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VOCs absorbent and application thereof

An absorbent and ionic liquid technology, which is applied in the field of mixed organic waste gas treatment and recovery, can solve the problems of high price, unfavorable gas absorption, high viscosity of ionic liquid, etc., and achieve the effect of simple operation, continuous operation and low energy consumption

Active Publication Date: 2018-11-13
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After research, it was found that VOCs such as benzene, propylene, propane, and xylene have high solubility in ionic liquids. However, due to the high viscosity of ionic liquids, it is not conducive to gas absorption. Therefore, in the actual absorption process, the treatment of VOCs cannot achieve the desired effect.
Moreover, ionic liquids are expensive compared to other VOCs absorbents, and are not convenient for large-scale use

Method used

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  • VOCs absorbent and application thereof
  • VOCs absorbent and application thereof
  • VOCs absorbent and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] The composition and mass fraction of an ionic liquid-in-water (IL / W) VOCs absorbent are:

[0048]

[0049] The above-mentioned VOCs absorbent is prepared to absorb the original waste gas, and the specific steps are as follows:

[0050] At 5g[DDMIM][NTf 2 ], add 8g of Tween-80, then add 5g of n-butanol, shake well, add 82g of water to 3ml·min under stirring -1 The speed of adding in above-mentioned solution, obtains microemulsion, prepares three parts of microemulsion according to above-mentioned steps for subsequent use (prepare three parts of microemulsion, each part is 100g, this example has used three absorption towers, so each absorption tower absorbent is For 100g, the data analysis is the absorption effect of 200g, because the actual absorption is that two towers participate in the absorption).

[0051] The present invention adopts multi-absorption operation, that is, three absorption devices are installed, and the actual working process is two absorption dev...

Embodiment 2

[0054] The composition and mass fraction of an ionic liquid-in-water (IL / W) VOCs absorbent are:

[0055]

[0056] The above-mentioned VOCs absorbent is prepared to absorb the original waste gas, and the specific steps are as follows:

[0057] At 5g[DDMIM][NTf 2 ], add 8g of Tween-80, then add 5g of n-butanol, shake well, add 82g of water to 3ml·min under stirring -1 The mixed organic waste gas containing aromatics, halogenated hydrocarbons and other VOCs is concentrated into the microemulsion, the microemulsion is maintained at a constant temperature of 303.15K, and the organic waste gas is discharged in the microemulsion after 4 seconds. The trachea is discharged, and its outlet is the purified gas. The initial absorption rate of the absorbent for VOCs can reach more than 78%; the absorbed absorbent is distilled under reduced pressure, and the temperature and pressure can be controlled to achieve different components. separation. This example employs a single-stage abso...

Embodiment 3

[0060] The composition and mass fraction of an ionic liquid-in-water (IL / W) VOCs absorbent are:

[0061]

[0062]

[0063] The above-mentioned VOCs absorbent is prepared to absorb the original waste gas, and the specific steps are as follows:

[0064] In 6g [BMIM] [PF 6 ], add 10g of Tween-80, then add 6g of n-butanol, shake well, add 78g of water to 3ml·min under stirring -1 Add to the above solution at a speed of 100 ℃ to obtain a microemulsion, and prepare three microemulsions according to the above steps for subsequent use.

[0065] The present invention adopts multi-absorption operation, that is, three absorption devices are installed, and the actual working process is two absorption devices, and the remaining absorption devices perform desorption processes, such as figure 1 As shown in the figure, the mixed gas is concentrated in the mixed gas tank V1, and the gas compressor C1 is used to adjust the optimal intake concentration and intake speed, and then it is co...

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Abstract

The invention provides a VOCs absorbent and application thereof. The absorbent uses ionic liquid as a polarity phase, a small amount of ion liquid is evenly dispersed in a large amount of water or biodiesel to obtain a microemulsion under the effects of a non-ionic surface active agent and a cosurfactant. The microemulsion has very high VOCs solubleness, and the problems of inorganized VOCs discharge treatment and VOCs recycle of sewage treatment plants are solved.

Description

technical field [0001] The invention relates to the treatment and recovery of VOCs fugitive emissions from sewage treatment plants, in particular to a treatment and recovery method of mixed organic waste gas containing aromatics, halogenated hydrocarbons and other VOCs. Background technique [0002] The definition of VOCs (volatile organic compounds) has many forms. For example, the American ASTMD3960-98 standard defines VOCs as any organic compounds that can participate in atmospheric photochemical reactions; the definition in air pollution control engineering is that VOCs are a general term for a class of organic compounds , at room temperature their evaporation rate is large and volatile. VOCs include non-methane hydrocarbons (alkanes, alkenes, alkynes, aromatic hydrocarbons, etc.), oxygen-containing organics (aldehydes, ketones, alcohols, ethers, etc.), chlorine-containing organics, nitrogen-containing organics, sulfur-containing organics, etc. O 3 ) and an important p...

Claims

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Application Information

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IPC IPC(8): B01D53/18
CPCB01D53/18B01D2252/30B01D2257/708B01D2258/02Y02A50/20
Inventor 张文林孙腾飞闫佳伟霍宇李功伟和佳明王雨昕李春利
Owner HEBEI UNIV OF TECH
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