Two-stage circulating fluidized bed reaction-regeneration system and method for preparing aromatics from syngas

A technology of circulating fluidized bed and regeneration system, which is applied in chemical instruments and methods, preparation of liquid hydrocarbon mixture, and treatment of hydrocarbon oil, etc. It can solve the problems of low conversion rate of synthesis gas and regeneration of catalyst, etc., and achieve heat control , Catalyst pulverization is reduced, and the effect of reducing design difficulty

Active Publication Date: 2021-05-28
TSINGHUA UNIV
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  • Description
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  • Application Information

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Problems solved by technology

However, at present, such catalysts are restricted by chemical balance, the conversion rate of synthesis gas is not high, and the formation of CO 2 The selectivity is relatively high
At the same time, the catalyst for this process needs to be regenerated at high temperature, and there is no such technical report yet

Method used

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  • Two-stage circulating fluidized bed reaction-regeneration system and method for preparing aromatics from syngas

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032]The hydrocarbon synthesis catalyst (iron nitride / alumina, iron nitride mass fraction is 50%, the rest is alumina, the catalyst is 350 microns) and an aromatic catalyst (Ga2O3 / Y molecular sieve / aluminum oxide type, amylide, Y molecular sieve, GA2O3The mass fraction is 60%, 30%, 10%, and the average particle diameter of the catalyst is filled in the first catalyst filling region 1a region of the aromatic reactor 1. The lower region of the aromatic reactor 1 is preheated to 250 ° C, and the syngas (CO and hydrogen) are introduced, the control pressure is 3 MPa, and the aromatic catalyst is blown from the first catalyst assembly zone 1a to the second catalyst assembly area. In 1B, the temperature of the second catalyst assembly zone 1b is controlled is 550 ° C.

[0033]The syngas produces a hydrocarbon in the first catalyst loading region 1a, and the hydrocarbon is further reacted in the second catalyst assembly region 1b to form an aromatic hydrocarbon. The aramid and the subpr...

Embodiment 2

[0038]The hydrocarbon synthesis catalyst (FE / Cr / alumina catalyst, alumina, Fe, and Cr mass fraction is 5%, 20%, 75%, respectively, the average particle diameter of 200 microns) and an aromatic catalyst (ZnO / GA2O3 / ZSM-5 / alumina, alumina, ZSM-5 molecular sieve, GA2O3The ZnO mass fraction is 50%, 35%, 5%, 10%, and the average particle diameter of the catalyst is filled in the reactor in the first catalyst filling region 1a region. The lower region of the reactor was preheated to 380 ° C, and the syngas (CO and hydrogen) were introduced, and the pressure was 2 MPa. The aromatic catalyst was blown from the first catalyst assembly zone 1a to the second catalyst filling region 1b, and the temperature of the second catalyst assembly zone 1b was 450 ° C.

[0039]The syngas produces a hydrocarbon in the first catalyst loading region 1a, and the hydrocarbon is further reacted in the second catalyst assembly region 1b to form an aromatic hydrocarbon. The aramid and the subproduction of li...

Embodiment 3

[0044]The hydrocarbon synthesis catalyst (Co / Mn / alumina / silicon oxide catalyst (Co, Mn, alumina, silicon oxide mass fraction is 0.6%, 0.4%, 70%, 29%, respectively, the catalyst has an average particle size of 270- Micrometer) and aromatic catalyst (MOO3 / FE / β molecular sieve / alumina, among which aluminum oxide, β molecular sieve, MOO3The Fe mass fraction is 58%, 36%, 3%, 3%, and the catalyst has an average particle diameter of 80 microns to fill in the first catalyst filling region 1a region in the reactor. The lower region of the reactor was preheated to 280 ° C, and the syngas (CO and hydrogen) were introduced, and the pressure was 0.1 MPa. The aromatic catalyst was blown from the first catalyst assembly zone 1a to the second catalyst assembly region 1b, and the temperature of the second catalyst filling region 1b was controlled at 480 ° C.

[0045]The syngas produces a hydrocarbon in the first catalyst loading region 1a, and the hydrocarbon is further reacted in the second...

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Abstract

A two-stage circulating fluidized bed reaction-regeneration system and method for preparing aromatics from synthesis gas, comprising an aromatization reactor and a catalyst regeneration reactor, the two are connected to each other through pipelines, and the aromatization reactor includes a first The catalyst loading area and the second catalyst loading area; the catalyst regeneration reactor includes the fourth catalyst loading area and the third catalyst loading area, and the hydrocarbon synthesis catalyst and the aromatization catalyst are filled in the aromatization reactor, and under the action of air flow, The hydrocarbon synthesis catalyst mainly stays in the lower area, and the aromatization catalyst mainly stays in the upper area, and it is announced that after the aromatization catalyst is deactivated, it first enters the low-temperature low-oxygen zone of the catalyst regeneration reactor, and then enters its high-temperature high-oxygen zone. The regeneration method of the zone, the invention realizes the control of different temperatures, and reduces the design difficulty of the catalyst.

Description

Technical field[0001]The present invention relates to the chemical process and the technical field of the apparatus, and in particular, two-stage circulating fluidized bed reaction-regeneration system and method for synthesizing gas prepared aromatic hydrocarbons.Background technique[0002]Synthetic gastric structuring techniques are emerging aromatics production processes, one of which is to form a hydrocarbon intermediate in synthesis gas, and then prepare a aromatic hydrocarbon by hydrocarbons. The selection advantage of two reactions in one reactor is that no complex hydrocarbon components are separated from hydrocarbons and prepared as a high-purity product, so that the separation unit of two processes that operate independently can be effectively merge. The technical challenge is that the original hydrocarbon synthesis catalyst acts in 300-380 ° C, and the hydrocarbon prepares a aromatic catalyst acts in 350-500 ° C. There is currently reported to prepare multi-function composi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J8/26B01J8/18C10G3/00
CPCB01J8/1809B01J8/1845B01J8/26C10G3/57C10G3/62C10G2300/70Y02P30/20
Inventor 骞伟中宋文龙侯一林陈兆辉
Owner TSINGHUA UNIV
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