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
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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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