High temperature, high pressure slurry bed reactor Fischer-Tropsch synthesis system and its process

Abstract

The invention discloses a Fischer-Tropsch synthesis system and a Fischer-Tropsch synthesis process of a high-temperature high-pressure slurry bed reactor. The Fischer-Tropsch synthesis system comprises at least one high-temperature high-pressure slurry bed reactor, at least one gas-liquid separating unit and at least one solid-liquid separating unit, wherein high-temperature high-pressure Fischer-Tropsch synthesis reaction is carried out on gas-liquid-solid three-phase reactant flow in the reactor under the action of the catalyst; the high temperature is 260 DEG C to 290 DEG C; the high pressure is 6 MPa-12MPa; at least one gas-liquid separating unit is used for separating the gaseous reaction product and / or the steam into a condensable liquid product and an un-condensable gas product; and at least one solid-liquid separating unit is used for separating the solid catalyst from the formed liquid Tropsch wax. The Fischer-Tropsch synthesis system disclosed by the invention has the advantages of being small in equipment dimension, high in reaction speed and high in quality in byproduct steam.

Description

technical field [0001] The present invention relates to one. Background technique [0002] The Fischer-Tropsch synthesis reaction refers to the synthesis gas (H 2 +CO) is converted into hydrocarbons and other chemicals under the action of a catalyst at a certain temperature and pressure. In recent years, due to the increasing shortage of petroleum resources and the continuous rise of crude oil prices, Fischer-Tropsch synthesis has attracted extensive attention from researchers all over the world. Generally, the reaction of Fischer-Tropsch synthesis to generate hydrocarbons can be represented by the following reaction formula: [0003] mCO+(2m+1)H 2 →C m h 2m+2 +mH 2 O(1) [0004] mCO+2mH 2 →C m h 2m +mH 2 O(2) [0005] 2mCO+(m+1)H 2 →C m h 2m+2 +mCO 2 (3) [0006] Fischer-Tropsch synthesis reactions are usually carried out in Fischer-Tropsch synthesis reactors, such reactors include fixed bed reactors, circulating fluidized bed reactors, fixed fluidized bed ...

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Problems solved by technology

[0010] Compared with the conventional Fischer-Tropsch synthesis method, the above-mentioned documents have adopted a high pressure of 2.0-6.0 MPa and a low temperature of 200-250 ° C, which will inevitably cause the following problems: the reaction product is desorbed from the active site of the catalyst and in the inner channel. Diffusion is limited, and at the same time, high-carbon hydrocarbons are easy to form at high pressure and low temperature, and high-carbon hydrocarbons will block the pores of the catalyst, thereby accelerating the deactivation of the catalyst

[0014] Simultaneously, only increase the reaction pressure of Fischer-Tropsch synthesis reactor, can produce some problems as existing in the method in above-mentioned patent document, especially, high pressure can damage catalyst, make catalyst deactivation prematurely, like this, in some cases down, even the loss outweighs the gain

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