A system and method for processing vocs by excimer photocoupling catalytic means
A catalytic system and excimer technology, which is applied in the field of VOCs processing system based on excimer optical coupling catalytic means, can solve the problems of high cost, secondary pollution, etc., and achieve the goal of reducing energy loss, reducing operating energy consumption, and low resistance Effect
Active Publication Date: 2021-11-16
XI AN JIAOTONG UNIV
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Problems solved by technology
[0005] In order to solve the ubiquitous high cost and secondary pollution problems in the recovery process of VOCs, the present invention provides a system and method for treating VOCs by means of excimer light-coupling catalytic means, which can achieve deep purification of industrial source VOCs and truly achieve energy saving and emission reduction the goal of
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Embodiment 2
[0036] When the method of the first embodiment is processed, the VOCS components mainly include: toluene: 600mg / m. 3 Ethyl acetate: 1300mg / m 3 , Formaldehyde 800mg / m 3 ; Catalyst is 15% Zro 2 -Tio 2 The wavelength of the excimer light is 245 nm, and the flue gas humidity is controlled at 12%, and the high voltage power supply is adjusted to 15 kV, and the detected VOCS purification efficiency is as high as 99.1%.
Embodiment 3
[0038] When VOCs are processed using the method of Example 1, wherein the VOCS component mainly includes: toluene: 950mg / m. 3 Ethyl acetate: 600mg / m 3 , Formaldehyde 1200mg / m 3 Catalyst is 10% SNO 2 -Tio 2 The wavelength of the excimer light is 222 nm, the flue gas humidity is controlled at 12%, and the high voltage power supply is adjusted to 11kV, and the detected VOCS purification efficiency is as high as 98.5%.
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Abstract
The invention discloses a system and method for treating VOCs by excimer photocoupling catalytic means. After the industrial waste gas passes through the dust collector and the Hepa filter to remove the particulate matter in the waste gas, it passes through the catalyst layer after being fully mixed with water vapor. O 2 and H 2 O is generated into O under the synergistic action of excimer light and catalyst 3 and OH radicals and other active substances, and then completely convert VOCs into CO 2 and H 2 O, finally realize the harmless treatment of industrial waste gas; the catalyst substrate of the present invention is TiO in the form of anatase 2 , the cocatalyst is ZnO, SnO 2 , ZrO 2 , g‑C 3 N 4 , g‑C 3 N 4 One or a composite of them; the present invention effectively improves the energy utilization rate, reduces the complexity of the system, and reduces the operation and maintenance costs of the VOCs recovery system. It has the characteristics of strong processing capacity and high purification rate, and does not need auxiliary heating equipment during operation, which can reduce the energy consumption loss of the system, reduce operating costs, and will not cause secondary pollution.
Description
Technical field [0001] The present invention belongs to the fields of controlling industrial emissions of volatile organic compound gas (VOCs), in particular to a catalyst based on an optical coupling means excimer systems and methods for treatment of VOCs. Background technique [0002] Volatile organic compound gas (Volatile Organic Compounds, referred to as VOCs) are more common and ubiquitous atmospheric air pollutants. Common components are the aromatic hydrocarbons, esters, ketones, ethers. Mainly from industrial processes, such as petrochemicals, pharmaceuticals, pesticides, printing, leather, footwear, paints and coatings industry, and so exhaust emissions. VOCs has strong volatility, diffusion and chemical toxicity, long-term human exposure may result in damage to internal organs and the nervous system. Further, as a precursor of the formation of ozone and PM2.5, VOCs causing photochemical pollution photochemical reaction under light irradiation, thus controlling industri...
Claims
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IPC IPC(8): B01D53/86B01D53/44B01D46/00
CPCB01D53/8687B01D2257/708B01D2255/20707B01D2258/0283B01D2259/80B01D46/62
Inventor 陈磊张早校段培高余云松张锦萍张辰吴小梅
Owner XI AN JIAOTONG UNIV