Semi-coke supported tar steam reforming catalyst and its preparation method and application

A steam reforming, supported technology, applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc. Weak force and low utilization of metal active components

Active Publication Date: 2022-03-25
NINGXIA UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method uses equal volume impregnation to load the active components, the active components are difficult to uniformly disperse in the pore structure of the carrier, and the carrier-metal interaction force is weak, and the utilization rate of the metal active components is low in the catalytic process

Method used

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  • Semi-coke supported tar steam reforming catalyst and its preparation method and application
  • Semi-coke supported tar steam reforming catalyst and its preparation method and application
  • Semi-coke supported tar steam reforming catalyst and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] Prepare 100 mL of aqueous hydrogen peroxide solution with a mass fraction of 10%.

[0055] Preparation of oxidized low-rank coal:

[0056] Immerse 20g of low-rank coal in the above hydrogen peroxide solution with a mass fraction of 10%, mix well, stir at 40°C for 4h, filter and wash the filter residue with water until neutral, and dry at 70°C until the water content is 5%; rank coal;

[0057] Preparation of metal salt solution: weigh 5g of nickel acetate tetrahydrate, dissolve it in 100mL of deionized water; add ammonia water with a mass concentration of 25%, and adjust the pH of the salt solution to 11;

[0058] Ion exchange: Take 10 g of the oxidized low-rank coal and add it to the nickel salt solution prepared above, stir at 30°C for 24 hours, filter, wash the filter residue with water until neutral, and dry at 70°C until the water content is 3%;

[0059] Catalyst molding: pyrolyze the above-mentioned dried filter residue under an inert atmosphere to stabilize the ...

Embodiment 2

[0068] Prepare 100 mL of aqueous hydrogen peroxide solution with a mass fraction of 20%.

[0069] Preparation of oxidized low-rank coal:

[0070] Immerse 20g of low-rank coal in the above hydrogen peroxide solution with a mass fraction of 20%, mix well, stir at 30°C for 6h, filter and wash the filter residue with water until neutral, and dry at 80°C until the water content is 3%; rank coal;

[0071] Preparation of metal salt solution:

[0072] Weigh 3.9g of anhydrous nickel chloride, dissolve it in 100mL of deionized water; add ammonia water with a mass concentration of 25%, and adjust the pH of the salt solution to 10;

[0073] Ion exchange: Take 20g of the oxidized low-rank coal and add it to the above-mentioned prepared nickel salt solution, stir at 25°C for 32h, filter, wash the filter residue with water until neutral, and dry at 80°C until the water content is 3%;

[0074] Catalyst molding: pyrolyze the above-mentioned dried filter residue under an inert atmosphere to ...

Embodiment 3

[0083] Prepare 100 mL of aqueous hydrogen peroxide solution with a mass fraction of 30%.

[0084] Preparation of oxidized low-rank coal:

[0085] Immerse 10 g of low-rank coal in the above hydrogen peroxide solution with a mass fraction of 30%, mix well, stir at 50°C for 2 hours, filter and wash the filter residue with water until neutral, and dry at 60°C until the water content is 4%, to obtain low-oxidation rank coal;

[0086] Preparation of metal salt solution: weigh 2.7g of nickel nitrate hexahydrate, dissolve it in 100mL of deionized water; add sodium hydroxide solution with a mass concentration of 40%, and adjust the pH of the salt solution to 12;

[0087] Ion exchange: Take 7g of the oxidized low-rank coal and add it to the nickel salt solution prepared above, stir at 35°C for 16 hours, filter, wash the filter residue with water until neutral, and dry at 60°C until the water content is 4%;

[0088] Catalyst molding: pyrolyze the above-mentioned dried filter residue un...

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Abstract

The invention discloses a semi-coke-loaded tar steam reforming catalyst and its preparation method and application. The semi-coke-loaded tar steam reforming catalyst uses low-rank coal pretreated by an oxidant as a catalyst carrier precursor, and Ni is metal active components. The invention uses cheap low-rank coal as the precursor of the catalyst carrier, which enriches the acidic sites on the surface of the catalyst, strengthens the interaction between the carrier and the metal, improves the atom utilization efficiency, and further improves the catalyst activity. The production cost is greatly reduced, and it can be used to catalyze steam reforming of biomass or low-order coal gasification tar, and has a high carbon conversion rate.

Description

technical field [0001] The invention belongs to the technical field of energy and chemical engineering, and in particular relates to a semi-coke loaded tar steam reforming catalyst and a preparation and application method thereof. Background technique [0002] Gasification is one of the main technologies for the clean and efficient conversion of coal. It is widely used in the fields of chemical synthesis, industrial gas, metallurgical reducing gas production and coal-based polygeneration. It is its core and key. [0003] Tar is an inevitable by-product of low-temperature gasification of low-rank coal, and the gasification gas often contains 5-75g / Nm 3 Varying pyrolysis tar, this part of tar will block pipelines, corrode downstream equipment, deactivate catalysts in subsequent processes, and cause many obstacles to the clean utilization of low-rank coal. [0004] Among many tar removal technologies, catalytic reforming not only has high tar removal efficiency, relatively mil...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/78B01J35/10C01B3/32
CPCB01J23/78B01J35/1019B01J35/10C01B3/32C01B2203/0233C01B2203/1058
Inventor 白永辉王焦飞宋旭东苏暐光马萌于广锁
Owner NINGXIA UNIVERSITY
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