Catalyst used for direct preparation of light olefin from synthetic gas, preparation method and application thereof

A technology of low-carbon olefins and catalysts, which is applied in the field of catalysts and preparations for direct production of low-carbon olefins from syngas, which can solve the problems of high catalyst loading, high cost, complex synthesis technology, etc., and achieve low selectivity and reduced Machine and energy requirements, effect of simplified process
CN103157489AInactive Publication Date: 2013-06-19SHANXI LUAN MINING GRP +1
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
SHANXI LUAN MINING GRP
Publication Date
2013-06-19
Estimated Expiration
Not applicable · inactive patent
Patent Text Reader

Abstract

The invention relates to a catalyst used for direct preparation of light olefin from synthetic gas, a preparation method and an application thereof. According to the invention, a parallel flow precipitation method is used to highly disperse Fe and auxiliary agents on surfaces of self-made alkaline carriers, and thus a catalyst load is low, a preparing technology is simple and a cost is lower than that of product with a same type. When the catalyst is used for direct preparation of the light olefin from the synthetic gas, a CO conversion rate can reach 75-85 % under a one-way catalytic condition of the synthetic gas, an alkene-alkane ratio can reach 4.5-6.0 in organic gas products, an alkene weight is 50-60 % and more than 98% of the liquid product is water. The catalyst is good in abrasion resistance and pressure resistance, and can be used for slurry beds and fixed beds. A reaction technology of the catalyst is that the temperature is 200-500 DEG C, a pressure is 0-5 MPa, and an air speed of the synthetic gas is 600-2400 <-1>.
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Description

technical field

[0001] The invention belongs to the technical field of catalysts, and in particular relates to a catalyst for directly producing low-carbon olefins from synthesis gas, a preparation method and application thereof. Background technique

[0002] Catalytic production of low-carbon olefins using syngas as raw material, including indirect method and direct method: the indirect method includes syngas synthesis of methanol, and then methanol cracking to produce low-carbon olefins (MTO method) and synthesis gas through dimethyl ether to produce low-carbon olefins Carbon olefin process (SDTO method).

[0003] The direct method is the direct synthesis of light olefins from syngas without intermediate products (STO method). At present, many scientific research institutions and enterprises at home and abroad have conducted research in this area.

[0004] The patent CN1065026A declared by the Lanzhou Institute of Chemical Physics uses a catalyst prepared by a variety of ...

Claims

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