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Catalyst using SBA-16 molecular sieve as carrier, and preparation method and application thereof

A catalyst and molecular sieve technology, applied in the field of inorganic catalyst preparation, can solve the problems of wide pore size distribution and difficult synthesis, and achieve the effects of high cobalt loading, improved product selectivity, and reduced methane selectivity

Active Publication Date: 2011-06-01
SOUTH CENTRAL UNIVERSITY FOR NATIONALITIES +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In the prior art, the conventional oxide support often used in Fischer-Tropsch synthesis has stacked pores and wide pore size distribution, making it difficult to selectively synthesize products of a certain fraction

Method used

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  • Catalyst using SBA-16 molecular sieve as carrier, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] At 35℃, mix 12g of triblock polymer surfactant P123 (Aldrich, EO 20 PO 70 EO 20 , M A =5800) and 61g polymer surfactant F-127(C 3 H 6 O·C 2 H 4 O) X Dissolve in 3400ml of 2mol / L hydrochloric acid, stir until completely dissolved, then add 283ml of ethyl orthosilicate (TEOS), stir for 24h, then transfer to the polytetrafluoroethylene reactor, crystallize at 70℃ for 24h, filter, After washing, drying at 120°C for 5 hours, and finally calcining at 550°C for 5 hours, a cage-shaped molecular sieve SBA-16 (1) with a pore size of 6 nm was obtained.

[0023] Weigh 10.0g of SBA-16(1) molecular sieve dried at 150℃, and then weigh 13.6g of Co(NO 3 ) 2 ·6H 2 O add water to prepare 6ml solution, immerse the solution on SBA-16(1), dry it, dry it in an oven at 120℃ for 12h, and finally put it in a muffle furnace and roast it at 400℃ for 5h to obtain 20% Co / SBA-16(1) catalyst, marked as Cat.1, the content of cobalt in the catalyst is 20wt%.

Embodiment 2

[0025] At 35℃, mix 12g of triblock polymer surfactant P123 (Aldrich, EO 20 PO 70 EO 20 , M A =5800) and 61g polymer surfactant F-127(C 3 H 6 O·C 2 H 4 O) X Dissolve in 3400ml of 2mol / L hydrochloric acid, stir until completely dissolved, then add 283ml of ethyl orthosilicate (TEOS), stir for 24h, then transfer to the polytetrafluoroethylene reactor, crystallize at 90℃ for 24h, filter, After washing, drying at 120°C for 5 hours, and finally calcining at 550°C for 5 hours, a cage-shaped molecular sieve SBA-16 (2) with a pore size of 10 nm was obtained.

[0026] Weigh 10.0g of SBA-16(2) molecular sieve dried at 150℃, and then weigh 18.8g of Co(NO 3 ) 2 ·6H 2 O add water to prepare 8ml solution, immerse the solution on SBA-16(2), dry it, dry it in an oven at 120℃ for 12h, and finally put it in a muffle furnace and roast it at 400℃ for 5h to get 25% Co / SBA-16(2) catalyst, marked as Cat. 2, the content of cobalt in the catalyst is 25wt%.

Embodiment 3

[0028] At 35℃, mix 12g of triblock polymer surfactant P123 (Aldrich, EO 20 PO 70 EO 20 , M A =5800) and 61g polymer surfactant F-127(C 3 H 6 O·C 2 H 4 O) X Dissolve in 3400ml of 2mol / L hydrochloric acid, stir until completely dissolved, then add 283ml of ethyl orthosilicate (TEOS), stir for 24h, then transfer to the polytetrafluoroethylene reactor, crystallize at 120℃ for 24h, filter, After washing, drying at 120°C for 5 hours, and finally calcining at 550°C for 5 hours, a cage-shaped molecular sieve SBA-16 (3) with a pore size of 12 nm was obtained.

[0029] Weigh 10.0g of SBA-16(3) molecular sieve dried at 150℃, and then weigh 16.5g of Co(NO 3 ) 2 ·6H 2 O add water to prepare 9ml solution, immerse the solution on SBA-16(3), dry it, dry it in an oven at 120℃ for 12h to make an intermediate, and weigh 16.5g Co(NO 3 ) 2 ·6H 2 Prepare 9ml of O with water, immerse the solution on the intermediate, dry it, dry it in an oven at 120℃ for 12h, and finally put it in a muffle furnace and ro...

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Abstract

The invention discloses a catalyst using an SBA-16 molecular sieve as a carrier, and a preparation method and application thereof. The catalyst is prepared by using a mesoporous SBA-16 molecular sieve with cage structures as the carrier, and is a cobalt-based catalyst for Fischer-Tropsch synthesis. The catalyst contains 10-45 wt% of element cobalt and 0-20.5 wt% of assistant metallic element. The catalyst disclosed by the invention has a three-dimensional porous channel system, has the advantages of high specific area, high cobalt loading capacity, high reaction activity, high hydrothermal stability, high selectivity for heavy hydrocarbons, and the like, and is hopeful to be used for Fischer-Tropsch synthesis reaction.

Description

Technical field [0001] The invention relates to the technical field of preparation of inorganic catalysts, in particular to a catalyst with SBA-16 molecular sieve as a carrier, and a preparation method and application thereof. The catalyst is suitable for catalyzing Fischer-Tropsch synthesis reactions. Background technique [0002] Fischer-Tropsch synthesis is a reaction in which a mixture of carbon monoxide and hydrogen (usually referred to as synthesis gas) is converted into hydrocarbon compounds under the action of a catalyst. The Fischer-Tropsch synthesis reaction usually selects Group VIII metals as catalysts. In addition to Fe, it can be directly used Oxide Fe 3 O 4 In addition to catalyzing the Fischer-Tropsch synthesis, other metals such as Co, Ru, Pt, etc. are generally supported in the form of oxides on an inert carrier to form a catalyst. Such catalysts can significantly increase the conversion of carbon monoxide when applied to the Fischer-Tropsch synthesis reaction. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/03C10G2/00
Inventor 李金林刘家举张煜华赵燕熹胡春玲胡红军
Owner SOUTH CENTRAL UNIVERSITY FOR NATIONALITIES
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