JP2001269541A - Photocatalytic treatment device - Google Patents
Photocatalytic treatment deviceInfo
- Publication number
- JP2001269541A JP2001269541A JP2000085341A JP2000085341A JP2001269541A JP 2001269541 A JP2001269541 A JP 2001269541A JP 2000085341 A JP2000085341 A JP 2000085341A JP 2000085341 A JP2000085341 A JP 2000085341A JP 2001269541 A JP2001269541 A JP 2001269541A
- Authority
- JP
- Japan
- Prior art keywords
- honeycomb
- photocatalyst
- processing apparatus
- tio
- transparent material
- 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
- 230000001699 photocatalysis Effects 0.000 title abstract description 6
- 239000011941 photocatalyst Substances 0.000 claims abstract description 62
- 239000012780 transparent material Substances 0.000 claims abstract description 13
- 210000001316 polygonal cell Anatomy 0.000 claims abstract description 4
- 229910010413 TiO 2 Inorganic materials 0.000 claims description 18
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 18
- 210000004027 cell Anatomy 0.000 claims description 9
- 238000001125 extrusion Methods 0.000 claims description 7
- 229910000510 noble metal Inorganic materials 0.000 claims description 6
- 239000011148 porous material Substances 0.000 claims description 6
- 239000010453 quartz Substances 0.000 claims description 2
- 241000264877 Hippospongia communis Species 0.000 description 56
- 239000007789 gas Substances 0.000 description 10
- 238000000034 method Methods 0.000 description 10
- 239000003054 catalyst Substances 0.000 description 9
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 6
- 238000002834 transmittance Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000000843 powder Substances 0.000 description 4
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 3
- 230000003197 catalytic effect Effects 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 238000007598 dipping method Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 230000001590 oxidative effect Effects 0.000 description 3
- 229910052697 platinum Inorganic materials 0.000 description 3
- 239000002243 precursor Substances 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 238000005245 sintering Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- 229910021529 ammonia Inorganic materials 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 102100032566 Carbonic anhydrase-related protein 10 Human genes 0.000 description 1
- 102100033029 Carbonic anhydrase-related protein 11 Human genes 0.000 description 1
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 1
- 101000867836 Homo sapiens Carbonic anhydrase-related protein 10 Proteins 0.000 description 1
- 101000867841 Homo sapiens Carbonic anhydrase-related protein 11 Proteins 0.000 description 1
- 101001075218 Homo sapiens Gastrokine-1 Proteins 0.000 description 1
- LSDPWZHWYPCBBB-UHFFFAOYSA-N Methanethiol Chemical compound SC LSDPWZHWYPCBBB-UHFFFAOYSA-N 0.000 description 1
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 244000052616 bacterial pathogen Species 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 229910002090 carbon oxide Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000004332 deodorization Methods 0.000 description 1
- 150000002013 dioxins Chemical class 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 229940088597 hormone Drugs 0.000 description 1
- 239000005556 hormone Substances 0.000 description 1
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000002165 photosensitisation Effects 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000006479 redox reaction Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 238000004659 sterilization and disinfection Methods 0.000 description 1
- 229910052724 xenon Inorganic materials 0.000 description 1
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 description 1
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】 本発明は光触媒処理装置に
係り、更に詳しくは、光触媒を透明な材料からなるハニ
カムに担持し、光源と組み合わせることによってなる光
触媒処理装置に関する。The present invention relates to a photocatalyst processing apparatus, and more particularly, to a photocatalyst processing apparatus in which a photocatalyst is supported on a honeycomb made of a transparent material and combined with a light source.
【０００２】[0002]
【従来の技術】 従来、空気やその他各種ガスの浄化、
除菌、消臭等に光触媒が広く使用されている。この光触
媒はＴｉＯ2を主成分としたものが知られており、バン
ドギャップエネルギーに相当する波長である、約４００
ｎｍ以下の紫外線の照射で光励起されて電子と正孔の対
を生成し、これらが光触媒に接する各種ガスと酸化還元
反応を起こすことによって浄化することができる。通
常、光触媒を使用する場合、使用条件に適した触媒担体
が用いられ、その触媒担体の表面に光触媒が広く付着処
理され、付着処理された光触媒の表面に紫外線を照射
し、これにより光触媒がその強い酸化作用により、流動
し、対向してくる各種ガスを酸化・分解により浄化す
る。このため、光触媒の表面積が大きく、全表面域に紫
外線を満遍なく照射できるほど触媒担体上の光触媒が無
駄無く強い酸化作用を示すことができる。BACKGROUND ART Conventionally, purification of air and other various gases,
Photocatalysts are widely used for disinfection and deodorization. This photocatalyst is known to contain TiO 2 as a main component, and has a wavelength corresponding to a band gap energy of about 400 nm.
