JP2001070419A - Air purifying method - Google Patents
Air purifying methodInfo
- Publication number
- JP2001070419A JP2001070419A JP25498899A JP25498899A JP2001070419A JP 2001070419 A JP2001070419 A JP 2001070419A JP 25498899 A JP25498899 A JP 25498899A JP 25498899 A JP25498899 A JP 25498899A JP 2001070419 A JP2001070419 A JP 2001070419A
- Authority
- JP
- Japan
- Prior art keywords
- photocatalyst
- basic gas
- filter
- air purification
- purification method
- 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.)
- Granted
Links
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- 238000004887 air purification Methods 0.000 claims description 30
- 239000002253 acid Substances 0.000 claims description 6
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- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
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- 229940079593 drug Drugs 0.000 description 2
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- NWUYHJFMYQTDRP-UHFFFAOYSA-N 1,2-bis(ethenyl)benzene;1-ethenyl-2-ethylbenzene;styrene Chemical compound C=CC1=CC=CC=C1.CCC1=CC=CC=C1C=C.C=CC1=CC=CC=C1C=C NWUYHJFMYQTDRP-UHFFFAOYSA-N 0.000 description 1
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- KMHSUNDEGHRBNV-UHFFFAOYSA-N 2,4-dichloropyrimidine-5-carbonitrile Chemical class ClC1=NC=C(C#N)C(Cl)=N1 KMHSUNDEGHRBNV-UHFFFAOYSA-N 0.000 description 1
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
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- AGBXYHCHUYARJY-UHFFFAOYSA-N 2-phenylethenesulfonic acid Chemical compound OS(=O)(=O)C=CC1=CC=CC=C1 AGBXYHCHUYARJY-UHFFFAOYSA-N 0.000 description 1
- GUUULVAMQJLDSY-UHFFFAOYSA-N 4,5-dihydro-1,2-thiazole Chemical compound C1CC=NS1 GUUULVAMQJLDSY-UHFFFAOYSA-N 0.000 description 1
- 241000238876 Acari Species 0.000 description 1
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- 229920002101 Chitin Polymers 0.000 description 1
- 229920001661 Chitosan Polymers 0.000 description 1
- GHXZTYHSJHQHIJ-UHFFFAOYSA-N Chlorhexidine Chemical compound C=1C=C(Cl)C=CC=1NC(N)=NC(N)=NCCCCCCN=C(N)N=C(N)NC1=CC=C(Cl)C=C1 GHXZTYHSJHQHIJ-UHFFFAOYSA-N 0.000 description 1
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 1
- QMMFVYPAHWMCMS-UHFFFAOYSA-N Dimethyl sulfide Chemical compound CSC QMMFVYPAHWMCMS-UHFFFAOYSA-N 0.000 description 1
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- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 description 1
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Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、家庭、事業所、車
室内などの各種建造物内等において、悪臭などの有害物
質を除去するために用いられる空気浄化方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air purification method used for removing harmful substances such as bad smells in various buildings such as homes, offices, and passenger compartments.
【０００２】[0002]
【従来の技術】食品臭、たばこ臭、ペット臭、便所臭な
どの悪臭の成分は、多種多様であり、代表的なものとし
て、アンモニア、アミン類、インドール、スカトールな
どの窒素化合物、硫化水素、メチルメルカプタン、硫化
メチル、二硫化メチル、二硫化ジメチルなどの硫黄化合
物、ホルムアルデヒド、アセトアルデヒドなどのアルデ
ヒド類、アセトンなどのケトン類、メタノール、エタノ
ールなどのアルコール類がある。2. Description of the Related Art The components of malodor such as food odor, tobacco odor, pet odor, and toilet odor are various, and typical ones are ammonia, amines, nitrogen compounds such as indole and skatole, hydrogen sulfide, There are sulfur compounds such as methyl mercaptan, methyl sulfide, methyl disulfide and dimethyl disulfide, aldehydes such as formaldehyde and acetaldehyde, ketones such as acetone, and alcohols such as methanol and ethanol.
【０００３】従来、このような悪臭を脱臭する方法とし
て、悪臭物質と薬剤とを化学反応させる方法、芳香剤で
悪臭物質をマスキングする方法、活性炭、ゼオライトな
どの吸着剤にて悪臭物質を吸着する方法、または、これ
らの方法を組み合わせて行う方法があった。このような
各種の脱臭方法が使用されているが、薬剤及び芳香剤
は、共に悪臭物質と反応した後での再生はほとんど不可
能である。また、吸着剤の場合も、吸着容量が飽和する
と脱臭性能は著しく低下する。従って、どのような方法
においても、新しいものと定期的に交換しなければなら
ない。Heretofore, as a method of deodorizing such malodor, a method of chemically reacting a malodorous substance with a medicine, a method of masking a malodorous substance with an aromatic agent, and adsorption of a malodorous substance by an adsorbent such as activated carbon and zeolite have been proposed. There has been a method or a method of combining these methods. Although various such deodorizing methods have been used, it is almost impossible to regenerate both the drug and the fragrance after reacting with the malodorous substance. Also, in the case of an adsorbent, when the adsorption capacity is saturated, the deodorizing performance is significantly reduced. Therefore, any replacement must be periodically replaced with a new one.
