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Core-shell catalyst for removing organic sulfur as well as preparation method and application of core-shell catalyst

A core-shell catalyst, organic sulfur technology, applied in chemical instruments and methods, physical/chemical process catalysts, separation methods, etc., to achieve the effects of clean products, high specific surface area, and simple operation

Active Publication Date: 2022-03-11
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide a core-shell catalyst for removing organic sulfur and its preparation method and application, the prepared core-shell catalyst can efficiently remove Organic sulfur can effectively solve the problem of purifying organic sulfur (especially methyl mercaptan)

Method used

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  • Core-shell catalyst for removing organic sulfur as well as preparation method and application of core-shell catalyst
  • Core-shell catalyst for removing organic sulfur as well as preparation method and application of core-shell catalyst
  • Core-shell catalyst for removing organic sulfur as well as preparation method and application of core-shell catalyst

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preparation example Construction

[0026] The invention provides a method for preparing a core-shell catalyst for removing organic sulfur, comprising the following steps:

[0027] performing the first mixing of the covalent organic framework material, the first co-solvent and the first solvent, and performing electrospinning of the resulting spinning solution to obtain a fiber membrane;

[0028] The metal-organic framework material, the second co-solvent and the second solvent are mixed for the second time, and the obtained mixed solution is supported on the fiber membrane, and calcined to obtain the catalyst.

[0029] In the present invention, unless otherwise specified, the required preparation materials are commercially available products well known to those skilled in the art.

[0030] In the invention, the covalent organic framework material, the first co-solvent and the first solvent are first mixed, and the resulting spinning solution is electrostatically spun to obtain a fiber membrane. In the present ...

Embodiment 1

[0058] Stir and dissolve PAN (molecular weight 80000) and BF-COF-1 in DMF so that the mass concentration of PAN is 15%, the mass concentration of BF-COF-1 is 8%, the stirring speed is 200r / min, and the stirring temperature is 60°C , the stirring time was 3h, and the spinning solution was obtained;

[0059] Put the spinning liquid into the electrospinning equipment for electrospinning, the electrospinning take-up device adopts a detachable mesh drum take-up device, the voltage of the electrospinning process is 6kV, and the obtained spinning product is placed Dry in a vacuum drying oven for 3 hours under the condition of a vacuum of 0.1 MPa to obtain a fiber film;

[0060] PAN (molecular weight is 100000) and MIL-100 are stirred and dissolved in DMF, make the mass concentration of PAN be 10%, the mass concentration of MIL-100 is 15%, stirring speed is 400r / min, and stirring temperature is 80 ℃, stirring time For 5h, the mixed solution was obtained;

[0061] With the volume rat...

Embodiment 2

[0063] Stir and dissolve PAN (molecular weight: 120000) and COF-LZU1 in DMF so that the mass concentration of PAN is 10%, the mass concentration of COF-LZU1 is 10%, the stirring speed is 400r / min, the stirring temperature is 70°C, and the stirring time For 4h, obtain spinning solution;

[0064] Put the spinning liquid into the electrospinning equipment for electrospinning, the electrospinning take-up adopts a detachable mesh drum take-up, the voltage of the electrospinning process is 10kV, and the obtained spinning product is placed Dry in a vacuum drying oven for 3 hours under the condition of a vacuum degree of 0.05MPa to obtain a fiber film;

[0065] Stir and dissolve PAN (molecular weight is 80000) and MOF-5 in DMF so that the mass concentration of PAN is 12%, the mass concentration of MOF-5 is 11%, the stirring speed is 300r / min, the stirring temperature is 60°C, and the stirring time For 6h, the mixed solution was obtained;

[0066] With the volume ratio of the spinnin...

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Abstract

The invention provides a core-shell catalyst for removing organic sulfur as well as a preparation method and application of the core-shell catalyst, and belongs to the technical field of air pollution control. An MOFs material is used as a shell precursor, a COFs material is used as an inner core precursor, an inner core material is prepared through electrostatic spinning, then MOFs are loaded on the surface of the inner core material, and the core-shell catalyst is prepared through roasting. The COFs core can provide abundant surface loading sites, and a microporous spongy carbon structure with high mechanical strength is formed after roasting and is used as a core skeleton; a metal oxide-hydroxyl functional group coating layer formed by roasting the MOFs material plays roles in chemical adsorption and catalytic hydrolysis, and meanwhile, a hydroxyl functional group also plays a role in adsorbing organic sulfur and then transferring the organic sulfur to a metal active center. Therefore, the core-shell catalyst prepared by the preparation method disclosed by the invention has a rich pore structure, a high specific surface area, relatively strong adsorption and catalysis capabilities and an excellent organic sulfur removal effect.

Description

technical field [0001] The invention relates to the technical field of air pollution control, in particular to a core-shell catalyst for removing organic sulfur, a preparation method and application thereof. Background technique [0002] Coke oven gas, water gas, natural gas and petroleum gas are widely used in chemical production and daily life, and these gases all contain sulfides, and the types and contents of sulfides are different due to different raw materials and processes. Generally speaking, sulfide can be divided into two categories: inorganic sulfur and organic sulfur. Inorganic sulfur mainly refers to hydrogen sulfide (H 2 S), organic sulfur includes carbonyl sulfide (COS), carbon disulfide (CS 2 ), mercaptans and thioethers, etc. As the main organic sulfur impurities (carbonyl sulfide COS and methyl mercaptan CH 3 SH), will not only cause catalyst poisoning during the utilization of furnace gas, but also corrode pipelines and damage equipment. COS and CH 3 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24B01D53/48B01D53/86
CPCB01J27/24B01D53/8603B01J35/396
Inventor 宋辛孙丽娜宁平李凯
Owner KUNMING UNIV OF SCI & TECH
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