It can be purified by being photo-excited by irradiation of ultraviolet light of nm or less to generate a pair of electrons and holes and causing an oxidation-reduction reaction with various gases in contact with the photocatalyst. Usually, when a photocatalyst is used, a catalyst carrier suitable for the use conditions is used, the photocatalyst is widely adhered to the surface of the catalyst carrier, and the surface of the adhered photocatalyst is irradiated with ultraviolet rays, whereby the photocatalyst is exposed to ultraviolet light. Various gases flowing and facing each other are purified by oxidation and decomposition due to strong oxidizing action. Therefore, the photocatalyst on the catalyst carrier can exhibit a strong oxidizing action without waste so that the surface area of the photocatalyst is large and the entire surface area can be evenly irradiated with ultraviolet rays.
【０００３】 光触媒を担持する光触媒担体の形状には
ハニカム状、シート状等がある。ハニカム状光触媒担体
においては、光照射が触媒面に対してほぼ平行に行われ
るため、触媒表面に照射される光のエネルギーは小さく
なり、効率が悪くなる。一方、シート状光触媒担体は、
単位体積あたりの光照射を受ける光触媒の量が少ないた
め、効果を高めようとすると、装置を大型化しなければ
ならなかった。また、シート状光触媒担体を流体に対し
て垂直に配置すると、圧損が大きくなり、より大きなフ
ァンもしくはポンプを用いなければならないという欠点
を有する。このように、従来から用いられている光触媒
担体は、触媒量、受光エネルギー、圧損に関する問題を
有している。The shape of a photocatalyst carrier that supports a photocatalyst includes a honeycomb shape, a sheet shape, and the like. In the honeycomb-shaped photocatalyst carrier, since the light irradiation is performed substantially parallel to the catalyst surface, the energy of the light applied to the catalyst surface is reduced, and the efficiency is reduced. On the other hand, the sheet-shaped photocatalyst carrier
Since the amount of photocatalyst that receives light irradiation per unit volume is small, the device had to be enlarged in order to increase the effect. Further, when the sheet-shaped photocatalyst carrier is arranged perpendicular to the fluid, there is a disadvantage that the pressure loss becomes large and a larger fan or pump must be used. As described above, the conventionally used photocatalyst carrier has problems regarding the amount of catalyst, light receiving energy, and pressure loss.
【０００４】 また、特開平１−２１９０３２号公報に
おいては、大径の透明石英ガラス管内に小径の透明石英
ガラス管を多数本挿入し、大径の透明石英ガラス管と小
径の透明石英ガラス管相互間の間隙を０．２〜０．８気
圧に減圧しながら、これらの透明石英ガラス管を１７０
０〜１８００℃に加熱・溶融する、ハニカム状透明石英
ガラス管の製造方法が開示されている。In Japanese Patent Application Laid-Open No. Hei 1-219032, a large number of small-diameter transparent quartz glass tubes are inserted into a large-diameter transparent quartz glass tube, and the large-diameter transparent quartz glass tube and the small-diameter transparent quartz glass tube are mutually inserted. While reducing the gap between them to 0.2-0.8 atm, these transparent quartz glass tubes were
A method for manufacturing a honeycomb-shaped transparent quartz glass tube that is heated and melted at 0 to 1800 ° C. is disclosed.
【０００５】 しかしながら、特開平１−２１９０３２
号公報に開示された方法によると壁面が厚く、且つ、ハ
ニカム状透明石英ガラス管の単位体積あたりの表面積が
５ｃｍ2／ｃｍ3未満のものしか製造することができず、
さらには開口部形状が円形に限られる、等の技術的な限
界がある。すなわち、単位体積当りの表面積が小さいた
め、光照射を受ける光触媒の量が少なく、触媒効果を高
めるためには装置を大型化する必要があり、組み込み可
能な各種ガスの浄化、除菌、消臭装置の形状に制約があ
る、といった問題点を有している。However, Japanese Patent Application Laid-Open No. 1-219032
According to the method disclosed in Japanese Patent Laid-Open Publication No. H07-115, the wall surface is thick, and the surface area per unit volume of the honeycomb-shaped transparent quartz glass tube can be manufactured only with less than 5 cm 2 / cm 3 ,
Further, there is a technical limit that the shape of the opening is limited to a circle. In other words, since the surface area per unit volume is small, the amount of photocatalyst that receives light irradiation is small, and it is necessary to increase the size of the device in order to enhance the catalytic effect, and purify, sterilize, and deodorize various gases that can be incorporated. There is a problem that the shape of the device is limited.