【０００４】そこで、光触媒とランプとを用いて、脱臭
機能を果たすようにした空気浄化方法が開発されてい
る。光触媒は光エネルギを化学エネルギに変える物質で
あり、この空気浄化方法では、ランプから紫外線を光触
媒に照射してその光エネルギーにて光触媒を活性化さ
せ、酸化反応を促進させて悪臭物質を無臭物質に変換す
る。紫外線照射によって光触媒が励起されると、光触媒
から電子が飛び出し表面に吸着した酸素を攻撃してＯ2 -
を生成し、また、正孔が空気中の水分を攻撃して、ＯＨ
ラジカルを生成し、これらの活性種により悪臭物質の酸
化反応が促進され、種々の悪臭物質が、具体的には水蒸
気、二酸化炭素などの無臭物質まで最終的に分解され
る。[0004] Therefore, an air purifying method using a photocatalyst and a lamp to perform a deodorizing function has been developed. A photocatalyst is a substance that converts light energy into chemical energy. In this air purification method, ultraviolet light is emitted from a lamp to the photocatalyst to activate the photocatalyst with the light energy, thereby promoting an oxidation reaction and converting odorous substances into odorless substances. Convert to When the photocatalyst is excited by the ultraviolet radiation, attacking the oxygen electrons from the photocatalyst is adsorbed on the surface popping O 2 -
And the holes attack the moisture in the air to form OH
Radicals are generated, and the oxidation reaction of malodorous substances is accelerated by these active species, and various malodorous substances are finally decomposed into odorless substances such as water vapor and carbon dioxide.
【０００５】このような光触媒を利用した空気浄化方法
は非常に優れたものであるが、たばこ臭などの複合臭気
を対象とする場合には、純ガスに比較して脱臭性が低下
する問題があり、改良が求められていた。[0005] Such an air purification method using a photocatalyst is very excellent, but when a complex odor such as a tobacco odor is targeted, there is a problem that the deodorizing property is lower than that of a pure gas. There was a need for improvement.
【０００６】[0006]
【発明が解決しようとする課題】本発明の課題は、脱臭
効率が高く、特に複合臭気に有効な光触媒による空気浄
化方法の提供である。SUMMARY OF THE INVENTION An object of the present invention is to provide a method for purifying air by means of a photocatalyst which has high deodorizing efficiency and is effective especially for complex odors.
【０００７】[0007]
【課題を解決するための手段】本発明者は、上記課題を
解決するため鋭意検討を重ねた結果、本発明に到達した
ものである。Means for Solving the Problems The present inventors have made intensive studies to solve the above-mentioned problems, and as a result, have reached the present invention.
【０００８】（１）光触媒を用いた空気浄化方法におい
て、光触媒による処理前に塩基性ガス除去フィルターを
設けることを特徴とする空気浄化方法。(1) An air purification method using a photocatalyst, wherein a basic gas removal filter is provided before the treatment with the photocatalyst.
【０００９】（２）上記の発明（１）において、該塩基
性ガス除去フィルターが酸性ガス吸着剤を含有すること
を特徴とする空気浄化方法。(2) The air purification method according to the invention (1), wherein the basic gas removal filter contains an acid gas adsorbent.
【００１０】（３）上記の発明（１）において、該塩基
性ガス除去フィルターが酸性ガス吸着剤を含有しないこ
とを特徴とする空気浄化方法。(3) The air purification method according to the above invention (1), wherein the basic gas removal filter does not contain an acidic gas adsorbent.
【００１１】（４）上記の発明（１）または（３）にお
いて、該塩基性ガス除去フィルターの酢酸除去率が３０
％以下であることを特徴とする空気浄化方法。(4) In the above invention (1) or (3), the basic gas removal filter has an acetic acid removal rate of 30.
% Or less.
【００１２】[0012]
【発明の実施の形態】本発明は、光触媒を用いた空気浄
化方法において、脱臭効率が高く、特に複合臭気の脱臭
に優れた空気浄化方法を提供する。DETAILED DESCRIPTION OF THE INVENTION The present invention provides an air purification method using a photocatalyst, which has a high deodorizing efficiency and is particularly excellent in deodorizing complex odors.
【００１３】本発明に係わる光触媒とは、０．５〜５ｅ
Ｖ、好ましくは１〜４ｅＶの禁止帯幅を有する、光触媒
反応をもたらす光反応性半導体であり、励起光を照射す
ることによって、抗菌、抗ウイルス、防黴、脱臭、防汚
などの機能を発現する素材である。特にその抗菌性は優
れたものであり、細菌の増殖を抑えるだけでなく、細菌
が死滅する際に発生する毒素を分解して無害化し、ま
た、細菌の死骸をも分解するため、その効果は従来の無
機系抗菌剤などのように短期間で低下することがなく永
続すると言われている。The photocatalyst according to the present invention is 0.5 to 5 e
V, preferably a photoreactive semiconductor that has a bandgap of 1 to 4 eV and provides a photocatalytic reaction, and exhibits functions such as antibacterial, antiviral, antifungal, deodorizing, and antifouling by irradiating with excitation light. It is a material to do. In particular, its antibacterial properties are excellent, and it not only suppresses the growth of bacteria, but also decomposes toxins generated when bacteria die and detoxifies them, and also decomposes dead bacteria. It is said that it does not deteriorate in a short period of time unlike conventional inorganic antibacterial agents and is permanent.
