JP2928976B2 - Detoxification method of harmful organic substances - Google Patents
Detoxification method of harmful organic substancesInfo
- Publication number
- JP2928976B2 JP2928976B2 JP6059901A JP5990194A JP2928976B2 JP 2928976 B2 JP2928976 B2 JP 2928976B2 JP 6059901 A JP6059901 A JP 6059901A JP 5990194 A JP5990194 A JP 5990194A JP 2928976 B2 JP2928976 B2 JP 2928976B2
- Authority
- JP
- Japan
- Prior art keywords
- harmful organic
- photocatalyst
- organic substances
- ultraviolet light
- vacuum ultraviolet
- 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.)
- Expired - Lifetime
Links
- 239000000126 substance Substances 0.000 title claims description 29
- 238000000034 method Methods 0.000 title claims description 21
- 238000001784 detoxification Methods 0.000 title description 8
- 239000011941 photocatalyst Substances 0.000 claims description 28
- 239000007789 gas Substances 0.000 claims description 8
- 239000000203 mixture Substances 0.000 claims description 6
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 5
- 229910052760 oxygen Inorganic materials 0.000 claims description 5
- 239000001301 oxygen Substances 0.000 claims description 5
- 239000003463 adsorbent Substances 0.000 claims description 4
- 239000003513 alkali Substances 0.000 claims description 4
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 21
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 12
- 238000006243 chemical reaction Methods 0.000 description 12
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 10
- 238000000354 decomposition reaction Methods 0.000 description 10
- 239000000243 solution Substances 0.000 description 8
- 239000003054 catalyst Substances 0.000 description 7
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 5
- 239000001569 carbon dioxide Substances 0.000 description 5
- 229910002092 carbon dioxide Inorganic materials 0.000 description 5
- 150000002894 organic compounds Chemical class 0.000 description 5
- 239000000047 product Substances 0.000 description 5
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 4
- 238000001035 drying Methods 0.000 description 4
- 229910052736 halogen Inorganic materials 0.000 description 4
- 150000002367 halogens Chemical class 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 230000001699 photocatalysis Effects 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 239000000543 intermediate Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 150000002736 metal compounds Chemical class 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- UOCLXMDMGBRAIB-UHFFFAOYSA-N 1,1,1-trichloroethane Chemical compound CC(Cl)(Cl)Cl UOCLXMDMGBRAIB-UHFFFAOYSA-N 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 2
- 150000001491 aromatic compounds Chemical class 0.000 description 2
- 239000000460 chlorine Substances 0.000 description 2
- 229910052801 chlorine Inorganic materials 0.000 description 2
- 230000001678 irradiating effect Effects 0.000 description 2
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 2
- 229910052753 mercury Inorganic materials 0.000 description 2
- 239000005416 organic matter Substances 0.000 description 2
- 239000003960 organic solvent Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 239000010453 quartz Substances 0.000 description 2
- VZGDMQKNWNREIO-UHFFFAOYSA-N tetrachloromethane Chemical compound ClC(Cl)(Cl)Cl VZGDMQKNWNREIO-UHFFFAOYSA-N 0.000 description 2
- 239000004408 titanium dioxide Substances 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 235000010724 Wisteria floribunda Nutrition 0.000 description 1
- 239000003570 air Substances 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 1
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 1
- 239000000292 calcium oxide Substances 0.000 description 1
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 229910001882 dioxygen Inorganic materials 0.000 description 1
- 239000000706 filtrate Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000011491 glass wool Substances 0.000 description 1
- 239000002241 glass-ceramic Substances 0.000 description 1
- 150000004820 halides Chemical class 0.000 description 1
- 231100001261 hazardous Toxicity 0.000 description 1
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 description 1
- 239000000347 magnesium hydroxide Substances 0.000 description 1
- 229910001862 magnesium hydroxide Inorganic materials 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- QGLKJKCYBOYXKC-UHFFFAOYSA-N nonaoxidotritungsten Chemical compound O=[W]1(=O)O[W](=O)(=O)O[W](=O)(=O)O1 QGLKJKCYBOYXKC-UHFFFAOYSA-N 0.000 description 1
- 150000002896 organic halogen compounds Chemical class 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 238000009877 rendering Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
- 239000004945 silicone rubber Substances 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
- 229910001930 tungsten oxide Inorganic materials 0.000 description 1
- 239000008096 xylene Substances 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
- 229910001928 zirconium oxide Inorganic materials 0.000 description 1
Landscapes
- Fire-Extinguishing Compositions (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
- Catalysts (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は有害有機化合物の無害化
方法に関するものである。The present invention relates to a method for detoxifying harmful organic compounds.