【０００６】 一方、特開平１０−３０９４３８号公報
においては、透明な石英ガラスにて一体成形されたハニ
カム構造体に、ＴｉＯ2を主成分とした光触媒をコーテ
ィングした排ガス浄化装置を、自動車に組み込んだ例が
開示されている。しかしながら、該公報においてはハニ
カム構造体が透光性を有することの記載はあるものの、
その製造方法や壁厚などの具体的な構造については何ら
記載されていない。On the other hand, in Japanese Patent Application Laid-Open No. H10-309438, an exhaust gas purifying apparatus in which a honeycomb structure integrally formed of transparent quartz glass is coated with a photocatalyst containing TiO 2 as a main component is incorporated in an automobile. Examples are disclosed. However, although the publication discloses that the honeycomb structure has a light-transmitting property,
There is no description about a specific structure such as a manufacturing method or a wall thickness.
【０００７】[0007]
【発明が解決しようとする課題】 本発明は、このよう
な従来技術の有する問題点に鑑みてなされたものであ
り、その目的とするところは、壁厚が薄く、透明な材料
からなるハニカムを製造すると共に、ハニカム上に光触
媒を担持して処理性能の高い光触媒処理装置を提供する
ことにある。SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, and an object of the present invention is to provide a honeycomb made of a transparent material having a small wall thickness. It is an object of the present invention to provide a photocatalyst processing apparatus having high processing performance by manufacturing and supporting a photocatalyst on a honeycomb.
【０００８】[0008]
【課題を解決するための手段】 本発明によれば、一方
向の平行流路を有するハニカムと、該ハニカムに担持さ
れた光触媒、および光源からなる光触媒処理装置であっ
て、該ハニカムが透明材料からなるとともに、壁厚１ｍ
ｍ以下の多角形のセルから構成されていることを特徴と
する光触媒処理装置が提供される。According to the present invention, there is provided a photocatalyst processing apparatus including a honeycomb having a parallel flow path in one direction, a photocatalyst supported on the honeycomb, and a light source, wherein the honeycomb is formed of a transparent material. And wall thickness 1m
A photocatalyst treatment device is provided, which is constituted by polygonal cells of m or less.
【０００９】 本発明においては、ハニカムを構成する
透明材料が石英であることが好ましく、また、ハニカム
に担持された光触媒の厚さが、３０μｍ以下であること
が好ましい。In the present invention, the transparent material constituting the honeycomb is preferably quartz, and the thickness of the photocatalyst supported on the honeycomb is preferably 30 μm or less.
【００１０】 本発明においては、ハニカムのセルが、
気孔径１０〜３００μｍの気泡を１０〜２００個／ｃｍ
3含有することが好ましく、また、ハニカムが押出成形
により製造されることが好ましい。In the present invention, the honeycomb cells are:
10 to 200 bubbles / cm with a pore diameter of 10 to 300 μm
3 preferably contains, also, it is preferable that the honeycomb is produced by extrusion molding.
【００１１】 さらに本発明においては、光触媒が、貴
金属を含有するＴｉＯ2からなることが好ましい。Further, in the present invention, the photocatalyst is preferably made of TiO 2 containing a noble metal.
【００１２】[0012]
【発明の実施の形態】 以下、本発明を実施形態に基づ
き詳しく説明するが、本発明はこれらの実施形態に限定
されるものではない。BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail based on embodiments, but the present invention is not limited to these embodiments.
