JPH07331120A - Coating for removing nitrogen oxide and its use - Google Patents
Coating for removing nitrogen oxide and its useInfo
- Publication number
- JPH07331120A JPH07331120A JP6128536A JP12853694A JPH07331120A JP H07331120 A JPH07331120 A JP H07331120A JP 6128536 A JP6128536 A JP 6128536A JP 12853694 A JP12853694 A JP 12853694A JP H07331120 A JPH07331120 A JP H07331120A
- Authority
- JP
- Japan
- Prior art keywords
- nitrogen oxides
- removing nitrogen
- paint
- nitrogen oxide
- nitrogen
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2259/00—Type of treatment
- B01D2259/45—Gas separation or purification devices adapted for specific applications
- B01D2259/455—Gas separation or purification devices adapted for specific applications for transportable use
- B01D2259/4558—Gas separation or purification devices adapted for specific applications for transportable use for being employed as mobile cleaners for ambient air, i.e. the earth's atmosphere
Landscapes
- Paints Or Removers (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は窒素酸化物の新規な除去
方法に係り、特に、大気中の希薄な窒素酸化物を除去す
るための好適な窒素酸化物除去用塗料及びその使用方法
に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a novel method for removing nitrogen oxides, and more particularly to a suitable nitrogen oxide removing paint for removing dilute nitrogen oxides in the atmosphere and a method for using the same.
【０００２】[0002]
【従来の技術】大気中の窒素酸化物（ＮＯｘ）は自動車
排ガスが主な原因であり、特に、交差点付近の窒素酸化
物濃度は約０.１ppm と環境基準０.０６ppm をはるかに
上回っている。このような状態で、大気中に放出された
希薄な窒素酸化物の効果的な除去が望まれている。大気
中に含有される窒素酸化物を除去する方法として、例え
ば、特開平5−277340 号公報では、トンネル及び屋内駐
車場の窒素酸化物を効率良く除去できる方法が記載され
ている。この方法によれば、トンネル及び屋内駐車場の
ＮＯｘを吸着剤により吸着して濃縮後、脱着する。した
がって、この方法では脱着ガス中に濃縮されたＮＯｘの
分解などの後処理が必要となる。2. Description of the Related Art Nitrogen oxides (NOx) in the atmosphere are mainly caused by automobile exhaust gas, and in particular, the concentration of nitrogen oxides near intersections is about 0.1 ppm, which is far above the environmental standard of 0.06 ppm. . In such a state, effective removal of the dilute nitrogen oxides released into the atmosphere is desired. As a method for removing nitrogen oxides contained in the atmosphere, for example, Japanese Patent Application Laid-Open No. 5-277340 discloses a method for efficiently removing nitrogen oxides in tunnels and indoor parking lots. According to this method, NOx in the tunnel and the indoor parking lot is adsorbed by the adsorbent, concentrated, and then desorbed. Therefore, this method requires post-treatment such as decomposition of NOx concentrated in the desorption gas.
【０００３】[0003]
【発明が解決しようとする課題】本発明の目的は、上記
従来技術の大気中に放出された窒素酸化物の除去におけ
る問題点を解決し、特に還元剤等の他の薬品を使用せず
浄化する方法を提供することにある。SUMMARY OF THE INVENTION The object of the present invention is to solve the above-mentioned problems in the removal of nitrogen oxides released into the atmosphere of the prior art, and in particular, to purify without using other chemicals such as a reducing agent. To provide a way to do.
【０００４】[0004]
【課題を解決するための手段】発明者らは光触媒の効果
を応用するという考え方から、大気中に含有する窒素酸
化物を光触媒作用で除去するガスの浄化方法で、触媒の
使用形態，方法について検討し本発明に至った。即ち、
本発明は大気中に含有する希薄な窒素酸化物を光触媒作
用を持つ塗料に接触させることにより、塗料に接触した
窒素酸化物を分解あるいは酸化吸着され、除去される。SUMMARY OF THE INVENTION In view of applying the effect of a photocatalyst, the inventors have proposed a method for purifying a gas which removes nitrogen oxides contained in the air by a photocatalytic action. The present invention was studied. That is,
In the present invention, the nitrogen oxide in contact with the paint is decomposed or oxidatively adsorbed and removed by bringing the dilute nitrogen oxide contained in the air into contact with the paint having a photocatalytic action.
【０００５】本発明の方法による光触媒作用を持つ塗料
は、従来の塗料にチタニアを混合して塗布してもよい
し、従来の塗料を塗布後にチタニアを直接塗布しても良
いし、チタニアを含む塗料を調製しても良い。The coating material having a photocatalytic action according to the method of the present invention may be applied by mixing titania with a conventional coating material, by directly coating the conventional coating material with titania, or by containing titania. Paint may be prepared.