【０００２】[0002]
【従来の技術】光触媒としては各種のものが知られてお
り、その光源としては長波長光（〜４１０ｎｍ）を用い
ることができ、従来からも、有害有機化合物を太陽光や
蛍光灯の照射下において光触媒と接触させることにより
無害化する方法も提案されている。しかしながら、この
ような方法では、その有機化合物の分解に長時間を有す
る上、飽和の有機ハロゲン化合物を分解できないという
欠点がある。光触媒を用いる有害有機化合物の分解によ
る無害化に見られる前記の欠点を克服するために、光触
媒の改良についての研究も行われているが、格別の成果
は得られていない。2. Description of the Related Art Various types of photocatalysts are known, and long-wavelength light (up to 410 nm) can be used as a light source thereof. Also, a method of detoxification by contact with a photocatalyst has been proposed. However, such a method has the disadvantage that the decomposition of the organic compound takes a long time and the saturated organic halogen compound cannot be decomposed. In order to overcome the above-mentioned drawbacks of detoxification by decomposing harmful organic compounds using a photocatalyst, studies on improvement of the photocatalyst have been made, but no particular results have been obtained.
【０００３】[0003]
【発明が解決しようとする課題】本発明の課題は以下の
通りである。 （１）有害有機物を効率よく無害化する方法を提供する
こと。 （２）有害有機物を光触媒を用いて効率よく分解し、無
害化する方法を提供すること。 （３）有害有機物を光触媒下で分解した後の無害化処理
生成物を完全無害化する方法を提供すること。 （４）有害有機物の光分解を効率よく行わせる光触媒を
提供すること。The objects of the present invention are as follows. (1) To provide a method for efficiently detoxifying harmful organic substances. (2) To provide a method for decomposing harmful organic substances efficiently by using a photocatalyst to render them harmless. (3) To provide a method for completely detoxifying a detoxification treatment product after decomposing harmful organic substances under a photocatalyst. (4) To provide a photocatalyst that efficiently decomposes harmful organic substances.
【０００４】[0004]
【課題を解決するための手段】本発明者らは、前記課題
を解決すべく鋭意研究を重ねた結果、本発明を完成する
に至った。すなわち、本発明によれば、真空紫外光照射
下において、芳香族化合物及びハロゲン含有有機化合物
から選ばれる有害有機物の蒸気と酸素を含み、該有害有
機物質の蒸気濃度が１００，０００〜１ｖｏｌｐｐｍで
ある気体混合物を光触媒と接触させることを特徴とする
有害有機物の無害化処理方法が提供される。また、本発
明によれば、前記の方法で得られた処理ガスをアルカリ
水溶液又は吸着剤と接触させることを特徴とする有害有
機物の無害化方法が提供される。Means for Solving the Problems The present inventors have made intensive studies to solve the above-mentioned problems, and as a result, have completed the present invention. That is, according to the present invention, under vacuum ultraviolet light irradiation, it contains vapor and oxygen of a harmful organic substance selected from an aromatic compound and a halogen-containing organic compound, and the vapor concentration of the harmful organic substance is 100,000 to 1 volppm. A method for detoxifying harmful organic substances, comprising contacting a gas mixture with a photocatalyst is provided. Further, according to the present invention, there is provided a method for detoxifying harmful organic substances, which comprises contacting the processing gas obtained by the above method with an aqueous alkali solution or an adsorbent.