【００１３】 本発明では、流路を形成する貫通孔が一
方向に互いに平行であり、透明材料により構成されてい
るハニカムを用いる。ハニカムにはＴｉＯ2を始めとす
る光触媒を担持して処理装置として使用する。このた
め、用いる透明材料は、光触媒を光励起するために必要
なバンドギャップエネルギーに相当する、約４００ｎｍ
以下の紫外線を透過する材料であれば良いが、透明石英
ガラスは近紫外線透過率が大きいために好ましい。ま
た、ここでいう透明とは、外見的に透明であるばかりで
なく、光触媒のバンドギャップエネルギーに相当する波
長光を、壁厚１ｍｍのハニカムに照射した場合に、少な
くとも３０％以上の透過率を示すことが好ましい。In the present invention, a honeycomb is used in which through holes forming a flow path are parallel to each other in one direction and are formed of a transparent material. The honeycomb carries a photocatalyst such as TiO 2 and is used as a processing device. For this reason, the transparent material used has a band gap energy of about 400 nm, which corresponds to the band gap energy required for photoexciting the photocatalyst.
Any material that transmits the following ultraviolet rays may be used, but transparent quartz glass is preferable because of its high near-ultraviolet transmittance. The term “transparent” as used herein means not only transparent in appearance but also a transmittance of at least 30% or more when a light having a wavelength corresponding to the band gap energy of the photocatalyst is applied to a honeycomb having a wall thickness of 1 mm. Preferably.
【００１４】 本発明の光触媒処理装置には、バンドギ
ャップエネルギーに相当する波長成分を含む光源を用い
るが、光触媒として、例えばＴｉＯ2を用いる場合に
は、ブラックライト、水銀灯、キセノンランプ等が利用
できる。また、本発明のハニカムは透明であるために、
光源からの光をハニカムの軸方向に対して垂直に当てる
場合と、平行に当てる場合のいずれの場合に用いてもよ
い。In the photocatalyst processing apparatus of the present invention, a light source containing a wavelength component corresponding to the band gap energy is used. When TiO 2 is used as the photocatalyst, for example, a black light, a mercury lamp, a xenon lamp, or the like can be used. . Further, since the honeycomb of the present invention is transparent,
It may be used in any of the case where the light from the light source is applied perpendicular to the axial direction of the honeycomb and the case where the light is applied in parallel to the honeycomb.
【００１５】 本発明のハニカムに担持する光触媒の厚
さは、３０μｍ以下であることが好ましく、０．１〜１
０μｍであることがさらに好ましい。光触媒の厚さが３
０μｍを超える場合では、光触媒層自体の光透過性が低
下してしまい、ハニカム全体に光照射ができなくなるお
それがあるためである。The thickness of the photocatalyst supported on the honeycomb of the present invention is preferably 30 μm or less, and 0.1 to 1 μm.
More preferably, it is 0 μm. Photocatalyst thickness is 3
If the thickness exceeds 0 μm, the light transmittance of the photocatalyst layer itself is reduced, and the entire honeycomb may not be irradiated with light.
【００１６】 また、ハニカムのセルは、気孔径１０〜
３００μｍの気泡を１０〜２００個／ｃｍ3含有するこ
とが好ましく、５０〜１００個／ｃｍ3であることがさ
らに好ましい。このとき、光源から照射された紫外光は
気泡によって散乱分散され、ハニカム全体に、満遍なく
照射することができ、効果的に光触媒効果を示すことが
できる。なお、気泡の気孔径、及び単位体積当りの個数
は、焼成段階において加熱温度、昇温速度、加熱雰囲気
などの条件設定により制御することが可能である。The cells of the honeycomb have a pore size of 10 to 10.
It is preferable to contain 10 to 200 bubbles / cm 3 of 300 μm bubbles, more preferably 50 to 100 bubbles / cm 3 . At this time, the ultraviolet light emitted from the light source is scattered and dispersed by the bubbles, and can be uniformly applied to the entire honeycomb, so that a photocatalytic effect can be effectively exhibited. The pore diameter and the number of bubbles per unit volume can be controlled by setting conditions such as a heating temperature, a heating rate, and a heating atmosphere in the firing step.
