CN1101257C - Air purifying process with microwave and photo catalysis - Google Patents
Air purifying process with microwave and photo catalysis Download PDFInfo
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- CN1101257C CN1101257C CN00119367A CN00119367A CN1101257C CN 1101257 C CN1101257 C CN 1101257C CN 00119367 A CN00119367 A CN 00119367A CN 00119367 A CN00119367 A CN 00119367A CN 1101257 C CN1101257 C CN 1101257C
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- microwave
- photo catalysis
- technology
- tio
- photocatalysis
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Abstract
The present invention discloses a novel air purifying technology with high efficiency, in particular to a microwave technology and a photocatalysis technology for purifying air. The present invention causes the microwave technology and the photocatalysis technology to be effectively combined to improve the efficiency of decomposing organic waste gas by photocatalysis, and thus, the purpose of purifying air is achieved. The microwave technology and the photocatalysis technology for purifying air are characterized in that a microwave field is guided into an air purifier which can be used for carrying out photocatalysis reaction under the condition of illumination of sunlight or ultraviolet rays to realize the purpose of the present invention.
Description
The present invention relates to the application of photocatalysis oxidation technique on air cleaning is handled, specifically microwave and photocatalysis coupled technology.
Photocatalysis oxidation technique is with its room temperature deep reaction and can directly utilize sunlight to come special performances such as activating catalyst as light source and become 21st century ideal environment pollution control technology, and has formed new research focus gradually.Light-catalysed outstanding properties is the oxidation Decomposition to organic pollution, but on commercial Application, because the lower quantum efficiency (～4%) of conventional titanium dioxide semiconductor photocatalysis makes its further industrial applications be subjected to restriction.In addition, the water in gas-photocatalysis in solid phase product has greatly reduced the speed of light-catalyzed reaction in the absorption (photochemical catalyst has strongly hydrophilic) of catalyst surface.
Prove according to the relevant new data of looking into: up to now, microwave technology is applied in photocatalytic degradation waste gas or the research work of disposing of sewage does not appear in the newspapers as yet both at home and abroad.
The objective of the invention is to provide a kind of can improve the photocatalysis quantum efficiency and make this technology can be the air purifying process that people accepted economically, promptly under the synergy of microwave field and sunshine or ultraviolet illumination, decompose organic exhaust gas, thereby reach the air purifying process with microwave and photo catalysis of the purpose that purifies air.
The object of the present invention is achieved like this: a kind ofly microwave field is incorporated under sunshine or ultraviolet illumination in the air purifying process with microwave and photo catalysis of implementing light-catalyzed reaction, it is characterized in that in photo catalysis reactor, using the ultraviolet illumination of sunshine or wavelength 187～400nm, simultaneously the microwave of frequency of utilization 2.54GHz～40GHz in photo catalysis reactor.Photochemical catalyst in the described photo catalysis reactor is super-strong acidified titanium dioxide optical catalyst (SO
4 2-/ TiO
2); Titanium dioxide optical catalyst (TiO
2); Titanium dioxide-silica composite photo-catalyst (TiO
2-SiO
2); Titanium dioxide-alundum (Al composite photo-catalyst (TiO
2-Al
2O
3).As long as contaminated air is incorporated in the microwave and photo catalysis reactor of the present invention, what give off is having purified air after up to standard during work.
The present invention is implementing under the effect of original photochemical catalyst in illumination on the basis of air pollution purified treatment because be, microwave field is incorporated in this reaction, because microwave has effective removal photocatalyst surface adsorbed water and significantly improves the special efficacy of electron transition on the titanium dioxide valence band, so the efficient of utilizing the present invention to purify air than the PHOTOCATALYTIC AIR-PURIFYING of routine obviously improves, particularly the ability of decomposing organic matter is stronger.So the present invention can reach the purpose of drafting that purifies air.
Concrete technology of the present invention is provided by following embodiment and block diagram thereof.
Fig. 1 is the block diagram of the technology of the present invention.
Fig. 2 is that (ordinate is %) with the situation of change figure in reaction time (abscissa, hour) for the conversion ratio of ethene among the embodiment 1.
In photo catalysis reactor, use sunshine or ultraviolet illumination among Fig. 1, and introduce microwave.After contaminated air entered this reactor, what give off had been cleaned air passes promptly.
Embodiment 1
Super-strong acidified titanium dioxide optical catalyst (the SO of sol-gel process preparation is selected in experiment for use
4 2-/ TiO
2) and conventional titanium dioxide optical catalyst (TiO
2), simulated exhaust is selected ethylene gas (0.0500% ± 0.0002% standard gas, carrier gas employing standard purifies air) for use, and light source is 1000W collimation, focusing Xe lamp, microwave source input power 1mW, frequency 2.54GHz.Reactant is continuously by reactor, and U.S. HP6850 type chromatograph is used in the product on-line analysis.
