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Catalyst for use in highly selective preparation of gasoline fractions from synthesis gas and preparation method thereof

A high-selectivity, gasoline fractionation technology, applied in the field of Fischer-Tropsch synthesis catalyst and its preparation, to achieve low selectivity, reduce investment costs, and reduce one-time construction costs

Inactive Publication Date: 2010-11-24
WANHUA CHEM GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] It can be seen from the above-mentioned patents and literature reports that although the above-mentioned catalyst can be used to obtain a higher conversion rate of synthesis gas, a higher C 5 -C 20 Selectivity, however capable of directly producing gasoline fractions with high selectivity (C 5 -C 11 ) catalysts have not yet been reported

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Weigh 0.085g RuCl 3 ·3H 2 O was dissolved in 53 ml of deionized water to form a ruthenium chloride solution, and 1.0 g of Beta molecular sieve (produced by Nankai University Catalyst Factory, NKF-6) with a silicon-aluminum ratio of 25 was weighed and added to the above solution. Stir at room temperature for 6h, let stand for 10h, and evaporate to dryness in a water bath at 80°C. Vacuum-dry at 50°C for 12h. After fully grinding, heat up to 300°C for 3h in an air atmosphere at a rate of 1°C / min. The calcined solid powder is pressed into tablets, crushed and sieved to take components of 30-60 meshes as the precursor of the catalyst. Weigh 0.5 g of the precursor of the catalyst and reduce it in a hydrogen atmosphere at 300° C. for 2 hours to obtain a 3 wt % Ru / Beta catalyst.

[0043] The catalytic reaction was carried out in a fixed-bed stainless steel high-pressure micro-fixed-bed reactor, and the reaction conditions were as follows: the reaction temperature was 260°C, ...

Embodiment 2

[0048] Weigh 0.085g RuCl 3 ·3H 2 O was dissolved in 53 ml of deionized water to form a ruthenium chloride solution, and 1.0 g of ZSM-5 molecular sieve (produced by Nankai University Catalyst Factory, NKF-5) with a silicon-aluminum ratio of 100 was weighed and added to the above solution. Stir at room temperature for 10 h, let stand for 12 h, and evaporate to dryness in a water bath at 70 °C. Vacuum-dry at 50°C for 12h. After fully grinding, heat up to 300°C for 3h in an air atmosphere at a rate of 1°C / min. The calcined solid powder is pressed into tablets, crushed and sieved to take components of 30-60 meshes as the precursor of the catalyst. Weigh 0.5 g of the precursor of the catalyst and reduce it in a hydrogen atmosphere at 300° C. for 2 hours to obtain a 3 wt % Ru / ZSM-5 catalyst.

[0049] The catalytic reaction is carried out in a fixed-bed stainless steel high-pressure miniature fixed-bed reactor, and the reaction conditions and analysis conditions are the same as in ...

Embodiment 3

[0053] Weigh 0.085g RuCl 3 ·3H 2 O was dissolved in 53 ml of deionized water to form a ruthenium chloride solution, and 1.0 g of MOR molecular sieve (produced by Nankai University Catalyst Factory, NKF-12) with a silicon-aluminum ratio of 12 was weighed and added to the above solution. Stir at room temperature for 10 h, let stand for 12 h, and evaporate to dryness in a water bath at 70 °C. Vacuum-dry at 50°C for 12h. After fully grinding, heat up to 300°C for 3h in an air atmosphere at a rate of 1°C / min. The calcined solid powder is pressed into tablets, crushed and sieved to take components of 30-60 meshes as the precursor of the catalyst. Weigh 0.5 g of the precursor of the catalyst and reduce it in a hydrogen atmosphere at 300° C. for 2 hours to obtain a 3 wt % Ru / MOR catalyst.

[0054] The catalytic reaction was carried out in a fixed-bed stainless steel high-pressure miniature fixed-bed reactor. The reaction conditions and product analysis were the same as in Example 1...

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Abstract

The invention discloses a catalyst for use in highly selective preparation of gasoline fractions from synthesis gas. The catalyst consists of 0.5 to 10 weight percent of metal ruthenium and the balance of molecular sieve. The preparation method of the catalyst comprises the following steps of: (1) weighing the ruthenium salt according to the proportion and preparing 0.1 to 5 weight percent solution of ruthenium salt; (2) adding the molecular sieve into the solution of ruthenium salt, soaking, stirring and standing for 0 to 24 hours; (3) evaporating the mixture to dryness and drying the evaporated mixture in vacuum; (4) roasting the dried solid matter in the atmosphere of air or inert gas; (5) forming the roasted solid powder; and (6) reducing the formed solid powder in the atmosphere of hydrogen or the hydrogen and the inert gas, wherein the reducing temperature is 200 to 400 DEG C and the reducing time is 0.55 hour. The catalyst is used for Fischer-Tropsch synthesis reaction and has the advantages of remarkably high selectivity for the gasoline fractions such as hydrocarbons containing 5 to 11 carbon atoms, low selectivity for wax hydrocarbons containing more than 20 carbon atomsand capability of effectively reducing the one-time construction cost and the production operation cost of a production device.

Description

technical field [0001] The invention relates to a Fischer-Tropsch synthesis catalyst and a preparation method thereof, more specifically, a Fischer-Tropsch synthesis catalyst of high-yield gasoline fractions and a preparation method thereof. Background technique [0002] Fischer-Tropsch synthesis is synthesis gas (H 2 +CO) is converted into hydrocarbons under the action of a catalyst, and the products are mainly olefins and alkanes, accompanied by the formation of oxygenates and water gas shift reactions. Among them, syngas can be converted from coal, natural gas, biomass, etc. through gasification or reforming. In recent years, with the continuous consumption of petroleum resources, the development of efficient utilization of non-oil-based resources has attracted more and more attention at home and abroad. Companies such as Shell and Sasol have industrialized production devices based on Coal-to-Liquid (CTL) and Gas-to-Liquid (GTL); many companies such as ExxonMobil, Syntr...

Claims

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Application Information

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IPC IPC(8): B01J29/068C10G2/00
Inventor 张庆红康金灿王野华卫琦楼银川张泽绮刘刚
Owner WANHUA CHEM GRP CO LTD
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