【００１４】本発明に係わる光触媒としては、酸化亜
鉛、酸化タングステン、酸化チタン、及び酸化セリウム
等の金属酸化物粒子が挙げられる。中でも、酸化チタン
はその構造安定性、光反応性有害物除去能、更には取扱
い上の安全性等から生活空間において使用するには最も
適しており、また、酸化亜鉛は励起光が照射されない環
境下でも抗菌性を有しており、この両者は本発明の光触
媒として有利に用いられる。The photocatalyst according to the present invention includes metal oxide particles such as zinc oxide, tungsten oxide, titanium oxide, and cerium oxide. Among them, titanium oxide is most suitable for use in living space because of its structural stability, ability to remove photoreactive harmful substances, and safety in handling, and zinc oxide is an environment that is not irradiated with excitation light. It also has antimicrobial properties even below, and both are advantageously used as the photocatalyst of the present invention.
【００１５】本発明に係わる酸化チタンは、白色顔料と
して用いられる汎用の二酸化チタン（但し、耐候処理が
全くまたは部分的にしかされていないもの）の他、メタ
チタン酸、オルトチタン酸、含水酸化チタン、水和酸化
チタン、水酸化チタンおよび過酸化チタン等のチタン酸
化物や水酸化物などが挙げられる。The titanium oxide according to the present invention is not limited to general-purpose titanium dioxide used as a white pigment (provided that the weathering treatment is completely or only partially performed), but also metatitanic acid, orthotitanic acid and hydrous titanium oxide. And titanium oxides and hydroxides such as hydrated titanium oxide, titanium hydroxide and titanium peroxide.
【００１６】中でも一次粒径が数十ｎｍ程度で、アナタ
ーゼ結晶構造を有する微粒子酸化チタンは比較的安価で
性能の優れた光触媒である。但し、本発明に係わる酸化
チタンはアナターゼ結晶構造に限定されるものではな
く、光触媒能を有するものであれば、ルチルやブルカイ
トなどの結晶構造を有するものや非晶性酸化チタンであ
っても良い。酸化チタンの形状として、立方体状、球
状、真球状、薄片状またはナノクラスターなどが挙げら
れる。上記のチタン化合物以外にも、チタニウムアルコ
キシドやチタニウムキレートなどの有機チタネートを用
いても良く、均一性が高く、且つ透明性の高い光触媒膜
を形成することが可能である。Among them, fine particle titanium oxide having a primary particle size of about several tens nm and having an anatase crystal structure is a relatively inexpensive photocatalyst having excellent performance. However, the titanium oxide according to the present invention is not limited to an anatase crystal structure, and may have a crystal structure such as rutile or brookite or an amorphous titanium oxide as long as it has a photocatalytic ability. . Examples of the shape of the titanium oxide include a cube, a sphere, a true sphere, a flake, and a nanocluster. An organic titanate such as a titanium alkoxide or a titanium chelate may be used in addition to the above titanium compound, and a highly uniform and highly transparent photocatalytic film can be formed.
【００１７】これらの酸化チタンの表面および結晶構造
の内部に、Ｐｔ、Ａｕ、Ａｇ、Ｃｕ、Ｐｄ、Ｎｉ、Ｃ
ｏ、Ｆｅ、Ｚｎ、Ｍｏ、Ｉｒ、Ｂｉ、Ｗ、Ｏｓ、Ｒｈ、
Ｎｂ、Ｓｎ、Ｖ、ＣｒおよびＲｕ等の種々の金属、その
イオンまたはその酸化物などの化合物を担持あるいはド
ーピングさせたりして複合しても良い。Pt, Au, Ag, Cu, Pd, Ni, C
o, Fe, Zn, Mo, Ir, Bi, W, Os, Rh,
Compounds such as various metals such as Nb, Sn, V, Cr, and Ru, and their ions or oxides thereof may be supported or doped for compounding.
【００１８】本発明に係わる光触媒は基材に担持するこ
とが好ましく、光触媒を基材に担持する方法としては、
基材の原料に練り混み等によって担持する方法、塗工や
印刷、含浸などによって担持する方法、湿式抄造によっ
て担持する方法、２枚以上の基材の間に封入する方法な
どが挙げられる。光触媒を基材に担持するに当たって
は、所望により、後述する脱臭剤や抗菌剤などを併用担
持しても良い。The photocatalyst according to the present invention is preferably supported on a substrate, and the method for supporting the photocatalyst on a substrate is as follows.
A method of supporting the raw material of the base material by mixing and mixing, a method of supporting the raw material by coating, printing, impregnation, and the like, a method of supporting the raw material by wet papermaking, a method of enclosing the raw material between two or more substrates, and the like are included. In supporting the photocatalyst on the base material, a deodorant or an antibacterial agent, which will be described later, may be supported in combination, if desired.
【００１９】本発明に係わる光触媒を担持する基材は特
に限定されるものではなく、各種の紙、不織布、樹脂フ
ィルム、金属箔などのシート、セラミクス、カーボン、
ガラス、金属、木材などを用いることができる。本発明
においては、例えば紙、不織布、布帛などの繊維状シー
トは多孔質構造であり、光触媒と臭気物質との接触の機
会が多いため好ましい。The substrate supporting the photocatalyst according to the present invention is not particularly limited, and various sheets of paper, nonwoven fabric, resin film, metal foil, etc., ceramics, carbon,
Glass, metal, wood, or the like can be used. In the present invention, for example, a fibrous sheet such as paper, nonwoven fabric, or fabric has a porous structure, and is preferred because there are many opportunities for contact between the photocatalyst and the odorant.
