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Catalyst for Fischer-Tropsch oriented synthesis for gasoline and method for preparing catalyst

A technology of directional synthesis and catalyst, which is applied in the preparation of liquid hydrocarbon mixtures, molecular sieve catalysts, chemical instruments and methods, etc., can solve the problems of increasing the complexity of catalyst preparation, increasing the cost, and requiring higher pore structure characteristics of the pretreatment carrier, etc., to achieve Improve the poor quality of Fischer-Tropsch synthetic gasoline distillates, reduce pipeline blockage, reduce investment costs and operating costs

Active Publication Date: 2015-04-01
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the treatment of these two kinds of catalyst molecular sieve carriers increases the cost of catalyst preparation, and requires higher pore structure characteristics of the pretreated carrier, which also increases the complexity of catalyst preparation.

Method used

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  • Catalyst for Fischer-Tropsch oriented synthesis for gasoline and method for preparing catalyst

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040]Preparation of cobalt-based catalyst 10Co / HZSM-5: Weigh 4.93 g of commercially available cobalt nitrate hexahydrate and add it to 30 ml of deionized water, while stirring for 10 minutes to form a cobalt nitrate solution. Weigh 10 g of ZSM-5 molecular sieve with a silicon-aluminum ratio of 100, add it into the above-mentioned cobalt nitrate solution, and stir at room temperature for 6 hours. Then the solvent in the above suspension was evaporated to dryness, and the evaporated solid was dried in an oven at 80° C. for 12 hours. The dried solid was heated in a muffle furnace to 550°C at a heating rate of 5°C / min, and calcined in an air atmosphere for 4h to obtain a cobalt-based catalyst 10Co / HZSM-5, in which the content of Co was 10% by weight of the catalyst support.

Embodiment 2

[0042] Preparation of cobalt-based catalyst 10Co / HZSM-34: Weigh 4.93 g of commercially available cobalt nitrate hexahydrate and add it to 30 ml of deionized water while stirring for 10 minutes to form a cobalt nitrate solution. Weigh 10 g of ZSM-34 molecular sieve with a silicon-aluminum ratio of 10, add it into the above-mentioned cobalt nitrate solution, and stir at room temperature for 6 h. Then the solvent in the above suspension was evaporated to dryness, and the evaporated solid was dried in an oven at 80° C. for 12 hours. The dried solid was heated in a muffle furnace to 550°C at a heating rate of 5°C / min, and calcined in an air atmosphere for 4h to obtain a cobalt-based catalyst 10Co / HZSM-34, in which the Co content was 10% by weight of the catalyst support.

Embodiment 3

[0044] Preparation of cobalt-based catalyst 10Co / HZSM-12: Weigh 4.93 g of commercially available cobalt nitrate hexahydrate and add it to 30 ml of deionized water, while stirring for 10 minutes to form a cobalt nitrate solution. Weigh 10 g of ZSM-12 molecular sieve with a silicon-aluminum ratio of 50, add it into the above-mentioned cobalt nitrate solution, and stir at room temperature for 6 h. Then the solvent in the above suspension was evaporated to dryness, and the evaporated solid was dried in an oven at 80° C. for 12 hours. The dried solid was heated in a muffle furnace to 550°C at a heating rate of 5°C / min, and calcined in an air atmosphere for 4h to obtain a cobalt-based catalyst 10Co / HZSM-12, in which the Co content was 10% by weight of the catalyst support.

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Abstract

The invention discloses a catalyst for Fischer-Tropsch oriented synthesis for gasoline. The catalyst comprises, by weight, from 10% to 50% of metallic cobalt, from 2% to 10% of auxiliaries and the balance molecular sieve carriers. The invention further discloses a method for preparing the catalyst for the Fischer-Tropsch oriented synthesis for the gasoline. The simple two-step impregnation method includes impregnating cobalt salt and auxiliary elements onto the untreated molecular sieve carriers. The method is simple and convenient, and cost is low. The prepared catalyst for Fischer-Tropsch synthetic reaction is high in selectivity to hydrocarbon gasoline fraction with the carbon number ranging from 5 to 12, and the content of isoparaffin is increased. Besides, a product does not contain paraffin products with high carbon numbers, so that a follow-up paraffin catalytic cracking device and the like can be omitted, problems of pipeline blockage and the like are solved, and investment cost and running cost of the devices can be effectively reduced.

Description

technical field [0001] The invention relates to a Fischer-Tropsch synthesis catalyst, in particular to a Fischer-Tropsch directional synthesis gasoline catalyst and a preparation method thereof. Background technique [0002] In recent years, with the continuous consumption of petroleum resources and the increasing demand for energy and resources worldwide, the preparation of liquid fuels and high value-added chemicals by Fischer-Tropsch synthesis (FT synthesis) has been widely recognized. . Although the research on Fischer-Tropsch synthesis has a history of more than 90 years, there are still many problems, one of which is the selective regulation of products. FT synthesis products are distributed according to the ASF (Anderson-Schulz-Flory) statistical model, the carbon number distribution of the products is very wide, and the theoretical maximum selectivity of gasoline components is only 48%. Moreover, the gasoline segment hydrocarbons directly obtained from the FT synth...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/46B01J29/76C10G2/00
Inventor 王树荣邱坤赞朱玲君方梦祥骆仲泱岑可法
Owner ZHEJIANG UNIV
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