CATALYST, AND METHOD FOR DIRECT CONVERSION OF SYNGAS TO PREPARE LIGHT OLEFINS

    公开(公告)号:EP3632557A1

    公开(公告)日:2020-04-08

    申请号:EP18810439.2

    申请日:2018-08-02

    摘要: The present invention belongs to direct synthesis of light olefinss from syngas, and particularly relates to a catalyst and a method for synthesis of light olefinss via direct conversion of syngas. The method uses syngas as the feed raw material, and the conversion process is conducted in a fixed bed or a moving bed. The catalyst is a composite catalyst comprising components A and B (A+B) and is formed by compounding catalyst A and catalyst B in a mechanical mixing mode. The active ingredient of catalyst A is metal oxide; and catalyst B is an oxide supported zeolite. A carrier is one or more than one of porours Al 2 O 3 , SiO 2 , TiO 2 , ZrO 2 , CeO 2 , MgO and Ga 2 O 3 ; the zeolite is one or more than one of CHA and AEI structures, wherein the loading of the zeolite is 4%-45%wt. A weight ratio of the active ingredients in the catalyst A and the catalyst B is within a range of 0.1-20 times, and preferably 0.3-5. The reaction process has extremely high light olefins selectivity; the sum of the selectivity of the light olefins comprising ethylene, propylene and butylene can reach 50-90%, while the selectivity of a methane byproduct is less than 15%. The present invention has excellent application prospect.