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Liquid porous material for extracting methane as well as preparation method and application thereof

A porous material and liquid technology, applied in the field of landfill gas purification and concentration, can solve problems such as fire, environmental pollution, and danger, and achieve the effect of less energy consumption and simple method

Inactive Publication Date: 2017-05-31
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Methane is a greenhouse gas and a combustible gas. If it is not treated and discharged, it will not only pollute the environment and cause a serious greenhouse effect, but also be prone to fire and explosion accidents, which is a major safety hazard
At present, there are few studies on the extraction of methane from landfill gas. The patent CN 103159580 needs to compress the landfill gas to a relatively high pressure. The compression process will cause danger, and the extraction experiment needs to be heated to a high temperature.

Method used

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  • Liquid porous material for extracting methane as well as preparation method and application thereof
  • Liquid porous material for extracting methane as well as preparation method and application thereof
  • Liquid porous material for extracting methane as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A method for preparing a liquid porous material for extracting methane, comprising the following steps:

[0027] (1) Under a nitrogen atmosphere, react the mixture I prepared by 1.5g of 2,3-O-isopropylidene-D-threol, 4g of sodium hydride, and 500mL of 1,4-dioxane at 60°C 1.5h, then add the mixed solution II prepared by tetraethylene glycol di-p-toluenesulfonate 4g and 1,4-dioxane 250mL, the mass ratio of mixed solution I to mixed solution II is 1.99:1, in Reaction at 90°C for 23 hours to obtain the product S1, the product S1 was extracted with chloroform and water, the chloroform layer (lower layer) was dried and dehydrated with sodium sulfate, and then concentrated in vacuo;

[0028] (2) Add 5 g of the concentrated product S1 to 5 mL of 2mol / L hydrochloric acid and 17 mL of methanol and react at room temperature for 18 hours to obtain the product S2. The product S2 is extracted with saturated sodium bicarbonate solution and chloroform, and the chloroform layer (lower l...

Embodiment 2

[0045] A method for preparing a liquid porous material for extracting methane, comprising the following steps:

[0046] (1) Under a nitrogen atmosphere, react 1.5g of 2,3-O-isopropylidene-D-threol with 4g of sodium hydride and 490mL of 1,4-dioxane at 70°C for 1h, then add four The mixed solution II prepared by 4 g of ethylene glycol di-p-toluenesulfonate and 260 mL of 1,4-dioxane, the mass ratio of the mixed solution I to the mixed solution II is 1.77, reacted at 100 ° C for 22 hours to obtain the product S1, the product S1 was extracted with chloroform and water, the chloroform layer (lower layer) was dried and dehydrated with sodium sulfate, concentrated in vacuo, and purified by column chromatography;

[0047] (2) Add 5 g of the purified product S1 to 10 mL of 3 mol / L hydrochloric acid and 17 mL of methanol to react at room temperature for 20 hours to obtain the product S2. The product S2 is extracted with saturated sodium bicarbonate solution and chloroform, and the chloro...

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Abstract

The invention discloses a liquid porous material for extracting methane as well as a preparation method and application thereof. The liquid porous material is prepared by taking 2,3-O-isopropylidene-D-threoatol, 1,4-dioxane, tetraethylene glycol di-p-toluenesulfonate, hydrochloric acid, triethylamine, dichloromethane, methylsulfonyl chloride, sodium azide, 15-crown-5, palladium on carbon, ethanol and the like as raw materials and performing a series of reaction, and is used for extracting the methane in rubbish landfill gas. The liquid porous material disclosed by the invention has the advantages of being high in methane recovery rate, high in reliability and renewable in recycling.

Description

technical field [0001] The invention relates to a preparation method and application of a liquid porous material for extracting methane, and belongs to the field of purification and concentration of landfill gas. Background technique [0002] With the development of social economy and the acceleration of urbanization, the generation of urban solid waste in my country has increased rapidly. While the amount of garbage generated has increased significantly, the content of biodegradable organic matter in garbage has also increased significantly. A large amount of landfill gas is generated during the treatment of organic domestic garbage. 50-60% of the landfill gas is methane, and the rest is carbon dioxide, Nitrogen, oxygen and other trace gases. Methane is a greenhouse gas and a combustible gas. If the emission is not treated, it will not only pollute the environment and cause a serious greenhouse effect, but also be prone to fire and explosion accidents, which is a major saf...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C7/11C07C9/04
CPCC07C7/11C07C9/04Y02E50/30
Inventor 孙鑫孙丽娜宁平李凯
Owner KUNMING UNIV OF SCI & TECH
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