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Device and method for removing VOCs (volatile organic chemicals) by low-temperature plasma and electrostatic spinning-photocatalysis technology

A low-temperature plasma and electrospinning technology, which is applied in the field of devices for removing VOCs by ion synergistic electrospinning-photocatalysis technology, can solve the problems of easy poisoning and deactivation of catalysts, unstable ultraviolet light source, and high energy consumption

Inactive Publication Date: 2015-08-05
FUJIAN ZIJIN ENVIRONMENT ENG TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, low-temperature plasma technology has its unique advantages, such as: high processing efficiency, short reaction process, suitable for most polluted gases, suitable for processing low-concentration and large-volume gases, etc. Disadvantages such as incomplete degradation and difficulty in controlling ozone emissions
Photocatalytic technology is widely used due to its advantages of low energy consumption, simple operation, and complete catalytic reaction, but there are also some defects when used alone, such as: unstable ultraviolet light source, difficult to deal with high-concentration and large-volume gas, and easy poisoning of catalysts Inactivation, etc.

Method used

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  • Device and method for removing VOCs (volatile organic chemicals) by low-temperature plasma and electrostatic spinning-photocatalysis technology
  • Device and method for removing VOCs (volatile organic chemicals) by low-temperature plasma and electrostatic spinning-photocatalysis technology
  • Device and method for removing VOCs (volatile organic chemicals) by low-temperature plasma and electrostatic spinning-photocatalysis technology

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Experimental program
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Effect test

Embodiment 1

[0031] According to the above CeO 2 / TiO 2 The preparation method of nanofiber photocatalytic material, in the Erlenmeyer flask with stopper of 20ml, add the butyl titanate of 5ml (Ti(OC 4 h 9 ) 4), then slowly add acetic acid dropwise, the volume ratio of butyl titanate and acetic acid is 1.3, and magnetically stir for 30min, the solution is yellow and transparent, which is used as the precursor solution. Then configure a 1.0mol / L polystyrene solution, the solvent is a mixed solvent of tetrahydrofuran (THF) and N,N-dimethylformamide (DMF) (DMF / THF=4 / 6 (wt)), and then add the above Precursor solution and cerium nitrate (Ce(NO 3 ) 3 ·6H 2 O) and 0.01437g, 0.02889g, 0.08843g and 0.1505g of cerium nitrate, respectively, and uniformly stirred for 3 hours under magnetic force until the solution was bright, light yellow, transparent and clear, and used as the spinning solution.

[0032] Inhale the spinning solution into a 5ml glass syringe with a stainless steel needle, conne...

Embodiment 2

[0036] According to the above CeO 2 / TiO 2 The preparation method of nanofiber photocatalytic material, in the 20ml Erlenmeyer flask with stopper, add 5ml of butyl titanate (Ti(OC 4 h 9 ) 4 ), then slowly add acetic acid dropwise, the volume ratio of butyl titanate and acetic acid is 1.3, and magnetically stir for 30min, the solution is yellow and transparent, which is used as the precursor solution. Then configure a polystyrene solution with a certain concentration, the solvent is a mixed solvent of tetrahydrofuran (THF) and N,N-dimethylformamide (DMF) (DMF / THF=4 / 6 (wt)), and then add the above precursor solution and cerium nitrate (Ce(NO 3 ) 3 ·6H 2 O), 0.08843g of cerium nitrate, stirred evenly by magnetic force for 3h, until the solution was bright light yellow, transparent and clear, and used as spinning solution.

[0037] Inhale the spinning solution into a 5ml glass syringe with a stainless steel needle, connect the needle tip to the positive pole of the power su...

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Abstract

The invention discloses a method for removing VOCs (volatile organic chemicals) by low-temperature plasma and electrostatic spinning-photocatalysis technology. The method includes the steps: firstly, preparing nano-fiber photocatalysis materials: manufacturing precursor solution by butyl titanate and acetic acid; preparing polystyrene solution and mixing THF (tetrahydrofuran) and DMF (dimethyl formamide) by 4 / 6 to form solvents; secondly, adding the precursor solution and cerous nitrate to form spinning solution; sucking the spinning solution into an injector, adjusting the distance between a needle tip and a receiving device and adjusting injection electric field intensity and advance speed to obtain CeO2-TiO2 / PS composite fibers; annealing and roasting the composite fibers to obtain CeO2 / TiO2 nano-fiber photocatalysis materials; removing the VOCs by the low-temperature plasma-photocatalysis technology. The invention further discloses a corresponding device. The method has the advantages of simplicity in operation, high treatment efficiency, short reaction process, applicability to most polluted gas, suitability for treating low-concentration large-airflow gas and the like.

Description

technical field [0001] The invention belongs to the technical field of removing volatile organic compounds (VOCs) in waste gas, and in particular relates to a device and method for removing VOCs by low-temperature plasma cooperative electrospinning-photocatalysis technology. Background technique [0002] With the development of science and technology and the improvement of people's living standards, environmental pollution problems have appeared to varying degrees all over the world, especially in developing countries. At present, my country's annual emission of VOCs is about 18 million tons. The "Twelfth Five-Year Plan for the Prevention and Control of Air Pollution in Key Areas" even proposes that during the "Twelfth Five-Year Plan" period, it will target petrochemical, organic chemical, synthetic materials, chemical raw drug manufacturing, In key industries such as plastic product manufacturing and equipment manufacturing and coating, improve the VOCs pollution prevention ...

Claims

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Application Information

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IPC IPC(8): B01D53/86B01D53/44B01J23/10
CPCY02A50/20
Inventor 王洪明
Owner FUJIAN ZIJIN ENVIRONMENT ENG TECH
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