【０００５】本発明で用いる光触媒としては従来公知の
ものを用いることができる。このようなものとしては、
二酸化チタン、酸化亜鉛、酸化ジルコニウム、酸化タン
グステン等が挙げられる。本発明では、これらの触媒
は、反応管内に配置する。その配置の方法としては、反
応管内表面に光触媒を膜状に付着させる方法、支持体上
に形成した光触媒膜を反応管内に設置する方法等があ
る。As the photocatalyst used in the present invention, conventionally known photocatalysts can be used. As such,
Examples include titanium dioxide, zinc oxide, zirconium oxide, and tungsten oxide. In the present invention, these catalysts are arranged in a reaction tube. As a method of the arrangement, there are a method of attaching a photocatalyst to the inner surface of the reaction tube in a film form, a method of installing a photocatalyst film formed on a support in the reaction tube, and the like.
【０００６】図１に本発明で用いる反応装置の一例につ
いての説明断面図を示す。この図において、１は反応
管、２は真空紫外光発生用の光源、３は光触媒膜、４は
有害有機物供給管、５は有害有機物を無害化処理して得
られる処理物の排出管を示す。Ａは光源２と光触媒３と
の間に形成された環状空間部を示す。光触媒は、反応管
１の内壁面に膜状に支持させる方法、支持体状に支持さ
せた光触媒膜を環状空間部Ａ内に設置する方法等があ
る。図１には、反応管１の内壁面に光触媒膜３を配設し
た例が示されている。FIG. 1 is an explanatory sectional view of an example of the reaction apparatus used in the present invention. In this figure, 1 is a reaction tube, 2 is a light source for generating vacuum ultraviolet light, 3 is a photocatalytic film, 4 is a harmful organic substance supply pipe, and 5 is a discharge pipe of a processed product obtained by detoxifying harmful organic substances. . A indicates an annular space formed between the light source 2 and the photocatalyst 3. The photocatalyst includes a method in which the photocatalyst is supported in the form of a film on the inner wall surface of the reaction tube 1 and a method in which the photocatalyst film supported in the form of a support is installed in the annular space A. FIG. 1 shows an example in which a photocatalyst film 3 is provided on the inner wall surface of a reaction tube 1.
【０００７】図１に示す反応装置を用いて有害有機物を
無害化処理するには、先ず、真空紫外光発生光源２を作
動させて真空紫外光を発生させる。これによって光触媒
膜３はその真空紫外光の照射を受け、活性化される。次
に、この状態において、有害有機物の気体を含む空気を
供給管４を通して反応管１内に導入し、環状空間部Ａ内
を流通させる。有害有機物はこの環状空間部を通過する
際に真空紫外光の照射を受ける。真空紫外光の照射を受
けた有害有機物は励起されるとともに、少なくともその
一部は分解されるが、この場合の分解は不完全であり、
有害な中間体を生成する場合が多い。光触媒は、真空紫
外光により励起された有害有機物及びその分解により生
成した中間体の分解を促進させ、無害化させる。環状空
間部Ａ内に共存する酸素は、真空紫外光の照射を受けて
オゾンを生成するが、このオゾンは、光励起された光触
媒上の電子受容体となり、有害有機物及びその分解によ
り生成した中間体の分解反応を促進させるとともに、そ
の分解反応を持続させる。In order to detoxify harmful organic substances using the reactor shown in FIG. 1, first, the vacuum ultraviolet light generating light source 2 is operated to generate vacuum ultraviolet light. Thereby, the photocatalyst film 3 is activated by receiving the irradiation of the vacuum ultraviolet light. Next, in this state, air containing a gas of harmful organic substances is introduced into the reaction tube 1 through the supply tube 4 and circulates in the annular space A. The harmful organic substances are irradiated with vacuum ultraviolet light when passing through the annular space. The harmful organic substances irradiated with the vacuum ultraviolet light are excited and at least partly decomposed, but the decomposition in this case is incomplete,
Often produces harmful intermediates. The photocatalyst promotes the decomposition of harmful organic substances excited by vacuum ultraviolet light and the intermediates generated by decomposition thereof, thereby rendering them harmless. Oxygen coexisting in the annular space A generates ozone upon irradiation with vacuum ultraviolet light, and this ozone becomes an electron acceptor on the photoexcited photocatalyst, and is a harmful organic substance and an intermediate produced by its decomposition. Promotes the decomposition reaction and maintains the decomposition reaction.