【０００６】本発明の方法による光触媒作用を持つ塗料
の使用方法は、例えば、横断歩道，中央分離帯，センタ
ライン，路肩，横断歩道橋，信号機，標識，電話ボック
ス，駐車場，外壁，塀，橋，自動車，モータバイク，自
転車，乳母車などに塗布して使用すれば良い。The method of using the paint having photocatalytic activity according to the method of the present invention is, for example, a pedestrian crossing, a median strip, a center line, a shoulder, a pedestrian bridge, a traffic light, a sign, a telephone box, a parking lot, an outer wall, a fence, a bridge. , It may be applied to automobiles, motorbikes, bicycles, baby carriages, etc. before use.
【０００７】本発明の方法による光触媒作用を起こすた
めの光源は太陽光，蛍光灯，白色灯，街灯，自動車灯，
水銀灯などがあれば良い。The light source for causing the photocatalysis by the method of the present invention is sunlight, fluorescent light, white light, street light, automobile light,
A mercury lamp etc. should be used.
【０００８】本発明の方法による光触媒作用はチタニア
を例にとると、以下のように進行すると考えられる。Photocatalysis by the method of the present invention is considered to proceed as follows, taking titania as an example.
【０００９】[0009]
【化１】 [Chemical 1]
【００１０】即ち、チタニア含有塗料は光が照射される
と、励起されてチタニアの価電子帯から伝導帯に電子が
移動する。価電子帯には正孔が生成するため強い酸化力
を有する。この酸化力，還元力によって、窒素酸化物は
ＯＨラジカルにより酸化されて硝酸となる一方窒素酸化
物が分解して、窒素と水が生成することもある。光触媒
作用を持つ塗料の表面に生成した硝酸は雨水などによっ
て洗い流され、再生される。That is, when the titania-containing coating material is irradiated with light, it is excited to move electrons from the valence band of titania to the conduction band. Since holes are generated in the valence band, it has a strong oxidizing power. Due to the oxidizing power and the reducing power, the nitrogen oxides are oxidized by the OH radicals to become nitric acid, while the nitrogen oxides may be decomposed to generate nitrogen and water. The nitric acid formed on the surface of the photocatalytic paint is washed away by rainwater and regenerated.
【００１１】[0011]
【作用】本発明によれば、光触媒作用を持つ塗料によ
り、大気中の希薄な窒素酸化物の除去を簡単に行うこと
が出来る。According to the present invention, the paint having a photocatalytic action can easily remove the dilute nitrogen oxide in the atmosphere.
【００１２】[0012]
【実施例】以下、実施例を挙げて本発明の内容をより具
体的に説明する。EXAMPLES Hereinafter, the contents of the present invention will be described more specifically with reference to examples.
【００１３】（実施例１）市販の水溶性塗料とチタニア
微粉末をよく混合して、光触媒作用を持つ塗料とした。(Example 1) A commercially available water-soluble paint and titania fine powder were mixed well to prepare a paint having a photocatalytic action.
【００１４】（実施例２）市販の油性塗料とチタニア微
粉末をよく混合して、光触媒作用を持つ塗料とした。(Example 2) A commercially available oil-based coating material and titania fine powder were thoroughly mixed to prepare a coating material having a photocatalytic action.
【００１５】（実施例３）実施例１の塗料を、石英ガラ
ス板（縦３０mm，横５０mm，厚み３mm）上に塗布した。
塗料付き石英ガラス板を高さ４００mm，横４００mm，奥
行５００mmの反応容器内に設置した。反応容器内には雰
囲気ガスとして窒素酸化物（ＮＯ）０.１ppm と空気か
らなっている。反応容器上部から、太陽光を模擬したキ
セノンランプを照射して窒素酸化物濃度変化を調べた。
ＮＯ濃度の変化はケミルミネッセンス法による窒素酸化
物分析計により分析した。その結果、反応容器内のＮＯ
濃度は０.０４ppmまで減少することがわかった。Example 3 The coating material of Example 1 was applied onto a quartz glass plate (length 30 mm, width 50 mm, thickness 3 mm).
A quartz glass plate with a paint was placed in a reaction vessel having a height of 400 mm, a width of 400 mm, and a depth of 500 mm. The atmosphere in the reaction vessel was nitrogen oxide (NO) of 0.1 ppm and air. A nitrogen oxide concentration change was examined by irradiating a xenon lamp simulating sunlight from above the reaction vessel.