【００２０】これらの基材の形状は、シート状、平板
状、波板状、プリーツ状、フィルター状、フォーム状、
ハニカム状、フェルト状、ネット状などが挙げられる
が、特にこれらに限定されるものではない。The shapes of these substrates are sheet, flat, corrugated, pleated, filter, foam,
Examples thereof include a honeycomb shape, a felt shape, and a net shape, but are not particularly limited thereto.
【００２１】本発明の空気浄化方法においては、光触媒
に励起光を照射することが好ましく、ブラックライト、
捕虫灯、健康ランプ、殺菌灯、高圧水銀ランプ、メタル
ハライドランプおよび高圧ナトリウムランプなど専用の
光源を設けて照射することが好ましいが、それ以外に
も、蛍光灯などの室内照明光の照射、および屋外や窓際
での日光の照射などを利用することができる。光触媒励
起光の照射は連続または間欠のいずれを採ることも可能
である。In the air purification method of the present invention, it is preferable to irradiate the photocatalyst with excitation light.
It is preferable to provide a dedicated light source such as a trapping light, a health lamp, a germicidal lamp, a high-pressure mercury lamp, a metal halide lamp, and a high-pressure sodium lamp for irradiation. And sunlight irradiation at the window. Irradiation with photocatalytic excitation light can be continuous or intermittent.
【００２２】本発明の空気浄化方法においては、光触媒
または光触媒を担持したフィルター等や塩基性ガス除去
フィルターなどに通気しても良く、通気する手段は特に
限定されるものではないが、シロッコ型、軸流型、プロ
ペラ型、ターボ型、ラジアル型、クロスフロー型などの
各種ファンモータなどの送風機を用いる方法、自然風ま
たは換気扇等の排気ファンやエアコン等の空調機などが
発する風を利用する方法、熱対流による方法、乗用車な
どの移動に伴って生じる気流を利用する方法などが挙げ
られる。In the air purification method of the present invention, the air may be passed through a photocatalyst, a filter carrying the photocatalyst, or a filter for removing basic gas, and the means for passing the air is not particularly limited. Axial, propeller, turbo, radial, cross-flow and other types of fan motors and other air blowers, natural wind or air blowers and other exhaust fans and air conditioners and other air-conditioning air blowers , A method using thermal convection, and a method using an airflow generated by movement of a passenger car or the like.
【００２３】本発明の空気浄化方法は、光触媒による処
理前に塩基性ガス除去フィルターを設けることを特徴と
するが、上記のように通気を実施する場合には、光触媒
の風上に塩基性ガス除去フィルターを配置することがで
きる。The air purification method of the present invention is characterized in that a basic gas removal filter is provided before the treatment with the photocatalyst. However, when the ventilation is performed as described above, the basic gas is removed from the windward of the photocatalyst. A removal filter can be placed.
【００２４】本発明に係わる塩基性ガス除去フィルター
とは、酸性物質などを主成分とする塩基性ガス脱臭剤を
含有する脱臭フィルターであり、このような塩基性ガス
脱臭剤としては、フマル酸、マレイン酸、アクリル酸、
メタクリル酸、クロトン酸、スチレンスルフォン酸、ビ
ニル安息香酸、アルギン酸などの有機酸またはその多量
体やオリゴマーまたはポリマーなどの重合体、活性白土
などの酸性基を有する無機吸着剤および燐酸などの酸性
物質を添着した酸添着活性炭等が挙げられる。The basic gas removing filter according to the present invention is a deodorizing filter containing a basic gas deodorizing agent mainly containing an acidic substance or the like. Examples of such a basic gas deodorizing agent include fumaric acid, Maleic acid, acrylic acid,
Organic acids such as methacrylic acid, crotonic acid, styrene sulfonic acid, vinyl benzoic acid, and alginic acid or polymers such as multimers and oligomers or polymers; inorganic adsorbents having an acidic group such as activated clay; and acidic substances such as phosphoric acid. Acid-impregnated activated carbon that has been impregnated can be used.
【００２５】本発明に係わる塩基性ガス除去フィルター
は酸性ガス吸着剤を含有することができ、上記の塩基性
ガス脱臭剤とは別の酸性ガス吸着剤を含有しても良く、
また、塩基性ガス除去を目的とした脱臭剤が例えば両性
物質からなるなどして酸性ガス吸着能を併せ持っても良
い。更に、本発明に係わる塩基性ガス除去フィルター
は、塩基性ガス脱臭剤や酸性ガス吸着剤以外にも後述す
る各種の脱臭剤や抗菌剤の他、防ダニ剤等の防虫剤や殺
虫剤、害虫忌避剤、芳香剤などの各種薬剤等を含有して
も良く、また、エレクトレットフィルターなどの除塵フ
ィルターと併用しても良い。The basic gas removal filter according to the present invention may contain an acid gas adsorbent, and may contain another acid gas adsorbent other than the above basic gas deodorant.
Further, the deodorant for the purpose of removing the basic gas may be made of, for example, an amphoteric substance and also have an acidic gas adsorption ability. Furthermore, the basic gas removal filter according to the present invention is not limited to a basic gas deodorant and an acidic gas adsorbent, and includes various deodorants and antibacterial agents described below, as well as insect repellents and insecticides such as mites, and insect pests. It may contain various agents such as repellents and fragrances, and may be used in combination with a dust filter such as an electret filter.