【０００８】前記のようにして有害有機物の無害化処理
により得られる気体状の処理物は、その排出管５を通っ
て排出される。この排出処理物は、オゾンを含むととも
に、有害有機物が含ハロゲン化物である場合にはハロゲ
ンを含むが、このようなオゾンやハロゲンはアルカリ水
溶液や吸着剤と接触させることにより処理物から分離除
去することができる。アルカリ水溶液としては、水酸化
ナトリウム水溶液、炭酸ナトリウム水溶液、水酸化カル
シウム水溶液、水酸化マグネシウム水溶液等が挙げられ
る。また、吸着剤としては、活性炭、酸化マグネシウ
ム、酸化アルミニウム、酸化カルシウム等が挙げられ
る。[0008] The gaseous processed material obtained by the detoxification treatment of harmful organic substances as described above is discharged through the discharge pipe 5. The discharged treated product contains ozone and, when the harmful organic substance is a halide-containing product, contains halogen. Such ozone and halogen are separated and removed from the treated product by contact with an aqueous alkali solution or an adsorbent. be able to. Examples of the aqueous alkali solution include an aqueous sodium hydroxide solution, an aqueous sodium carbonate solution, an aqueous calcium hydroxide solution, and an aqueous magnesium hydroxide solution. In addition, examples of the adsorbent include activated carbon, magnesium oxide, aluminum oxide, and calcium oxide.
【０００９】図１に示した反応装置において、真空紫外
光の発生光源２としては、真空紫外光を発生するもので
あればどのようなものでも使用することができ、例え
ば、低圧水銀灯の管球を真空紫外光の透過性にすぐれた
合成石英で作製した、１８５ｎｍの波長光を主成分とす
る真空紫外光を発生するものを好ましく用いることがで
きる。また、反応管１の内壁面に形成した触媒膜３の厚
さは特に制約されないが、真空紫外光の透過を遮断し得
る範囲の厚さに規定するのが好ましい。反応管１の材質
は特に制約されず、ガラスや金属、プラスチック、セラ
ミックス等であることができる。In the reaction apparatus shown in FIG. 1, any light source that generates vacuum ultraviolet light can be used as the light source 2 for generating vacuum ultraviolet light. For example, a tube of a low-pressure mercury lamp can be used. Is preferably made of synthetic quartz having excellent vacuum ultraviolet light transmittance and generating vacuum ultraviolet light having a wavelength of 185 nm as a main component. Further, the thickness of the catalyst film 3 formed on the inner wall surface of the reaction tube 1 is not particularly limited, but is preferably set to a thickness within a range that can block transmission of vacuum ultraviolet light. The material of the reaction tube 1 is not particularly limited, and may be glass, metal, plastic, ceramic, or the like.
【００１０】支持体上に光触媒膜を形成するには、光触
媒微粉末に少量の水や有機溶媒、あるいは水と有機溶媒
との混合物等の液体を加えてペースト状にし、これを支
持体表面に塗布乾燥すればよい。乾燥温度としてはそれ
が蒸発する温度であればよく、例えば、液体が水の場合
は６０〜１００℃の乾燥温度が採用される。この場合、
乾燥が不十分であると光触媒作用が弱くなるのでその乾
燥は充分に行うことが重要である。また、ガラスウール
やセラミックスペーパ等の機械的強度の弱い支持体で
は、この支持体を光触媒を生成する金属化合物の水溶液
中に浸漬した後、これを高温焼成し、支持体表面に付着
した金属化合物を焼結し、光触媒膜を形成するのがよ
い。なお、前記した光触媒微粉末をペースト状にする液
体や、金属化合物の水溶液中には、必要に応じ、無機系
又は有機系のバインダーを適量加えることもできる。In order to form a photocatalyst film on a support, a small amount of a liquid such as water or an organic solvent or a mixture of water and an organic solvent is added to the photocatalyst fine powder to form a paste, which is then applied to the surface of the support. What is necessary is just to apply and dry. The drying temperature may be any temperature at which it evaporates. For example, when the liquid is water, a drying temperature of 60 to 100 ° C. is employed. in this case,
If the drying is insufficient, the photocatalytic action is weakened, so it is important that the drying is performed sufficiently. In the case of a support having low mechanical strength such as glass wool or ceramics paper, the support is immersed in an aqueous solution of a metal compound that generates a photocatalyst, and then baked at a high temperature, and the metal compound adhered to the surface of the support is baked. Is sintered to form a photocatalytic film. In addition, an appropriate amount of an inorganic or organic binder can be added to the liquid for converting the photocatalyst fine powder into a paste or an aqueous solution of a metal compound, if necessary.