【００１７】 本発明のハニカムはその壁厚が１ｍｍ以
下の多角形のセルから構成されている。ここで、ハニカ
ムの壁厚が１ｍｍよりも厚い場合には、本発明の透明材
料からなるハニカムにおいても光透過率が低下し、ハニ
カム全体に光を照射することが困難になる。また、同時
に開口率も低下し、処理対象となる流体の速度が低下す
ることにより、触媒性能が十分に発揮されなくなるとい
った問題を生ずる場合もある。このような問題の生じな
い、壁厚が１ｍｍ以下のハニカムを製造するためには、
押出成形によりハニカム構造を成形することが好まし
い。このとき、セルの壁厚は押出しの際に用いる口金の
スリット寸法を変化させることにより調整可能である。
また、セルの形状は、照射された紫外光を効果的に散乱
させるために多角形であることが好ましく、押出しの際
に用いる口金を選択することで所望の形状とすることが
できる。具体的には三角形、四角形、六角形等の形状か
ら選択することができる。前記の方法により得られたハ
ニカム構造を有する成形体を加熱し、粉末を融着して透
明なハニカムを製造することができる。The honeycomb of the present invention is composed of polygonal cells having a wall thickness of 1 mm or less. Here, when the wall thickness of the honeycomb is larger than 1 mm, the light transmittance of the honeycomb made of the transparent material of the present invention also decreases, and it becomes difficult to irradiate the entire honeycomb with light. At the same time, the aperture ratio also decreases, and the speed of the fluid to be treated decreases, which may cause a problem that the catalyst performance is not sufficiently exhibited. In order to produce a honeycomb having a wall thickness of 1 mm or less without such a problem,
Preferably, the honeycomb structure is formed by extrusion. At this time, the wall thickness of the cell can be adjusted by changing the slit dimensions of the die used for extrusion.
Further, the shape of the cell is preferably a polygon in order to effectively scatter the irradiated ultraviolet light, and a desired shape can be obtained by selecting a die used for extrusion. Specifically, it can be selected from shapes such as a triangle, a quadrangle, and a hexagon. The formed body having a honeycomb structure obtained by the above method is heated, and the powder is fused to produce a transparent honeycomb.
【００１８】 本発明の透明材料からなるハニカムの製
造方法においては、原材料として粒径が０．５〜４０μ
ｍの透明石英ガラスの粉末を使用し、成形助剤及びその
他の添加剤、水等からなる混合原料を、混練機等を用い
て混合して坏土とした後に押出成形を行い、ハニカム構
造を有する成形体を得る。得られた成形体を乾燥後に１
５００〜２０００℃で焼成を行い、冷却して透明材料か
らなるハニカムを得る。In the method for manufacturing a honeycomb made of a transparent material according to the present invention, the raw material has a particle size of 0.5 to 40 μm.
m, using a transparent quartz glass powder, forming aids and other additives, a mixed raw material comprising water, etc., using a kneader or the like to mix and knead the mixture and then extrude to form a honeycomb structure. To obtain a molded article. After drying the obtained molded body, 1
Sintering is performed at 500 to 2000 ° C., and cooling is performed to obtain a honeycomb made of a transparent material.
【００１９】 前記方法により作製したハニカムに担持
する光触媒は、ＴｉＯ2を始めとしてＴｉ2Ｏ3、ＴｉＯ
等の光触媒効果を有する材料のいずれをも用いることが
できるが、そのうち、耐久性の面からＴｉＯ2を用いる
ことが好ましい。また、ＴｉＯ2等の光触媒に、Ｐｔを
始めとする貴金属を混合してもよい。貴金属の混合によ
る効果には、触媒効果の増加を始めとして、光増感作用
の獲得、分解生成物中の炭素酸化物における二酸化炭素
の割合の増加等を挙げることができる。The photocatalyst supported on the honeycomb produced by the above method includes TiO 2 , Ti 2 O 3 , TiO
Any of the materials having a photocatalytic effect such as the above can be used, and among them, TiO 2 is preferably used from the viewpoint of durability. Further, a noble metal such as Pt may be mixed with a photocatalyst such as TiO 2 . The effects obtained by mixing the noble metals include an increase in the catalytic effect, an increase in the photosensitizing effect, an increase in the ratio of carbon dioxide in the carbon oxide in the decomposition product, and the like.
【００２０】 また、貴金属を含有する、ＴｉＯ2を主
成分とする光触媒原料の調製方法としては、ＴｉＯ2ゾ
ルと貴金属の塩を用いる方法、ＴｉとＰｔを分子内に含
む前駆体、及び気孔制御材としてＴｉＯ2ゾルを組み合
わせて用いる方法等を挙げることができるが、より高活
性な光触媒を調整できる点において、後者の方法がより
好ましい。As a method for preparing a photocatalyst raw material containing a noble metal and containing TiO 2 as a main component, a method using a TiO 2 sol and a salt of a noble metal, a precursor containing Ti and Pt in a molecule, and pore control Although a method using a TiO 2 sol in combination can be mentioned as the material, the latter method is more preferable in that a more active photocatalyst can be prepared.