【００２６】本発明に係わる塩基性ガス除去フィルター
は、例えば水酸化カリウムなどの塩基性物質を添着した
塩基添着活性炭等の酸性ガス吸着剤を含有しないことが
好ましい。より具体的には、本発明に係わる塩基性ガス
除去フィルターはＪＩＳ−Ｂ−９９０１に準拠して測定
される酢酸のガス除去率すなわち酢酸除去率が３０％以
下であることが好ましく、当初予期しなかったことでは
あるが、光触媒による脱臭性が著しく向上することが分
かった。なお、本発明に係わる酢酸除去率は、本発明の
空気浄化方法が適用される条件下での風速または風量に
おいて測定すれば良い。The basic gas removing filter according to the present invention preferably does not contain an acidic gas adsorbent such as a base impregnated activated carbon impregnated with a basic substance such as potassium hydroxide. More specifically, the basic gas removal filter according to the present invention preferably has an acetic acid gas removal rate, that is, an acetic acid removal rate of 30% or less, measured according to JIS-B-9901. Although it was not, it was found that the deodorization by the photocatalyst was significantly improved. The acetic acid removal rate according to the present invention may be measured at a wind speed or a flow rate under conditions to which the air purification method of the present invention is applied.
【００２７】光触媒から発生した電子が表面に吸着した
酸素を攻撃して生成するスーパーオキサイドアニオンＯ
2 -はそれほど高い反応性を持たないが、プロトン化され
てペルオキシラジカルＨＯＯ・になると反応性が大幅に
高まるため、予め塩基性ガスを除去することにより上記
のプロトン化を阻害する因子が取り除かれ、更に酸性ガ
スを残すことでプロトン化が促進され、光触媒を用いた
脱臭性が大きく向上したものと考えられる。The superoxide anion O generated by the electrons generated from the photocatalyst attacking the oxygen adsorbed on the surface
2 - does not have a very high reactivity, because protonated significantly increases the reactivity to become peroxy radicals HOO ·, factors that inhibit protonation of the is removed by removing the pre-basic gas It is considered that protonation was promoted by further leaving the acidic gas, and deodorization using a photocatalyst was greatly improved.
【００２８】本発明に用いられる脱臭剤は主に悪臭を除
去する目的で用いられる薬剤であり、具体的には、活性
炭、添着活性炭、ゼオライト、セピオライト、活性アル
ミナ、活性白土、イオン交換樹脂、鉄アスコルビン酸、
鉄フタロシアニン誘導体などの吸着脱臭剤、マンガン系
酸化物やペロブスカイト型触媒などの低温酸化触媒、炭
化珪素、窒化珪素、珪酸カルシウム、アルミナ・シリカ
系、ジルコニア系などの合成セラミクスや麦飯石、フェ
ルソング石などの遠赤外線セラミクス、植物抽出成分に
含まれる化合物であるフィトンチット、カテキン、タン
ニン、フラボノイド等を用いた消臭剤などが挙げられ
る。これらの脱臭剤は必要に応じて複数のものを併用し
ても良く、また、これらの脱臭剤を複合化したハイブリ
ット脱臭剤としても良い。The deodorant used in the present invention is a chemical used mainly for the purpose of removing offensive odor. Specifically, activated carbon, impregnated activated carbon, zeolite, sepiolite, activated alumina, activated clay, ion exchange resin, iron exchange resin Ascorbic acid,
Adsorbent deodorizers such as iron phthalocyanine derivatives, low-temperature oxidation catalysts such as manganese oxides and perovskite catalysts, synthetic ceramics such as silicon carbide, silicon nitride, calcium silicate, alumina / silica, zirconia, etc. And deodorants using phytonchit, catechin, tannin, flavonoids and the like, which are compounds contained in plant extract components. If necessary, a plurality of these deodorants may be used in combination, or a hybrid deodorant obtained by combining these deodorants may be used.
【００２９】光触媒と併用担持される脱臭剤は、吸着
剤、中でも対象とする主な臭気物質に対して物理吸着を
主体とするものが好ましく、特に臭気物質の吸着熱量が
11kcal/mol以下であることが好ましく、臭気物質によっ
て脱臭性が飽和すること無く光触媒により再生される。
更に、光触媒と併用担持される脱臭剤は酸吸着性が低い
ものが好ましく、特にＪＩＳ−Ｋ−１４７４に準拠して
測定されるｐＨ値が５．０以下であることが好ましく、
光触媒反応に起因する反応性に富む活性種を有効に活か
すことが可能となる。このような脱臭剤として具体的に
は、活性白土などの無機吸着剤および燐酸などを添着し
た酸添着活性炭等が挙げられる。The deodorizing agent carried in combination with the photocatalyst is preferably an adsorbent, especially one that mainly carries out physical adsorption on the main odorous substance of interest.
It is preferably 11 kcal / mol or less, and the photocatalyst is regenerated without saturating the deodorizing property by the odorous substance.
Further, the deodorant carried in combination with the photocatalyst preferably has a low acid-adsorbing property, and particularly preferably has a pH value of 5.0 or less measured in accordance with JIS-K-1474,
It is possible to effectively utilize active species having high reactivity caused by the photocatalytic reaction. Specific examples of such a deodorant include an inorganic adsorbent such as activated clay and an acid-impregnated activated carbon impregnated with phosphoric acid or the like.
【００３０】例えば酸添着活性炭であれば、アンモニア
などの塩基性ガスを不可逆的に化学吸着する性能を有す
るが、本発明においては光触媒による処理前に塩基性ガ
ス除去フィルターが設けられており、光触媒脱臭の対象
となる主な臭気物質からは除外されるため、このような
脱臭剤も物理吸着を主体とすると見なし得ることは云う
までもない。For example, an acid-impregnated activated carbon has a performance of irreversibly chemically adsorbing a basic gas such as ammonia. However, in the present invention, a filter for removing a basic gas is provided before the treatment with a photocatalyst. It is needless to say that such a deodorizing agent can be regarded as mainly based on physical adsorption, because it is excluded from the main odorants to be deodorized.