【００１１】本発明によれば、各種の有害有機物を効率
よく無害化することができる。有害有機物の例として
は、例えば、ベンゼン、トルエン、キシレン等の芳香族
化合物、１，１，１−トリクロロエタン、四塩化炭素等
の含ハロゲン有機化合物等を挙げることができる。これ
らの有害有機物は、酸素ガスや空気、富酸素化空気等の
ガスとの混合物として本発明の無害化処理に供される。
混合物中の有害有機物濃度は、１００，０００〜１ｖｏ
ｌｐｐｍである。また、混合物中の酸素濃度は、９９〜
５ｖｏｌ％、好ましくは９９〜２０ｖｏｌ％であること
ができる。常温で液状又は固体状の有害有機物は、これ
を加熱して気体状に保持して無害化処理に供される。According to the present invention, various harmful organic substances can be efficiently detoxified. Examples of harmful organic substances include, for example, aromatic compounds such as benzene, toluene and xylene, and halogen-containing organic compounds such as 1,1,1-trichloroethane and carbon tetrachloride. These harmful organic substances are subjected to the detoxification treatment of the present invention as a mixture with a gas such as oxygen gas, air, or oxygen-enriched air.
The concentration of harmful organic substances in the mixture is 100,000 to 1 vo
1 ppm. The oxygen concentration in the mixture is 99 to
It can be 5 vol%, preferably 99 to 20 vol%. The harmful organic substance in a liquid or solid state at normal temperature is heated and maintained in a gaseous state to be subjected to a detoxification treatment.
【００１２】[0012]
【実施例】次に本発明を実施例によりさらに詳細に説明
する。Next, the present invention will be described in more detail with reference to examples.
【００１３】実施例１ ５×５×１０ｍｍの石英セルの側面に富士チタン製二酸
化チタンＴＰ−２（アナタース）を少量の水に懸濁させ
て塗布した。これを乾燥機に入れ、８０℃で一昼夜乾燥
した。このセルに２，０７５ｐｐｍ（ｖｏｌｐｐｍ、以
下同じ）のベンゼン蒸気を入れ、シリコンゴムセプタム
付きの栓をした。管球が合成石英ガラス製の４０Ｗ低圧
水銀灯でセルの側面より５．５ｃｍの距離から２０分間
照射した。ベンゼンは１６６ｐｐｍとなった。更に１０
分間照射するとほとんど０となった。このとき炭酸ガス
の生成量はベンゼンが完全分解したと考えたときの計算
値の６２％であり、３０分間で６２％が無機化して無害
化されていることが分かった。因みに、触媒なしで、光
のみでは２０分間でベンゼンは１６０３ｐｐｍより７８
５ｐｐｍに減少し、炭酸ガスは計算値の８％が生成し
た。また３０分間ではベンゼンは４８１ｐｐｍとなり、
炭酸ガスの生成量は計算値の１０％であった。ベンゼン
の濃度が半分になる照射時間で比較すると光のみでは１
９分、触媒と光では、７分であり、触媒により照射時間
は半分以下に短縮された。更に２５４ｎｍの紫外光と触
媒では、１時間で１，１４８ｐｐｍが４２５ｐｐｍとな
り、２時間では、１７２ｐｐｍとなった。炭酸ガスの生
成量は１時間で計算値の３２％であった。この実施例よ
り、真空紫外光と触媒を用いることの利点は明らかであ
る。Example 1 A titanium dioxide TP-2 (Anatase) made by Fuji Titanium was suspended in a small amount of water and applied to the side surface of a 5 × 5 × 10 mm quartz cell. This was put into a drier and dried at 80 ° C. all day and night. 2075 ppm (vol ppm, the same applies hereinafter) of benzene vapor was put into this cell, and the cell was capped with a silicone rubber septum. The bulb was irradiated with a 40 W low pressure mercury lamp made of synthetic quartz glass from a distance of 5.5 cm from the side of the cell for 20 minutes. Benzene amounted to 166 ppm. 10 more