【００２１】 本発明においてハニカム上に光触媒を担
持する方法としては、例えば、ＴｉとＰｔを含む前駆体
とＴｉＯ2ゾルが、ＴｉＯ2換算で約１：１となるように
調製したコート液、又はスラリー中にハニカムをディッ
ピングした後乾燥し、空気中３００〜５００℃で加熱し
てセル表面に固定化する方法が挙げられる。このときの
ディッピング回数により、光触媒層の厚さを調節するこ
とも可能である。In the present invention, a method for supporting a photocatalyst on a honeycomb includes, for example, a coating solution prepared so that a precursor containing Ti and Pt and a TiO 2 sol are about 1: 1 in terms of TiO 2 , or After dipping the honeycomb in the slurry, the honeycomb is dried, and heated at 300 to 500 ° C. in the air to fix the honeycomb on the cell surface. The thickness of the photocatalyst layer can be adjusted by the number of times of dipping at this time.
【００２２】 本発明の光触媒処理装置は、処理対象が
ガス状、液体状のいずれの場合においても効果的に用い
ることができる。処理対象がガス状である場合、アンモ
ニア、硫化水素、メルカプタン、アミン類等の臭気成
分、一酸化炭素、ＮＯｘ等の排ガス成分、ベンゼン、フ
ロン等の揮発性有機成分（ＶＯＣ）等を含む空気を効果
的に分解、処理することができる。処理対象が液体状で
ある場合、環境ホルモン、ダイオキシン、有機塩素成
分、病原菌等を含む水も効果的に処理、無害化すること
ができ、また処理効果の増進を図るために、必要に応じ
て、オゾン、過酸化水素等の活性酸素供給源と併用して
もよい。The photocatalyst processing apparatus of the present invention can be effectively used regardless of whether the processing target is gaseous or liquid. When the processing target is gaseous, air containing odor components such as ammonia, hydrogen sulfide, mercaptan, and amines, exhaust gas components such as carbon monoxide and NOx, and volatile organic components (VOCs) such as benzene and freon is used. It can be effectively decomposed and processed. When the object of treatment is liquid, water containing environmental hormones, dioxins, organochlorine components, pathogenic bacteria, etc. can be effectively treated and detoxified, and as necessary to enhance the treatment effect, , Ozone, hydrogen peroxide and the like.
【００２３】[0023]
【実施例】 以下、本発明の具体的な実施結果を説明す
る。 （実施例１〜７、比較例１〜４）粒径３μｍのシリカ粉
末に、成形助剤と水を添加し、壁厚を変えて押出成形を
行った。乾燥後１８００℃で加熱し、シリカ粉末を融着
して全体が透明な石英ガラスのハニカムを作製した（実
施例１〜７）。作製したハニカムの寸法は、１００ｍｍ
角×長さ１００ｍｍで、セル形状は正方形（９×９ｍ
ｍ）であった。また、壁厚が１ｍｍのセルに対してアナ
ターゼＴｉＯ2のバンドギャップに相当する３９０ｎｍ
の紫外線を照射したところ、いずれも６０％以上の透過
率を示した。また、実施例と同様の方法により、壁厚が
１．５〜５ｍｍである、全体が透明な石英ガラスのハニ
カムを作製した（比較例１〜４）。得られたハニカム
を、ＴｉとＰｔを含む前駆体とＴｉＯ2ゾルが、ＴｉＯ2
換算で１：１となるように調製したコート液にディッピ
ングした後乾燥し、４００℃で加熱してアナターゼ型の
ＴｉＯ2とＰｔからなる光触媒層をハニカムに付与し
た。なお、ディッピング回数を変えることにより、光触
媒層の厚みを表１に示すように変化させた。臭気除去性
能を評価するため、Ｈ2Ｓガスを１００ｐｐｍ含む空気
を１００ｃｍ／ｍｉｎの速度でハニカムに流し、ハニカ
ムの外周部に紫外線光源を設置し、紫外線を照射して排
出ガス中の濃度を測定した。算出したＨ2Ｓの除去率を
表１に示す。EXAMPLES Specific results of the present invention will be described below. (Examples 1 to 7 and Comparative Examples 1 to 4) A molding aid and water were added to silica powder having a particle diameter of 3 µm, and extrusion molding was performed while changing the wall thickness. After drying, the mixture was heated at 1800 ° C., and the silica powder was fused to prepare a transparent quartz glass honeycomb (Examples 1 to 7). The dimensions of the manufactured honeycomb are 100 mm
The cell is square (9 x 9 m)
m). In addition, 390 nm corresponding to the band gap of anatase TiO 2 for a cell having a wall thickness of 1 mm.
