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Preparation method of hierarchical pore carbon-based catalyst for catalytic reforming of coal tar

A technology of carbon-based catalysts and catalytic upgrading, applied in the direction of physical/chemical process catalysts, catalytic cracking, chemical instruments and methods, etc., can solve the problems of unfavorable reactant diffusion active site contact, complex production process, high preparation cost, etc. Achieve the effects of low preparation cost, simple production process and increased content

Active Publication Date: 2019-03-29
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] According to the present invention, most of the existing carbon-based catalysts for catalyzing and modifying coal tar are microporous materials, which are not conducive to the diffusion of reactants in the pores of the catalyst and the contact with the active sites, and also easily lead to the inactivation of the catalyst due to the blockage of the pores; Moreover, the production process of traditional hierarchical porous carbon materials is complex and the production cost is high

Method used

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  • Preparation method of hierarchical pore carbon-based catalyst for catalytic reforming of coal tar
  • Preparation method of hierarchical pore carbon-based catalyst for catalytic reforming of coal tar
  • Preparation method of hierarchical pore carbon-based catalyst for catalytic reforming of coal tar

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] (1) The long-flame coal Wucaiwan coal in the Wucaiwan area of ​​Xinjiang was selected as the raw material. After the coal sample was crushed, ground and sieved, the sample with a particle size of less than 0.178mm was selected for the experiment.

[0037] (2) The raw coal of Wucai Bay is treated with acid elution and demineralization. Stir 60g of coal sample with 600mL of hydrochloric acid with a concentration of 6mol / L at 25°C for 12h, filter, wash and dry, then soak the coal sample with 600mL of hydrofluoric acid with a concentration of 7.6mol / L at 25°C Stir for 12 hours, filter, wash and dry to obtain demineralized Wucaiwan coal.

[0038] (3) Weigh 11g demineralized Wucaiwan coal and 0.7793g Ca(NO 3 ) 2 4H 2 O was mixed in a beaker, and deionized water was added to submerge the sample. After stirring at 25 °C for 12 h, the resulting mixture was dried at 70 °C to obtain demineralized Wucaiwan coal loaded with calcium nitrate.

[0039] (4) Put the demineralized Wuc...

Embodiment 2

[0044] (1) The long-flame Yining coal in the Yining area of ​​Xinjiang was selected as the raw material. After the coal sample was crushed, ground, and sieved, the sample with a particle size of less than 0.178 mm was selected for the experiment.

[0045] (2) Carry out acid elution mineral treatment on Yining raw coal. Stir 40 g of coal sample with 400 mL of hydrochloric acid with a concentration of 6 mol / L at 25°C for 12 hours, filter, wash, and dry, then soak the coal sample washed with hydrochloric acid and 400 mL of hydrofluoric acid with a concentration of 7.6 mol / L at 25 °C Stir at ℃ for 12 hours, filter, wash and dry to obtain demineralized Yining coal.

[0046] (3) Weigh 9g of demineralized Yining coal and 0.4757g of Ca(CH 3 COO) 2 ·H 2 O was mixed in a beaker, and deionized water was added to submerge the sample. After stirring at 25 °C for 12 h, the resulting mixture was dried at 70 °C to obtain demineralized Yining coal loaded with calcium acetate.

[0047] (4) ...

Embodiment 3

[0053] (1) The long-flame coal Wucaiwan coal in the Wucaiwan area of ​​Xinjiang was selected as the raw material. After the coal sample was crushed, ground and sieved, the sample with a particle size of less than 0.178mm was selected for the experiment.

[0054] (2) The raw coal of Wucai Bay is treated with acid elution and demineralization. Stir 60g of coal sample with 600mL of hydrochloric acid with a concentration of 6mol / L at 25°C for 12h, filter, wash and dry, then soak the coal sample with 600mL of hydrofluoric acid with a concentration of 7.6mol / L at 25°C Stir for 12 hours, filter, wash and dry to obtain demineralized Wucaiwan coal.

[0055] (3) Weigh 12g of demineralized Wucaiwan coal and 0.2223g of Ca(OH) 2 Mix in a beaker, add deionized water to immerse the sample, stir at 25°C for 12h, and dry the resulting mixture at 70°C to obtain demineralized Wucaiwan coal loaded with calcium hydroxide.

[0056] (4) The demineralized Wucaiwan coal loaded with calcium hydroxide...

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Abstract

A preparation method of a hierarchical pore carbon-based catalyst for catalytic reforming of coal tar belongs to the technical field of preparation of catalysts for catalytic reforming of coal tar, and can solve a problem that the large diffusion resistance of existing microporous carbon-based catalysts having a small pore size is not conducive to the proceeding of a catalytic reaction. The methodcomprises the following steps: carrying out steam activation on low metamorphic coal under the catalysis of a calcium-containing mineral matter to obtain semi-coke with a hierarchical pore structure,and using the semi-coke with the hierarchical pore structure as a carrier to support an active metal in order to prepare the carbon-based catalyst with a hierarchical pore structure. The catalyst hasdeveloped microporous and mesoporous structures, so the diffusion of heavy components in the tar in the pores of the catalyst and the contact of the heavy components with active sites are benefited,and the catalyst has a good catalytic effect in the catalytic reforming of coal tar, and has a broad application prospect.

Description

technical field [0001] The invention belongs to the technical field of preparation of catalytically modified coal tar catalysts, and in particular relates to a preparation method of a hierarchical porous carbon-based catalyst used for catalytically modified coal tar. Background technique [0002] Coal pyrolysis is the basic stage of coal thermochemical transformation, and the tar produced during coal pyrolysis is a viscous mixture of hydrocarbons. The light components in coal tar are important chemical raw materials, many of which cannot or cannot be economically obtained from the petroleum industry. However, the heavy components in the coal tar produced by the coal chemical industry are as high as more than 50%. Due to the high boiling point of the heavy components, the separation is difficult, and the degree of processing and utilization of the heavy components is low. This not only causes a waste of resources, but also easily lead to environmental pollution. [0003] Ca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/78B01J23/28B01J35/10C10G11/02
CPCC10G11/02B01J23/28B01J23/78C10G2400/30B01J35/695
Inventor 鲍卫仁吕鹏李凡闫伦靖高美琪周亚杰
Owner TAIYUAN UNIV OF TECH
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