【００３１】本発明に用いられる抗菌剤は、細菌、黴類
またはウイルスなどの有害微生物および病原体の除去、
殺滅、失活または繁殖抑制などの目的で用いられる薬剤
であり、具体的には、銀や亜鉛または燐酸カルシウムな
どを主成分とする無機系抗菌剤、ベンツイミダゾール
系、イソチアゾリン系、ピリチオン系、クロロヘキシジ
ン系などの有機系抗菌剤、キチンやキトサンなどの高分
子系抗菌剤、茶や柿などから抽出されるカテキンや孟宋
竹抽出エキス、ヒノキチオールなどの天然物由来の抗菌
剤およびこれらを複合したハイブリット抗菌剤などが挙
げられる。The antimicrobial agent used in the present invention can remove harmful microorganisms such as bacteria, molds or viruses and pathogens,
It is a drug used for the purpose of killing, inactivating or suppressing reproduction, specifically, an inorganic antibacterial agent containing silver, zinc or calcium phosphate as a main component, benzimidazole, isothiazoline, pyrithione, Organic antibacterial agents such as chlorohexidine, high molecular antibacterial agents such as chitin and chitosan, catechin extracted from tea and persimmon, Meng Song bamboo extract, antibacterial agents derived from natural products such as hinokitiol and composites of these And a hybrid antibacterial agent.
【００３２】本発明の空気浄化方法は、本発明の趣旨を
逸脱しない限りにおいて、抗菌フィルターなどの各種フ
ィルター、オゾン脱臭器などの脱臭手段またはエレクト
レットフィルターやＨＥＰＡフィルターなど除塵フィル
ターや集塵電極ユニットなどの除塵手段を併用しても良
く、特に集塵手段は、一般的に光触媒および光源よりも
風上に設置されることが好ましい。The air purification method of the present invention can be applied to various filters such as an antibacterial filter, deodorizing means such as an ozone deodorizer, a dust removing filter such as an electret filter or a HEPA filter, a dust collecting electrode unit, etc., without departing from the spirit of the present invention. In particular, it is preferable that the dust collecting means is generally installed more windward than the photocatalyst and the light source.
【００３３】[0033]
【実施例】以下、本発明を実施例により説明するが、本
発明の趣旨を逸脱しない限り、実施例に限定されるもの
ではない。EXAMPLES The present invention will be described below with reference to examples, but it should not be construed that the invention is limited thereto without departing from the spirit of the present invention.
【００３４】実施例１ 図１に示すように、本発明の一実施例を示す空気浄化方
法に該当する装置は、吸気口１と排気口２を有する筐体
３の内部に、吸気口側すなわち風上から順に、エレクト
レットフィルター濾材をプリーツ加工してなる除塵フィ
ルター４、燐酸添着活性炭を含有する塩基性ガス除去フ
ィルター５、光触媒として酸化チタンおよび吸着剤とし
て活性白土を担持した光触媒部材６（商品名：ラジット
光触媒コルゲート、三菱製紙製）、ブラックライトから
なる光触媒励起光源７および軸流ファンモータからなる
送風機８を配してなる。この装置を用いた空気浄化方法
を実施例１の空気浄化方法とした。Embodiment 1 As shown in FIG. 1, an apparatus corresponding to an air purification method according to an embodiment of the present invention includes a housing 3 having an intake port 1 and an exhaust port 2 inside an intake port, A dust filter 4 formed by pleating an electret filter medium, a basic gas removing filter 5 containing activated carbon impregnated with phosphoric acid, a photocatalyst member 6 carrying titanium oxide as a photocatalyst and activated clay as an adsorbent in order from the windward side. , A photocatalytic excitation light source 7 composed of a black light, and a blower 8 composed of an axial fan motor. The air purification method using this device was referred to as the air purification method of Example 1.
【００３５】実施例２ 実施例１において、燐酸添着活性炭を含有する塩基性ガ
ス除去フィルターに代えて、フマル酸系有機酸−亜鉛化
合物を含有する塩基性ガス除去フィルターとする以外は
全て実施例１と同様とし、これを実施例２の空気浄化方
法とした。Example 2 Example 1 was repeated except that the filter for removing basic gas containing activated carbon impregnated with phosphoric acid was replaced with a filter for removing basic gas containing a fumaric acid-based organic acid-zinc compound. This was used as the air purification method of Example 2.
【００３６】比較例１ 実施例１において、塩基性ガス除去フィルター５の位置
を光触媒励起光源７と送風機８の間に移動させる以外は
全て実施例１と同様とし、これを比較例１の空気浄化方
法とした。Comparative Example 1 The same procedure as in Example 1 was carried out except that the position of the basic gas removal filter 5 was moved between the photocatalytic excitation light source 7 and the blower 8. Method.
【００３７】次いで、実施例１、２および比較例１の空
気浄化方法の脱臭性を以下の方法で測定し、その結果を
表１に示した。Next, the deodorizing properties of the air purifying methods of Examples 1 and 2 and Comparative Example 1 were measured by the following methods, and the results are shown in Table 1.