The change in NO concentration was analyzed by a nitrogen oxide analyzer by the chemiluminescence method. As a result, NO in the reaction vessel
It was found that the concentration decreased to 0.04 ppm.
【００１６】（実施例４）実施例３の太陽光の変わりに
自動車灯を用いた以外は実施例３と同じである。その結
果、ＮＯ濃度は０.０５ppmまで減少した。(Embodiment 4) The same as Embodiment 3 except that an automobile lamp is used instead of the sunlight in Embodiment 3. As a result, the NO concentration was reduced to 0.05 ppm.
【００１７】（実施例５）実施例３の太陽光の変わりに
蛍光灯を用いた以外は実施例３と同じである。その結
果、ＮＯ濃度は０.０７ppmまで減少した。(Fifth Embodiment) The same as the third embodiment except that a fluorescent lamp is used instead of the sunlight in the third embodiment. As a result, the NO concentration was reduced to 0.07 ppm.
【００１８】（実施例６）実施例３の太陽光の変わりに
白色灯を用いた以外は実施例３と同じである。その結
果、ＮＯ濃度は０.０６ppmまで減少した。(Sixth Embodiment) The sixth embodiment is the same as the third embodiment except that a white light is used instead of the sunlight in the third embodiment. As a result, the NO concentration was reduced to 0.06 ppm.
【００１９】（実施例７）実施例２の塗料を用いて太陽
光を模擬したキセノンランプを用いた以外は実施例３と
同じである。その結果、ＮＯ濃度は０.０４ppmまで減少
した。Example 7 The same as Example 3 except that a xenon lamp simulating sunlight using the coating material of Example 2 was used. As a result, the NO concentration was reduced to 0.04 ppm.
【００２０】（実施例８）実施例７の太陽光の変わりに
自動車灯を用いた以外は実施例７と同じである。その結
果、ＮＯ濃度は０.０５ppmまで減少した。(Embodiment 8) The same as Embodiment 7 except that an automobile lamp is used instead of the sunlight in Embodiment 7. As a result, the NO concentration was reduced to 0.05 ppm.
【００２１】（実施例９）実施例７の太陽光の変わりに
蛍光灯を用いた以外は実施例７と同じである。その結
果、ＮＯ濃度は０.０６ppmまで減少した。(Embodiment 9) The same as Embodiment 7 except that a fluorescent lamp is used instead of the sunlight in Embodiment 7. As a result, the NO concentration was reduced to 0.06 ppm.
【００２２】（実施例１０）実施例７の太陽光の変わり
に白色灯を用いた以外は実施例７と同じである。その結
果、ＮＯ濃度は０.０５ppmまで減少した。(Example 10) Example 10 is the same as Example 7 except that a white light was used instead of the sunlight. As a result, the NO concentration was reduced to 0.05 ppm.
【００２３】[0023]
【発明の効果】本発明によれば窒素酸化物が高効率で除
去されることにより、大気中のガスが浄化される。EFFECTS OF THE INVENTION According to the present invention, nitrogen oxides are removed with high efficiency to purify atmospheric gas.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｂ０１Ｄ 53/94 Ｃ０９Ｄ 7/12 ＰＳＫ (72)発明者 宮寺 博 茨城県日立市大みか町七丁目１番１号 株 式会社日立製作所日立研究所内─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 6 Identification number Reference number within the agency FI Technical display location B01D 53/94 C09D 7/12 PSK (72) Inventor Hiroshi Miyadera 7-1, Omika-cho, Hitachi-shi, Ibaraki No. 1 Hitachi Ltd. Hitachi Research Laboratory
Claims (2)
去する作用を有することを特徴とする窒素酸化物除去用
塗料。1. A paint for removing nitrogen oxides, which has a function of removing nitrogen oxides in the air by a photocatalytic action.
