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A kind of preparation method of mof-loaded aerogel for adsorbing vocs

A technology of airgel and composite airgel, which is applied in the direction of airgel preparation, separation methods, chemical instruments and methods, etc., can solve the problems of serious secondary pollution, complex process, narrow application area, etc., and achieve the promotion of uniform growth , The preparation process is simple, the effect of good stability

Active Publication Date: 2022-03-25
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The purpose of the present invention is to provide a MOF-loaded aerogel for adsorbing VOCs and its preparation method, to solve the problems of complex process, high cost, serious secondary pollution and narrow application area when facing VOCs pollution in the prior art

Method used

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  • A kind of preparation method of mof-loaded aerogel for adsorbing vocs
  • A kind of preparation method of mof-loaded aerogel for adsorbing vocs

Examples

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Effect test

Embodiment 1

[0032] Example 1: Adsorption and separation treatment of VOCs-containing tail gas in a refinery in Liaoning Province

[0033] A MOF airgel for adsorbing VOCs and a preparation method thereof, comprising the following specific steps:

[0034] a) Preparation of nanocellulose: add microcrystalline cellulose to 200ml of concentrated sulfuric acid with a mass concentration of 50-65% according to 10wt%, hydrolyze at 60°C for 2h under continuous stirring, and then adjust the pH to 7 with deionized water , to obtain a suspension, and finally through separation, washing and drying in sequence to obtain nanocellulose;

[0035] b) Preparation of modified nanocellulose: uniformly disperse the nanocellulose in step a) in 1000ml of water at 0.01wt%, and add polyethyleneimine to the nanocellulose at 0.015wt% under slow stirring at room temperature In the dispersion solution, after high-speed stirring for 30 minutes, a graft modifier was dropped into the solution at 0.0015 wt % to perform a ...

Embodiment 2

[0041] Example 2: Adsorption and separation treatment of VOCs-containing tail gas in a chemical plant in Jiangsu Province

[0042] Composite aerogels loaded with MOF materials were prepared as described in Example 1.

[0043] Treatment object: VOCs tail gas from a petrochemical plant in Jiangsu Province. The tail gas was sampled and analyzed. After preliminary desulfurization and homogenization, the tail gas contained VOCs components including benzene, aniline, nitrobenzene, acetone, cyclohexanone, non-methane total hydrocarbons, Exhaust gas volume is 6000Nm 3 / h.

[0044] Application effect: the composite airgel loaded with MOF material according to the present invention is filled in the fan-shaped area of ​​the rotary adsorption device, and the exhaust gas at the outlet is sampled and analyzed, and the concentration of benzene, an organic characteristic pollutant, is lower than 2 mg / m 3 , the concentration of aniline is lower than 10mg / m 3 , the concentration of nitrobenz...

Embodiment 3

[0045] Example 3: Adsorption and separation treatment of VOCs-containing tail gas in a chemical plant in Shanghai

[0046] Composite aerogels loaded with MOF materials were prepared as described in Example 1.

[0047] Treatment object: A chemical plant in Shanghai contains VOCs tail gas. The tail gas is sampled and analyzed. After preliminary homogenization, the tail gas is mainly composed of methanol, ethylene glycol, and formaldehyde. The tail gas volume is 6000Nm 3 / h 1 .

[0048] Application effect: The composite airgel loaded with MOF material according to the present invention is filled in the fan-shaped area of ​​the rotary adsorption device, and the exhaust gas at the outlet is sampled and analyzed, and the methanol concentration of the organic characteristic pollutant is lower than 16mg / m 3 , the concentration of ethylene glycol is lower than 20mg / m 3 , the formaldehyde concentration is lower than 4mg / m 3 , The removal efficiency can reach 90-96%.

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Abstract

The invention relates to the field of adsorption and separation of VOCs, in particular to a MOF-loaded aerogel for adsorbing VOCs and a preparation method thereof. The invention mainly combines graphene oxide, nanocellulose and MOF materials, uses grafted modified nanocellulose as an intercalation agent, and effectively prevents the stacking of graphene oxide through the support of modified nanocellulose to maintain multi-level, With a multi-graded sheet structure, a three-dimensional graphene oxide composite aerogel loaded with UIO-66-COOH was constructed by hydrothermal reduction, one-step cross-linking, freeze-drying, and in-situ synthesis. The porosity of the MOF-loaded airgel is increased, the specific surface area is increased, a large number of functional groups are distributed, and the VOCs adsorption performance is significantly improved. The aerogel captures VOCs synergistically through a variety of adsorption methods, so as to achieve rapid and reversible absorption of a large amount of VOCs exhaust gas to deal with the increasingly severe VOCs pollution problem.

Description

technical field [0001] The invention relates to a method for preparing a MOF-loaded airgel for adsorbing VOCs. It belongs to the field of adsorption and separation of volatile organic compounds VOCs. Background technique [0002] In recent years, with the acceleration of industrialization, air pollution has become increasingly serious. Among them, volatile organic compounds (VOCs), as one of the sources of air pollution that cannot be ignored, are widely derived from petrochemical and oil refining, coal processing and conversion, coating, printing, food, etc. and other industries. VOCs waste gas, including benzene series, organic chlorides, organic ketones, amines, alcohols, petroleum hydrocarbons, etc., will not only endanger animals, plants and human health, but also cause environmental problems such as light pollution, acid rain and ozone layer holes. Therefore, it is very important to effectively treat VOCs waste gas, and airgel materials, as a kind of high-efficiency ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/26B01J20/28B01D53/02B01J20/30B01J13/00
CPCB01J20/226B01J20/20B01J20/267B01J20/28047B01D53/02B01J13/0091B01D2257/708Y02A50/20
Inventor 王炳捷白志山谭绍洹王子健刘文霞朱紫瑜
Owner EAST CHINA UNIV OF SCI & TECH