【００３８】［脱臭試験１］実施例および比較例の空気
浄化方法に該当する装置を１立米の密閉容器内に設置し
て、アセトアルデヒド１０ｐｐｍを注入した後に、光触
媒励起光源７を点灯し且つ送風機８を運転し、１０分後
のアセトアルデヒド濃度をガスクロマトグラフを用いて
測定して除去率（％）を求め、この結果を脱臭性１とし
た。[Deodorization Test 1] Apparatuses corresponding to the air purification methods of Examples and Comparative Examples were installed in a 1-m3 closed container, and after 10 ppm of acetaldehyde was injected, the photocatalyst excitation light source 7 was turned on and the blower 8 was turned on. Was operated, and the acetaldehyde concentration after 10 minutes was measured using a gas chromatograph to obtain a removal rate (%).
【００３９】［脱臭試験２］実施例および比較例の空気
浄化方法に該当する装置を１立米の密閉容器内に設置し
て、ＪＥＭ−１４７６に記載の脱臭性能試験に準拠して
タバコ５本を燃焼させた後に、光触媒励起光源７を点灯
し且つ送風機８を運転し、１０分後のアセトアルデヒド
濃度をガスクロマトグラフを用いて、またアンモニアお
よび酢酸の濃度をガス検知管を用いて測定して各臭気の
除去率（％）を求め、この結果を脱臭性２とした。[Deodorization Test 2] Apparatuses corresponding to the air purification methods of Examples and Comparative Examples were installed in a 1-m3 closed container, and five cigarettes were used in accordance with the deodorization performance test described in JEM-1476. After burning, the photocatalyst excitation light source 7 is turned on and the blower 8 is operated, and the acetaldehyde concentration after 10 minutes is measured using a gas chromatograph, and the concentrations of ammonia and acetic acid are measured using a gas detection tube, and each odor is measured. Was determined, and the result was defined as deodorizing property 2.
【００４０】［複合ガス脱臭指標］実施例および比較例
の空気浄化方法について、上記の方法により求めた脱臭
性２のアセトアルデヒド除去率（％）を脱臭性１のアセ
トアルデヒド除去率（％）で除した値を複合ガス脱臭指
標とした。この複合ガス脱臭指標の値が大きいほど複合
ガスに対する光触媒の脱臭性が高いことを示す。[Composite gas deodorization index] With respect to the air purification methods of Examples and Comparative Examples, the acetaldehyde removal rate (%) of deodorant 2 obtained by the above method was divided by the acetaldehyde removal rate (%) of deodorant 1. The value was used as the composite gas deodorization index. The larger the value of the composite gas deodorization index, the higher the deodorizing property of the photocatalyst with respect to the composite gas.
【００４１】［予備脱臭試験］実施例の空気浄化方法に
用いた塩基性ガス除去フィルターの酢酸２０±２ｐｐｍ
に対する除去率をＪＩＳ−Ｂ−９９０１に準拠して測定
し、この結果を塩基性ガス除去フィルターの酢酸除去率
（％）とした。[Preliminary deodorization test] 20 ± 2 ppm of acetic acid in the basic gas removal filter used in the air purification method of the example
Was measured in accordance with JIS-B-9901, and the result was defined as the acetic acid removal rate (%) of the basic gas removal filter.
【００４２】[0042]
【表１】 [Table 1]
【００４３】[0043]
【発明の効果】本発明の空気浄化方法は、光触媒を用い
た空気浄化方法において光触媒による処理前に塩基性ガ
ス除去フィルターを設けることを特徴とし、脱臭効率が
高く、特に複合臭気に対する除去性が優れたものであ
る。中でも、塩基性ガス除去フィルターが酸性ガス吸着
剤を含有せず、好ましくは酢酸除去率が３０％以下の場
合には、脱臭効率が更に高く、複合臭気に対する除去性
が一層優れた空気浄化方法が得られる。このような本発
明の空気浄化方法は家庭用空気清浄機や脱臭器、産業用
の空調機器などに用いられる脱臭手段として特に有用な
ものである。The air purification method of the present invention is characterized in that a basic gas removal filter is provided before the treatment with a photocatalyst in the air purification method using a photocatalyst, so that the deodorization efficiency is high, and particularly, the removal of complex odors is improved. It is excellent. Above all, when the basic gas removal filter does not contain an acid gas adsorbent and the acetic acid removal rate is preferably 30% or less, an air purification method with higher deodorization efficiency and more excellent removability for complex odors is provided. can get. Such an air purification method of the present invention is particularly useful as a deodorizing means used in household air purifiers, deodorizers, industrial air conditioners, and the like.
【図１】本発明の空気浄化方法の一実施例に該当する装
置を示す側面の断面図である。FIG. 1 is a side sectional view showing an apparatus according to an embodiment of the air purification method of the present invention.