Experimental result shows that microwave and light-catalysed synergy have improved the organic efficient of photochemical catalytic oxidation, make at TiO
2And SO
4 2-/ TiO
2The conversion ratio of ethene brings up to 27% and 62% from 20% and 41% respectively on the photochemical catalyst.
Fig. 2 showed ethene conversion ratio (ordinate, %) with the situation of change in reaction time (abscissa, hour), SO
4 2-/ TiO
2Represent super-strong acidified titanium dioxide optical catalyst, TiO
2Represent conventional titanium dioxide optical catalyst, UV represents only conversion of ethylene situation of change under ultraviolet irradiation, and UV+MW then is illustrated in conversion of ethylene situation of change under ultraviolet irradiation and the microwave cooperating effect.No matter be not difficult to find out from Fig. 2, be TiO
2Or SO
4 2-/ TiO
2Photochemical catalyst, ultraviolet irradiation is following always than the conversion of ethylene height under the independent ultraviolet irradiation with the microwave cooperating effect.
Claims (2)
1. one kind is incorporated into the microwave and photo catalysis air purification method that sunshine or ultraviolet illumination are implemented light-catalyzed reaction down with microwave field, it is characterized in that in photo catalysis reactor, using the ultraviolet illumination of sunshine or wavelength 187～400nm, simultaneously the microwave of frequency of utilization 2.54GHz～40GHz in photo catalysis reactor.
2. microwave and photo catalysis air purification method according to claim 1 is characterized in that the photochemical catalyst in the described photo catalysis reactor is: super-strong acidified titanium dioxide optical catalyst SO
4 2-/ TiO
2Titanium dioxide optical catalyst TiO
2Titania-silica composite photo-catalyst TiO
2-SiO
2Titanium dioxide-alundum (Al photochemical catalyst TiO
2-Al
2O
3
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN00119367A CN1101257C (en) | 2000-06-27 | 2000-06-27 | Air purifying process with microwave and photo catalysis |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN00119367A CN1101257C (en) | 2000-06-27 | 2000-06-27 | Air purifying process with microwave and photo catalysis |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1279124A CN1279124A (en) | 2001-01-10 |
| CN1101257C true CN1101257C (en) | 2003-02-12 |
Family
ID=4587624
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN00119367A Expired - Fee Related CN1101257C (en) | 2000-06-27 | 2000-06-27 | Air purifying process with microwave and photo catalysis |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1101257C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104289087A (en) * | 2014-04-22 | 2015-01-21 | 江苏大明科技有限公司 | Recovery system for tail gas generated by triethyl phosphate production |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06262035A (en) * | 1993-03-11 | 1994-09-20 | Mitsui Eng & Shipbuild Co Ltd | Method and apparatus for decomposing harmful gas |
| US5439595A (en) * | 1993-08-25 | 1995-08-08 | Downey, Jr.; Wayne F. | Water decontamination method using peroxide photolysis ionizer |
| US5451302A (en) * | 1994-05-03 | 1995-09-19 | Cha; Chang Y. | Process for microwave catalysis of chemical reactions using waveguide liquid films |
| CN1208670A (en) * | 1998-07-08 | 1999-02-24 | 福州大学化肥催化剂国家工程研究中心 | Solid super strong acid photocatalyst |
| CN2331416Y (en) * | 1998-03-30 | 1999-08-04 | 武汉纺织工学院 | Photocatalysis reactor |
| CN2333944Y (en) * | 1998-07-10 | 1999-08-18 | 福州大学化肥催化剂国家工程研究中心 | Ozone photocatalysis air purifier |
-
2000
- 2000-06-27 CN CN00119367A patent/CN1101257C/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06262035A (en) * | 1993-03-11 | 1994-09-20 | Mitsui Eng & Shipbuild Co Ltd | Method and apparatus for decomposing harmful gas |
| US5439595A (en) * | 1993-08-25 | 1995-08-08 | Downey, Jr.; Wayne F. | Water decontamination method using peroxide photolysis ionizer |
| US5451302A (en) * | 1994-05-03 | 1995-09-19 | Cha; Chang Y. | Process for microwave catalysis of chemical reactions using waveguide liquid films |
| CN2331416Y (en) * | 1998-03-30 | 1999-08-04 | 武汉纺织工学院 | Photocatalysis reactor |
| CN1208670A (en) * | 1998-07-08 | 1999-02-24 | 福州大学化肥催化剂国家工程研究中心 | Solid super strong acid photocatalyst |
| CN2333944Y (en) * | 1998-07-10 | 1999-08-18 | 福州大学化肥催化剂国家工程研究中心 | Ozone photocatalysis air purifier |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1279124A (en) | 2001-01-10 |
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