光触媒作用により除去する作用を有する塗料を乗物，横
断歩道通行帯，ガードレール，信号機，標識，電話ボッ
クス，歩道橋，外壁，塀，橋，地下駐車場に塗装する窒
素酸化物除去用塗料の使用方法。2. A vehicle, a pedestrian crosswalk, a guardrail, a traffic light, a sign, a telephone box, a pedestrian bridge, an outer wall, a fence, and a bridge according to claim 1, wherein the paint has an action of removing nitrogen oxides in the atmosphere by photocatalysis. , How to use paint for removing nitrogen oxides that is applied to underground parking lots.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6128536A JPH07331120A (en) | 1994-06-10 | 1994-06-10 | Coating for removing nitrogen oxide and its use |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6128536A JPH07331120A (en) | 1994-06-10 | 1994-06-10 | Coating for removing nitrogen oxide and its use |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH07331120A true JPH07331120A (en) | 1995-12-19 |
Family
ID=14987188
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6128536A Pending JPH07331120A (en) | 1994-06-10 | 1994-06-10 | Coating for removing nitrogen oxide and its use |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07331120A (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1997023572A1 (en) * | 1995-12-22 | 1997-07-03 | Toto Ltd. | Photocatalytic process for making surface hydrophilic and composite material having photocatalytically hydrophilic surface |
| JPH09186949A (en) * | 1995-12-27 | 1997-07-15 | Toshiba Lighting & Technol Corp | Video equipment |
| EP0786283A1 (en) * | 1996-01-24 | 1997-07-30 | Mitsubishi Materials Corporation | NOX-cleaning paving block |
| JPH09228332A (en) * | 1995-12-22 | 1997-09-02 | Toto Ltd | Self-cleaning road decorative panel, and cleaning method of road decorative panel |
| JPH10277477A (en) * | 1997-04-09 | 1998-10-20 | Honda Access Corp | Treatment of outer surface of car body or parts fitted to car body |
| EP0919667A1 (en) * | 1996-08-16 | 1999-06-02 | Mitsubishi Materials Corporation | NOx REMOVING PAVEMENT STRUCTURE |
| US6090489A (en) * | 1995-12-22 | 2000-07-18 | Toto, Ltd. | Method for photocatalytically hydrophilifying surface and composite material with photocatalytically hydrophilifiable surface |
| JP2002211928A (en) * | 2000-12-30 | 2002-07-31 | Altra:Kk | Visible light-reactive titanium dioxide, method for producing the same and method for removing contaminant |
| EP1020564A4 (en) * | 1998-07-29 | 2003-06-04 | Ishihara Sangyo Kaisha | Road provided with air cleaning function and method of cleaning polluted air on road |
| CN106284016A (en) * | 2016-08-30 | 2017-01-04 | 江苏中路工程技术研究院有限公司 | A kind of function composite resin coated of cleaning of off-gas and preparation method thereof |
-
1994
- 1994-06-10 JP JP6128536A patent/JPH07331120A/en active Pending
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6090489A (en) * | 1995-12-22 | 2000-07-18 | Toto, Ltd. | Method for photocatalytically hydrophilifying surface and composite material with photocatalytically hydrophilifiable surface |
| JPH09228332A (en) * | 1995-12-22 | 1997-09-02 | Toto Ltd | Self-cleaning road decorative panel, and cleaning method of road decorative panel |
| JPH09228326A (en) * | 1995-12-22 | 1997-09-02 | Toto Ltd | Defogging road mirror and its defogging method |
| JPH09228331A (en) * | 1995-12-22 | 1997-09-02 | Toto Ltd | Self-cleaning guard fens, and cleaning method of guard fens |
| JP2002302646A (en) * | 1995-12-22 | 2002-10-18 | Toto Ltd | Sound insulating wall and method for washing sound insulating wall |
| WO1997023572A1 (en) * | 1995-12-22 | 1997-07-03 | Toto Ltd. | Photocatalytic process for making surface hydrophilic and composite material having photocatalytically hydrophilic surface |
| JPH09186949A (en) * | 1995-12-27 | 1997-07-15 | Toshiba Lighting & Technol Corp | Video equipment |
| EP0786283A1 (en) * | 1996-01-24 | 1997-07-30 | Mitsubishi Materials Corporation | NOX-cleaning paving block |
| EP0919667A4 (en) * | 1996-08-16 | 2001-02-07 | Mitsubishi Materials Corp | NOx REMOVING PAVEMENT STRUCTURE |
| EP0919667A1 (en) * | 1996-08-16 | 1999-06-02 | Mitsubishi Materials Corporation | NOx REMOVING PAVEMENT STRUCTURE |
| JPH10277477A (en) * | 1997-04-09 | 1998-10-20 | Honda Access Corp | Treatment of outer surface of car body or parts fitted to car body |
| EP1020564A4 (en) * | 1998-07-29 | 2003-06-04 | Ishihara Sangyo Kaisha | Road provided with air cleaning function and method of cleaning polluted air on road |
| US6699577B2 (en) | 1998-07-29 | 2004-03-02 | Ishihara Sangyo Kaisha, Ltd. | Air purification-functioning road and method for purifying polluted air over road |
| JP2002211928A (en) * | 2000-12-30 | 2002-07-31 | Altra:Kk | Visible light-reactive titanium dioxide, method for producing the same and method for removing contaminant |
| CN106284016A (en) * | 2016-08-30 | 2017-01-04 | 江苏中路工程技术研究院有限公司 | A kind of function composite resin coated of cleaning of off-gas and preparation method thereof |
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