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Adsorbing material for removing carbonyl sulfide by carbon material loaded ionic liquid and application of adsorbing material

An ionic liquid and adsorption material technology, which is applied in the field of adsorption and separation of carbonyl sulfide gas, can solve the problems of low gas-liquid mass transfer efficiency, cumbersome preparation process, and difficult industrialization.

Active Publication Date: 2021-07-06
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Invention patent CN201310396855.6 discloses "a method for removing hydrogen sulfide and carbonyl sulfide in gas", which removes hydrogen sulfide and carbonyl sulfide by adding heterocyclic amines The desulfurization effect is good, but due to the liquid environment, the viscosity is high, the gas-liquid mass transfer efficiency is low, and the cost is high, it is difficult to be used in industrialization
[0007] Invention patent CN109589949 A discloses "Synthesis and Application of an Ionic Liquid Loaded Porous Material". This method removes hydrogen sulfide from natural gas by loading a bifunctional ionic liquid Functionalized ionic liquids have expanded a new method of modifying porous materials, but the actual operation of this method is too complicated and not suitable for large-scale industrial processes
[0008] Invention patent CN103170312 A discloses "a carbon nanotube-based CO 2 Sorbent and its preparation method", the method is by first carbon nanotubes in O 2 and N 2 surface oxidation treatment in a mixed gas, and then disperse it in a mixed solution of organic amine and toluene for modification, although this method can effectively capture CO 2 , but because the preparation process of this method is cumbersome and the cost is high, it is difficult to be used in industrialization
[0009] Invention patent CN104815695 A discloses "a method for preparing diisobutylene by catalyzing a carbon nanotube-supported ionic liquid catalyst". Catalytic preparation of diisobutene, although the catalytic material obtained by this method has high yield and selectivity, and expands the new method of carbon nanotube modification, but the actual operation of this method is too complicated and not suitable for large-scale industrialization process

Method used

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  • Adsorbing material for removing carbonyl sulfide by carbon material loaded ionic liquid and application of adsorbing material
  • Adsorbing material for removing carbonyl sulfide by carbon material loaded ionic liquid and application of adsorbing material
  • Adsorbing material for removing carbonyl sulfide by carbon material loaded ionic liquid and application of adsorbing material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Example 1: A carbonyl sulfide material supported by an ionic liquid, the preparation steps of which are as follows:

[0033] (1) Synthesis of 1-ethyl-3-methylimidazolium tetrafluoroborate ionic liquid

[0034] The invention adopts a two-step method to synthesize the 1-ethyl-3-methylimidazolium tetrafluoroborate ionic liquid, and the first step is to synthesize the 1-ethyl-3-methylimidazolium bromide ionic liquid. First take by weighing N-methylimidazole and bromoethane according to molar ratio 1:1.1, the N-methylimidazole that takes is placed in reactor, in N 2 Under protection, the water bath was heated to 40°C, and then the weighed ethyl bromide was slowly added to the reactor drop by drop at a rate of 1 drop / (2~3s) with a constant pressure funnel, and the reaction was stirred and refluxed for 8 hours, and the reactant gradually became into a white solid; after the reaction is completed, it is cooled to room temperature, and the solid product is washed and purified w...

Embodiment 2

[0038] Embodiment 2: A carbonyl sulfide material loaded with ionic liquid, its preparation steps are as follows:

[0039] (1) Synthesis of 1-ethyl-3-methylimidazolium tetrafluoroborate ionic liquid

[0040] The synthesis steps of 1-ethyl-3-methylimidazolium tetrafluoroborate ionic liquid were repeated in Example 1.

[0041] (2) Activated carbon supported 1-ethyl-3-methylimidazolium tetrafluoroborate ionic liquid

[0042] First, the granular activated carbon (blue carbon, particle size 0.5-1.0 cm) was thoroughly washed with water until the pH was neutral, and then dried for later use. 1.0 g of 1-ethyl-3-methylimidazolium tetrafluoroborate ionic liquid was added to 20 mL of deionized water, after ultrasonic mixing for 6 min, 20 g of treated activated carbon was added, and then at room temperature, Stir and impregnate for 10 h, and finally place the mixture in a vacuum oven, dry at 70 °C for 6 h, and place the obtained adsorbent in N 2 Store in an atmosphere desiccator.

Embodiment 3

[0043] Embodiment 3: A carbonyl sulfide removal material supported by an activated carbon-supported ionic liquid, the preparation steps of which are as follows:

[0044] (1) Synthesis of 1-ethyl-3-methylimidazolium tetrafluoroborate ionic liquid

[0045] The synthesis steps of 1-ethyl-3-methylimidazolium tetrafluoroborate ionic liquid were repeated in Example 1.

[0046] (2) Activated carbon supported 1-ethyl-3-methylimidazolium tetrafluoroborate ionic liquid

[0047] First, the granular activated carbon (blue carbon, particle size 0.5-1.0 cm) was thoroughly washed with water until the pH was neutral, and then dried for later use. 2.0 g of 1-ethyl-3-methylimidazolium tetrafluoroborate ionic liquid was added to 20 mL of deionized water, after ultrasonic mixing for 8 min, 20 g of treated activated carbon was added, and then at room temperature, Stir and impregnate for 12 h, and finally place the mixture in a vacuum oven, dry at 70 °C for 8 h, and place the obtained adsorbent i...

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Abstract

The invention discloses an adsorbing material for removing carbonyl sulfide by carbon material loaded ionic liquid and application of adsorbing material. A preparation method of the adsorbing material comprises the following steps: adding ionic liquid into a diluting solvent, carrying out ultrasonic mixing for 4-8 minutes, then adding a carbon material at room temperature, carrying out stirring impregnation for 8-12 hours, finally putting the obtained mixture into a vacuum drying oven, conducting drying at 60-80 DEG C for 4-8 hours, and storing the obtained adsorbing material product in an N2 atmosphere dryer, wherein the ionic liquid is 1-ethyl-3-methylimidazolium tetrafluoroborate ionic liquid, the carbon material is activated carbon or multi-walled carbon nanotubes, and the activated carbon is semi-coke. When the adsorbing material is used for adsorption treatment of carbonyl sulfide in mixed gas, the adsorbing material has the advantages of being high in carbonyl sulfide removal rate, good in cyclicity and the like, the preparation method of the adsorbing material is simple, and the adsorbing material has potential industrial application value.

Description

technical field [0001] The invention relates to the technical field of adsorption and separation of carbonyl sulfide gas, in particular to an adsorption material for removing carbonyl sulfide by a carbon material-loaded ionic liquid and an application thereof. Background technique [0002] Activated carbon is prepared by pyrolysis and activation of carbon-containing raw materials such as wood, coal and petroleum coke, usually in powder or granular form, with developed pore structure, large specific surface area and rich surface chemical groups , a porous amorphous carbon material with strong specific adsorption capacity. Modification of activated carbon by chemical or physical means can reduce the ash content of activated carbon and improve the adsorption capacity. Therefore, modified activated carbon materials are widely used in sewage treatment, air pollution prevention and other fields. [0003] Carbon nanotubes are one-dimensional carbon materials with a special hexagon...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/22B01J20/28B01J20/32C10K1/00C10K1/32
CPCB01J20/20B01J20/22B01J20/205B01J20/28016B01J20/28061B01J20/3246C10K1/004C10K1/32Y02P20/54
Inventor 王建国谢亮张乐乐孔祥宇李岩峰
Owner ZHEJIANG UNIV OF TECH
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