continuously fed from the bottom of a bubble column type slurry-bed reactor into contact with suspended catalyst particles in the reactor to form liquid hydrocarbons, gaseous hydrocarbons, and water, the process of separating the catalyst particles from the liquid product in a separator, the process of transferring the gaseous product to the separator and withdrawing it from the top of the separator, the process of withdrawing the liquid product from the intermediate section of the separator, and the process of withdrawing a concentrated slurry of catalyst particles from the bottom of the separator and circulating it to the bottom of the reactor are conducted by the driving force of synthesis gas which is introduced to the bottom of the reactor and ascends in the reactor.

Description

technical field [0001] The present invention relates to a bubble column type slurry bed reaction system and device for converting synthesis gas consisting of hydrogen and carbon monoxide into liquid hydrocarbon products in the presence of a suspended Fische-Tropsch synthesis catalyst . Background technique [0002] The Fischer-Tropsch synthesis reaction is to react the synthesis gas composed of hydrogen and carbon monoxide in the presence of a solid catalyst to generate a hydrocarbon mixture of paraffin and olefins with a relatively wide molecular weight distribution. In particular, liquid hydrocarbons are attracting attention as clean automotive fuels. [0003] The Fischer-Tropsch synthesis reaction is characterized by an extremely high exotherm. For example, in the following general formula (1) for synthesizing saturated hydrocarbons, the calorific value per 1 kgmol of carbon monoxide reaches about 40 Mcal. [0004] (chemical formula 1) [0005] nCO+2nH 2 →-(CH 2 ) ...

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Problems solved by technology

In addition, although it is a slurry bed reactor suitable for efficiently removing reaction heat, its cooling mechanism is not disclosed

[0012] Furthermore, as described in the above-mentioned Patent Document 6, in the case of hydrocyclone separation, when the catalyst and the liquid hydrocarbon product are separated and exported from the slurry, since external power such as a pump is used, there is the following problem: the catalyst Particles are heavily loaded, and catalyst particles are pulverized, causing performance degradation, resulting in low production efficiency of FT synthetic oil

In addition, there is a problem that the operating cost required for external power increases and it is difficult to reduce the cost

In addition, although Patent Document 6 also relates to a slurry bed reactor suitable for efficiently removing reaction heat, it does not disclose its cooling mechanism.

[0013] As mentioned above, in the bubble column type slurry bed reaction system, the operating system for separating and deriving the catalyst and the liquid hydrocarbon product from the slurry composed of gas-liquid-solid three-phase is complicated, and it is desired to improve it to a simpler one. operating system

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