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Molecular sieve composite material used for VOCs rotating wheel adsorption, and preparation method thereof

A composite material and molecular sieve technology, which is applied in the field of molecular sieve composite materials for VOCs rotor adsorption and its preparation, can solve problems such as a large number of organic solvents, and achieve the effects of simple and feasible method, excellent performance and safe preparation process.

Active Publication Date: 2019-01-11
芜湖格丰环保科技研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] Surface grafting is to use the reactive hydroxyl groups rich in the surface of clay sheets, and use silane coupling agents to graft and modify the surface. This method can significantly enhance the hydrophobicity of the clay surface and has strong thermal stability. , but its disadvantage is that silane grafting often requires the use of a large amount of organic solvents

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] A method for preparing a molecular sieve composite material for VOCs rotor adsorption, comprising the following steps:

[0038] 1) Mixed impregnation: weigh 30kg ZSM-5 molecular sieve (SiO 2 / Al 2 o 3 =360, specific surface area 350m 2 / g, particle size 200-300 mesh), 50kg deionized water, 2kg ammonium fluorosilicate, pre-mixed in the mixer for 0.5h, and then weighed 70kg bentonite (particle size 200-300 mesh), 10kg silica sol (SiO 2 Content 30%, pH=10.2), 50kg of deionized water is poured into a mixer and mixed for 3 hours;

[0039] 2) Drying: put the slurry cloth obtained in step 1) on a tray, and put it into a hot air drying line for drying at 105-115° C. for 4 hours.

[0040] 3) Roasting: After drying, the material is put into a roller-bed roasting kiln for roasting, roasted at 600-620°C for 2 hours, and cooled to normal temperature to obtain a molecular sieve composite material for VOCs rotor adsorption.

[0041] The molecular sieve composite material used fo...

Embodiment 2

[0043] A method for preparing a molecular sieve composite material for VOCs rotor adsorption, comprising the following steps:

[0044] 1) Mixed impregnation: weigh 35kg ZSM-5 molecular sieve (SiO 2 / Al 2 o 3 =300, specific surface area>342m 2 / g, particle size 200-300 mesh), 50kg deionized water, 2kg ammonium fluorosilicate, pre-mixed in the mixer for 0.5h, and then weighed 65kg bentonite (particle size 200-300 mesh), 10kg silica sol (SiO 2 Content 30%, pH=10.2), 50kg of deionized water is poured into a mixer and mixed for 3 hours;

[0045] 2) Drying: put the slurry cloth obtained in step 1) on a tray, and put it into a hot air drying line for drying at 105-115° C. for 4 hours.

[0046] 3) Roasting: After drying, the material is put into a roller-bed roasting kiln for roasting, roasted at 620-640°C for 2 hours, and cooled to normal temperature to obtain a molecular sieve composite material for VOCs rotor adsorption.

[0047] The molecular sieve composite material used fo...

Embodiment 3

[0049] A method for preparing a molecular sieve composite material for VOCs rotor adsorption, comprising the following steps:

[0050] 1) Mixed impregnation: weigh 35kg ZSM-5 molecular sieve (silicon-aluminum ratio 360, specific surface area 350m 2 / g, particle size 200-300 mesh), 75kg deionized water, 2.5kg ammonium fluorosilicate, pre-mixed in the mixer for 0.5h, and then weighed 65kg bentonite (particle size 200-300 mesh), 10kg silicon Sol (SiO 2 Content 30%, pH=10.2), 60kg of deionized water is poured into a mixer and mixed for 3 hours;

[0051] 2) Drying: put the slurry cloth obtained in step 1) on a tray, and put it into a hot air drying line for drying at 105-115° C. for 4 hours.

[0052] 3) Roasting: After drying, the material is put into a roller-bed roasting kiln for roasting, roasted at 600-620°C for 3 hours, and cooled to normal temperature to obtain a molecular sieve composite material for VOCs rotor adsorption.

[0053] The molecular sieve composite material u...

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Abstract

The invention provides a molecular sieve composite material used for VOCs rotating wheel adsorption, and a preparation method thereof. The molecular sieve composite material used for VOCs rotating wheel adsorption is prepared from, by weight, 20 to 35 parts of high silicon ZSM-5 molecular sieve, 65 to 80 parts of bentonite, 2 to 6 parts of ammonium fluosilicate, 10 to 15 parts of silica sol, and 50 to 150 parts of deionized water. According to the preparation method, cheap porous natural clay-bentonite is used for replacing expensive artificially synthesized molecular sieve at a large ratio, and chemical modification method is adopted further so as to reduce material cost and satisfy absorption performance requirements. Compared with the prior art, the advantages are that: no organic solvent is adopted, the preparation method is safe, cost is low, product performance is excellent, inlet gas xylene concentration ranges from 550 to 750mg / m3, gas inlet air speed ranges from 20000 to 120000h<-1>, absorption capacity reaches 40 to 60mg / g, and the performance is better than that of commercially available Y-type and common ZSM-5 molecular sieve.

Description

technical field [0001] The invention belongs to the field of atmospheric VOCs treatment, and in particular relates to a molecular sieve composite material for VOCs runner adsorption and a preparation method thereof. Background technique [0002] Excessive emissions of volatile organic compounds (VOCs) will have a serious impact on the natural environment and human health. Pollution is common in petrochemical, pharmaceutical, automotive, rubber, paint and coating industries. At present, around VOCs pollution control, according to the site and pollution characteristics and whether it is reused or not, there are a variety of treatment technologies. Common technologies include: leaching absorption, adsorption and desorption, physical condensation, combustion and catalytic combustion, photocatalytic oxidation, plasma Oxidation and other processes, in practical applications, single or multiple technologies are used for pollution control depending on the situation. [0003] Adsorp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/06B01J20/18B01J20/30
CPCB01D53/06B01D2257/708B01J20/18Y02A50/20
Inventor 章文贵郭进进奉向东吴黄河龚梅玲
Owner 芜湖格丰环保科技研究院有限公司
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