１ 吸気口 ２ 排気口 ３ 筐体 ４ 除塵フィルター ５ 塩基性ガス除去フィルター ６ 光触媒部材 ７ 光触媒励起光源 ８ 送風機 DESCRIPTION OF SYMBOLS 1 Intake port 2 Exhaust port 3 Case 4 Dust removal filter 5 Basic gas removal filter 6 Photocatalyst member 7 Photocatalyst excitation light source 8 Blower
フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ テーマコート゛(参考） Ｂ０１Ｄ 53/36 Ｈ Ｆターム(参考） 4C080 AA05 AA07 BB02 CC02 CC08 CC12 HH05 JJ03 KK08 LL10 MM02 QQ03 QQ11 QQ17 QQ20 4D048 AA08 AA17 AA19 AA22 BA07X BA09X BA13X BA16Y BA19Y BA27Y BA41X BB02 BB03 BB04 BB07 BB08 BB09 CC40 CD01 CD05 EA01 EA04 4G066 AA05B AA50B AA64B AB07B BA38 CA02 CA07 CA29 CA52 DA03 4G069 AA03 BA04A BA04B BA10B BA48A BB04A BC35A BC43A BC60A CA10 CA17 EA09 EA12 EA18 EB02 EB11 Continued on the front page (51) Int.Cl. 7 Identification code FI Theme coat II (reference) B01D 53/36 HF term (reference) 4C080 AA05 AA07 BB02 CC02 CC08 CC12 HH05 JJ03 KK08 LL10 MM02 QQ03 QQ11 QQ17 QQ20 4D048 AA08 AA17 AA19 AA22 BA07X BA09X BA13X BA16Y BA19Y BA27Y BA41X BB02 BB03 BB04 BB07 BB08 BB09 CC40 CD01 CD05 EA01 EA04 4G066 AA05B AA50B AA64B AB07B BA38 CA02 CA07 CA29 CA52 DA03 4G069 AA03 BA04ABA EA03 BA04ABA BAB BC
Claims (4)
光触媒による処理前に塩基性ガス除去フィルターを設け
ることを特徴とする空気浄化方法。1. An air purification method using a photocatalyst,
An air purification method comprising providing a basic gas removal filter before treatment with a photocatalyst.
吸着剤を含有することを特徴とする請求項１記載の空気
浄化方法。2. The air purification method according to claim 1, wherein the basic gas removal filter contains an acid gas adsorbent.
吸着剤を含有しないことを特徴とする請求項１記載の空
気浄化方法。3. The air purification method according to claim 1, wherein the basic gas removing filter does not contain an acidic gas adsorbent.
率が３０％以下であることを特徴とする請求項１または
３記載の空気浄化方法。4. The air purification method according to claim 1, wherein the acetic acid removal rate of the basic gas removal filter is 30% or less.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25498899A JP4030234B2 (en) | 1999-09-09 | 1999-09-09 | Air purification method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25498899A JP4030234B2 (en) | 1999-09-09 | 1999-09-09 | Air purification method |
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| Publication Number | Publication Date |
|---|---|
| JP2001070419A true JP2001070419A (en) | 2001-03-21 |
| JP4030234B2 JP4030234B2 (en) | 2008-01-09 |
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ID=17272657
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP25498899A Expired - Fee Related JP4030234B2 (en) | 1999-09-09 | 1999-09-09 | Air purification method |
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| Country | Link |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007055430A1 (en) * | 2005-11-08 | 2007-05-18 | Young Jung Bang | Air purifier with sterilization, deodorization and absorbing toxic materials |
| WO2007116130A1 (en) * | 2006-04-10 | 2007-10-18 | Raimo Vartiainen | Procedure and apparatus for cleaning of air |
| KR101003195B1 (en) * | 2010-06-18 | 2010-12-21 | 경북대학교 산학협력단 | Wastebox having the function of air cleaning |
| WO2015114959A1 (en) * | 2014-02-03 | 2015-08-06 | 株式会社炭化 | Freshness retaining agent, method for manufacturing same, gas purification device and gas purification system |
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| JP2018121748A (en) * | 2017-01-30 | 2018-08-09 | 吉澤石灰工業株式会社 | Antibacterial deodorization agent and antibacterial deodorization method |
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1999
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007055430A1 (en) * | 2005-11-08 | 2007-05-18 | Young Jung Bang | Air purifier with sterilization, deodorization and absorbing toxic materials |
| WO2007116130A1 (en) * | 2006-04-10 | 2007-10-18 | Raimo Vartiainen | Procedure and apparatus for cleaning of air |
| KR101003195B1 (en) * | 2010-06-18 | 2010-12-21 | 경북대학교 산학협력단 | Wastebox having the function of air cleaning |
| WO2015114959A1 (en) * | 2014-02-03 | 2015-08-06 | 株式会社炭化 | Freshness retaining agent, method for manufacturing same, gas purification device and gas purification system |
| CN105992515A (en) * | 2014-02-03 | 2016-10-05 | 株式会社炭化 | Freshness retaining agent, method for manufacturing same, gas purification device and gas purification system |
| JPWO2015114959A1 (en) * | 2014-02-03 | 2017-03-23 | 株式会社炭化 | Freshness-preserving agent, method for producing the same, gas purification device, and gas purification system |
| US10098365B2 (en) | 2014-02-03 | 2018-10-16 | Tanka Co., Ltd. | Freshness retaining agent, method for manufacturing the same, gas purification device, and gas purification system |
| KR101680887B1 (en) * | 2015-04-23 | 2016-11-29 | 주식회사 환기 | air cleaner |
| JP2018121748A (en) * | 2017-01-30 | 2018-08-09 | 吉澤石灰工業株式会社 | Antibacterial deodorization agent and antibacterial deodorization method |
| JP2020076690A (en) * | 2018-11-09 | 2020-05-21 | 矢崎エナジーシステム株式会社 | Filter for gas sensor and gas sensor |
| JP7090016B2 (en) | 2018-11-09 | 2022-06-23 | 矢崎エナジーシステム株式会社 | Filters for gas sensors and gas sensors |
| CN113304580A (en) * | 2021-05-28 | 2021-08-27 | 虚静科技(广州)有限责任公司 | VOCs gas adsorption equipment based on persimmon tannin |
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