After irradiating for 1 minute, it became almost 0. At this time, the amount of carbon dioxide gas generated was 62% of the calculated value when benzene was considered to be completely decomposed, and it was found that 62% was made inorganic and harmless in 30 minutes. By the way, benzene can be reduced from 1603 ppm to 78
The carbon dioxide gas was reduced to 5 ppm, and 8% of the calculated value was generated. In 30 minutes, benzene becomes 481 ppm,
The amount of generated carbon dioxide was 10% of the calculated value. Compared with the irradiation time at which the benzene concentration becomes half, the light alone is 1
The irradiation time was 9 minutes, 7 minutes for the catalyst and light, and the irradiation time was reduced to less than half by the catalyst. Further, with ultraviolet light of 254 nm and the catalyst, 1,148 ppm became 425 ppm in one hour, and became 172 ppm in two hours. The amount of generated carbon dioxide was 32% of the calculated value in one hour. From this example, the advantages of using vacuum ultraviolet light and a catalyst are clear.
【００１４】実施例２ 実施例１と同様のセルにトルエンの蒸気１，２４８ｐｐ
ｍを入れ、同様の光源により、照射した。５分間でトル
エンは２５０ｐｐｍとなり、１０分間で２５ｐｐｍとな
った。炭酸ガスの生成量は２０分間で４，７００ｐｐｍ
であり、計算値の５６％であった。また１時間では、
７，８００ｐｐｍであり、計算値の９０％であった。一
方、真空紫外光のみでは３０分間で５，５１０ｐｐｍの
トルエンが２，２５９ｐｐｍとなり、触媒と真空紫外光
に比べて分解が非常に遅かった。Example 2 In the same cell as in Example 1, 1,248 pp of toluene vapor was added.
m and irradiating with the same light source. Toluene was 250 ppm in 5 minutes and 25 ppm in 10 minutes. The amount of carbon dioxide generated is 4,700 ppm in 20 minutes
And 56% of the calculated value. In one hour,
It was 7,800 ppm, which was 90% of the calculated value. On the other hand, with vacuum ultraviolet light alone, 5,510 ppm of toluene became 2,259 ppm in 30 minutes, and the decomposition was much slower than that of the catalyst and vacuum ultraviolet light.
【００１５】実施例３ 実施例１と同様にして１，１，１−トリクロロエタン１
２，２００ｐｐｍを分解した。５分間で３，１７２ｐｐ
ｍとなり、１５分間で５０ｐｐｍとなった。２０分間で
は完全に分解した。分解後、セル中に０．１Ｎ ＮａＯ
Ｈ溶液１ｍｌを加えた後、この溶液を濾過して、濾液中
の塩素イオンを測定した。７×１０-3ｍｌ／ｌの塩素が
検出された。この値はほぼ計算値と一致し、この方法で
分解により生成した塩素を除くことができた。Example 3 1,1,1-Trichloroethane 1 was prepared in the same manner as in Example 1.
Decomposed 2,200 ppm. 3,172 pp in 5 minutes
m and became 50 ppm in 15 minutes. It was completely decomposed in 20 minutes. After decomposition, 0.1N NaO
After adding 1 ml of the H solution, the solution was filtered and the chloride ion in the filtrate was measured. 7 × 10 −3 ml / l of chlorine was detected. This value almost coincided with the calculated value, and chlorine generated by decomposition by this method could be removed.
