Catalyst for coproduction of synthesis gas prepared gasoline and low carbon olefin and preparation method of catalyst

Abstract

The invention discloses a catalyst for coproduction of synthesis gas prepared gasoline and low carbon olefin and a preparation method of the catalyst. The preparation method of the catalyst comprisesthe following steps that (1) EDTA, EDTA2Na and Fe(NO3)3.9H2O are added into water, a uniform Fe-EDTA-EDTA2Na complexing solution without precipitates is prepared, in the complexing solution, the content of Fe is 10wt% of the weight of a gamma-Al2O3 carrier, and the molar ratio of Fe to the EDTA to the EDTA2Na is 2:1:1; (2) the gamma-Al2O3 carrier is added into the Fe-EDTA-EDTA2Na complexing solution, after uniform mixing, drying is conducted for staying overnight, and thus a solid is obtained; (3) the solid is ground into powder; and (4) the powder is roasted for 4-6 h at the temperature of 500-600 DEG C, and thus Fe-Na / gamma-Al2O3 powder is obtained. The catalyst for coproduction of the synthesis gas prepared gasoline and the low carbon olefin and the preparation method of the catalyst have the beneficial effects that through the catalyst prepared through the method, the selectivity of C5-C11 hydrocarbons can be improved, the olefin and alkene ratio of C2-C4 hydrocarbons can be increased, generation of a non-ideal product CH4 can be further inhibited, and the catalyst is suitable for being applied to F-T synthesis of synthesis gas and is one of the optimal catalysts for coproduction of the synthesis gas prepared gasoline and the low carbon olefin.

Description

technical field [0001] The invention relates to a catalyst and a preparation method thereof, in particular to a catalyst for producing gasoline from synthesis gas for co-production of low-carbon olefins and a preparation method thereof, and belongs to the technical field of catalysts. Background technique [0002] my country's energy reserves are characterized by rich coal, poor oil, and little gas. This coal-based energy structure has led to increasingly prominent environmental problems. [0003] Synthesis gas (CO and H 2 mixed gas), which can not only produce clean fuels and high value-added chemicals through Fischer-Tropsch synthesis (Fischer-Tropsch process, referred to as F-T synthesis), but also effectively alleviate environmental problems in the process of coal resource utilization, so it has been Widespread concern. [0004] The use of synthesis gas to produce gasoline fraction hydrocarbons through F-T synthesis has important strategic significance for my country's...

AI Technical Summary

Problems solved by technology

Although many catalysts used in F-T synthesis have been developed, there are still many problems in these catalysts in F-T synthesis. The main problem is: the traditional F-T synthesis is limited by the Anderson-Schulz-Flory (ASF) distribution model Restrictions, low-carbon olefins and gasoline with high added value (C 5 -C 11 ) is less selective

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