Composite adsorbent with 3DOM structure as well as preparation method and application thereof

A composite adsorption and 3DOM technology, applied in the direction of separation methods, chemical instruments and methods, silicon compounds, etc., can solve the problem of limited adsorption capacity of adsorbents

Inactive Publication Date: 2021-04-09
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Current H 2 The adsorption capacity of S a

Method used

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  • Composite adsorbent with 3DOM structure as well as preparation method and application thereof
  • Composite adsorbent with 3DOM structure as well as preparation method and application thereof
  • Composite adsorbent with 3DOM structure as well as preparation method and application thereof

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preparation example Construction

[0046] The preparation method of the 3DOM structure composite adsorbent of the present invention comprises the following steps:

[0047] (1) Preparation of colloidal crystal template

[0048] Use neutral / basic alumina chromatography column to treat styrene / methyl methacrylate for 1-5 times to de-inhibitor. After treatment, use soap-free emulsion polymerization to prepare submicron with different diameters (100-300nm) grade colloidal crystal microspheres.

[0049] (2) Preparation of precursor solution

[0050] The mass ratio of the metal oxide in the composite adsorbent to the total adsorbent is calculated as 30%-100%, and a certain amount of Fe source and Zn source are weighed and dissolved in a mixed solution of alcohol to prepare a metal salt of 0.5-2mol / L solution. Add citric acid to the above solution according to the ratio of 1-2 times the amount of metal salt substance, heat, mix and stir to obtain a metal solution chelated by citric acid. Weigh a certain amount of s...

Embodiment 1

[0058] The preparation process of the present embodiment 3DOM structure composite adsorbent comprises the following processes:

[0059] Preparation of PS colloidal crystal template microspheres:

[0060] The styrene solution was treated with a polymerization inhibitor, and the neutral alumina (specially used for chromatography) dried at 105°C for 12 hours was used as a packed column, and the styrene solution was dropped into the neutral alumina chromatography column drop by drop, and passed through the The styrene monomer that has been removed from the polymerization inhibitor is processed by the column analysis. Add 300ml of deionized water into a 500ml three-necked flask, connect the mechanical stirring device, gas communication device and condenser tube, and feed 50ml / minN 2 , while raising the temperature to 70°C and stirring continuously for 1h. Pour 6ml of styrene monomer into a three-necked flask. After 20min, add the corresponding amount of initiator dropwise (K 2 ...

Embodiment 2

[0067] Preparation of PMMA colloidal crystal template microspheres:

[0068] The methyl methacrylate solution is treated with a polymerization inhibitor, and the basic alumina (special for chromatography) that has been dried at 105°C for 12 hours is loaded into the packed column, and the methyl methacrylate solution is dropped into the chromatography column drop by drop. , to obtain the methyl methacrylate monomer having removed the polymerization inhibitor. Add 300ml of deionized water into a 500ml three-necked flask, connect the mechanical stirring device, gas communication device and condenser tube, and feed 50ml / minN 2 , while raising the temperature to 70°C and stirring continuously for 1h. Pour 22.5 mL of MMA monomer containing 0.03 wt % p-hydroxybenzoic acid into a three-necked flask. After continuous stirring for 20 min, 10 mL of 100 g / mL KPS aqueous solution was added dropwise to initiate the polymerization reaction. After 1 h, the polymerization reaction was compl...

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Abstract

The invention provides preparation and application of a ZnFe2O4-SiO2 composite adsorbent with a 3DOM structure, and belongs to the technical field of preparation of inorganic nano-porous functional materials, and the ZnFe2O4-SiO2 composite adsorbent with a 3DOM structure has a stable ordered macro-porous structure. According to the invention, a series of composite adsorbents with a stable structure and high activity are prepared by selecting a combination of a plurality of template agents and are applied to a fine removal process of hydrogen sulfide, so that the removal precision is improved, the application range is expanded, and the process cost can be effectively reduced.

Description

technical field [0001] The invention belongs to the technical field of preparation of inorganic nanoporous functional materials, in particular to a 3DOM structure composite adsorbent and its preparation method and application, mainly used for H 2 S fine removal field. Background technique [0002] Hydrogen sulfide (molecular formula H 2 S) Under standard conditions, it is a colorless gas with an irritating odor, and it is toxic, corrosive and flammable at the same time. It is a high-risk chemical with a low threshold of H 2 S can cause serious harm to human health, ecological environment and industrial production. At present, the removal methods of hydrogen sulfide include absorption method, membrane separation, cryogenic rectification and adsorption method. Among them, the adsorption method is a technology with simple process, large adsorption sulfur capacity, high precision and low cost. It is especially suitable for the process with high demand for desulfurization prec...

Claims

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Application Information

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IPC IPC(8): B01J20/10B01J20/28B01J20/30B01D53/02
CPCB01D53/02B01D2257/304B01J20/06B01J20/103B01J20/28014
Inventor 李璐段明哲何炽董瑞
Owner XI AN JIAOTONG UNIV
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