【００１６】[0016]
【発明の効果】本発明によれば、各種の有害有機物を効
率よく無害化することができる。しかも、本発明の場
合、その無害化は、光触媒を用い、気体状態で実施され
ることから、その処理操作は容易である。According to the present invention, various harmful organic substances can be efficiently detoxified. Moreover, in the case of the present invention, the detoxification is carried out in a gaseous state using a photocatalyst, so that the treatment operation is easy.
【図１】本発明を実施する場合のフローシートの一例を
示す。FIG. 1 shows an example of a flow sheet for implementing the present invention.
１ 反応管 ２ 真空紫外光発生用の光源 ３ 光触媒膜 ４ 有害有機物供給管 ５ 有害有機物を無害化処理して得られる処理物の排出
管DESCRIPTION OF SYMBOLS 1 Reaction tube 2 Light source for vacuum ultraviolet light generation 3 Photocatalytic film 4 Hazardous organic matter supply pipe 5 Discharge pipe of processed material obtained by detoxifying harmful organic matter
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平１−143630（ＪＰ，Ａ) 特開 平１−288321（ＪＰ，Ａ) 特開 平１−159031（ＪＰ，Ａ) 特開 平１−159030（ＪＰ，Ａ) 実開 平２−48129（ＪＰ，Ｕ) ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-1-143630 (JP, A) JP-A-1-288321 (JP, A) JP-A-1-159031 (JP, A) JP-A-1- 159030 (JP, A) Actually open 2-48129 (JP, U)
Claims (3)
物及びハロゲン含有有機化合物から選ばれる有害有機物
の蒸気と酸素を含み、該有害有機物の蒸気濃度が１０
０，０００〜１ｖｏｌｐｐｍである気体混合物を光触媒
と接触させることを特徴とする有害有機物の無害化処理
方法。1. The method according to claim 1, wherein the harmful organic substance contains steam and oxygen under vacuum ultraviolet light irradiation, wherein the harmful organic substance has a vapor concentration of 10%.
A method for detoxifying harmful organic substances, which comprises contacting a gas mixture having a concentration of 000 to 1 volppm with a photocatalyst.
１の方法。2. The method according to claim 1, wherein a photocatalyst film is used as the photocatalyst.
スをアルカリ水溶液又は吸着剤と接触させることを特徴
とする有害有機物の無害化処理方法。3. A method for detoxifying harmful organic substances, which comprises contacting the processing gas obtained by the method according to claim 1 with an aqueous alkali solution or an adsorbent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6059901A JP2928976B2 (en) | 1994-03-03 | 1994-03-03 | Detoxification method of harmful organic substances |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6059901A JP2928976B2 (en) | 1994-03-03 | 1994-03-03 | Detoxification method of harmful organic substances |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07241351A JPH07241351A (en) | 1995-09-19 |
| JP2928976B2 true JP2928976B2 (en) | 1999-08-03 |
Family
ID=13126495
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6059901A Expired - Lifetime JP2928976B2 (en) | 1994-03-03 | 1994-03-03 | Detoxification method of harmful organic substances |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2928976B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102688513B (en) * | 2011-03-24 | 2014-03-12 | 清华大学 | Harmful substance removal device and air purification device adopting harmful substance removal device |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01143630A (en) * | 1987-11-27 | 1989-06-06 | Ebara Res Co Ltd | Method for treating fluorocarbon |
| JPH01159031A (en) * | 1987-12-17 | 1989-06-22 | Matsushita Electric Ind Co Ltd | Deodorization by photocatalyst and deodorizing apparatus |
| JPH01159030A (en) * | 1987-12-17 | 1989-06-22 | Matsushita Electric Ind Co Ltd | Deodorization by photocatalyst and deodorizing apparatus |
| JPH01288321A (en) * | 1988-05-13 | 1989-11-20 | Matsushita Electric Ind Co Ltd | Deodorization by photocatalyst |
| JPH062736Y2 (en) * | 1988-09-30 | 1994-01-26 | ウシオ電機株式会社 | Air purifier |
-
1994
- 1994-03-03 JP JP6059901A patent/JP2928976B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07241351A (en) | 1995-09-19 |
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