Irradiation of the ultraviolet rays showed a transmittance of 60% or more. Further, in the same manner as in the examples, honeycombs made of transparent quartz glass having a wall thickness of 1.5 to 5 mm were manufactured (Comparative Examples 1 to 4). The obtained honeycomb was prepared by mixing a precursor containing Ti and Pt and a TiO 2 sol with TiO 2
The coating solution was dipped in a coating solution prepared so as to have a conversion of 1: 1 and then dried and heated at 400 ° C. to apply a photocatalytic layer composed of anatase type TiO 2 and Pt to the honeycomb. The thickness of the photocatalyst layer was changed as shown in Table 1 by changing the number of times of dipping. In order to evaluate the odor removal performance, air containing 100 ppm of H 2 S gas was flowed through the honeycomb at a speed of 100 cm / min, an ultraviolet light source was installed on the outer periphery of the honeycomb, and ultraviolet light was irradiated to measure the concentration in the exhaust gas. did. Table 1 shows the calculated H 2 S removal rates.
【００２４】[0024]
【表１】 [Table 1]
【００２５】（実施例８〜１３）実施例１〜７と同様の
材料を使用して押出成形を行った後、焼成温度と焼成雰
囲気を変えて、ハニカムの壁に含まれる気孔径１０〜３
００μｍの気泡数を、表２に示した通りに変化させ、壁
厚が０．５ｍｍであるハニカムを作製した。次に、実施
例１〜７と同様の処理により、ハニカム上に光触媒（触
媒層の厚さ、５μｍ）を担持した。臭気除去性能を評価
するため、アンモニアガスを５ｐｐｍ含む空気を１００
ｃｍ／ｍｉｎの速度でハニカムに流し、ハニカムの外周
部に紫外線光源を設置し、紫外線を照射して排出ガス中
のアンモニアガス濃度を測定した。算出したアンモニア
の除去率を表２に示す。(Examples 8 to 13) After extrusion molding was performed using the same materials as in Examples 1 to 7, the sintering temperature and the sintering atmosphere were changed to change the pore diameters of the honeycomb walls 10 to 3 contained in the honeycomb walls.
The number of bubbles of 00 μm was changed as shown in Table 2 to produce a honeycomb having a wall thickness of 0.5 mm. Next, a photocatalyst (thickness of the catalyst layer, 5 μm) was supported on the honeycomb by the same treatment as in Examples 1 to 7. In order to evaluate the odor removal performance, 100 ppm of air containing 5 ppm of ammonia gas was used.
The honeycomb was allowed to flow at a speed of cm / min, an ultraviolet light source was installed on the outer periphery of the honeycomb, and ultraviolet light was irradiated to measure the ammonia gas concentration in the exhaust gas. Table 2 shows the calculated ammonia removal rates.
【００２６】[0026]
【表２】 [Table 2]
【００２７】（考察）表１に見られるように、本発明の
ハニカムは比較例のような壁厚の厚いハニカムに比べ
て、高いＨ2Ｓガス除去性能を示した。また、表２に見
られるように、気泡の数が１０〜２００個／ｃｍ3の範
囲にあるときに除去率の向上が認められ、本発明の優れ
た効果を確認することができた。(Discussion) As shown in Table 1, the honeycomb of the present invention showed higher H 2 S gas removal performance than the honeycomb having a thick wall as in the comparative example. Further, as can be seen from Table 2, when the number of bubbles was in the range of 10 to 200 cells / cm 3 , an improvement in the removal rate was recognized, and the excellent effects of the present invention could be confirmed.
【００２８】[0028]
【発明の効果】 以上説明したように、本発明によれ
ば、透光性を有するハニカムの表面上に光触媒を担持
し、光源と組み合わせることにより、紫外線が効率よく
照射され、高い触媒活性を有する光触媒処理装置を提供
することができる。なお、該ハニカムは壁厚が薄く、適
当数の気泡を含有するために光触媒全体に渡り紫外線が
照射され、光触媒の強酸化作用を無駄無く引き出すこと
ができる光触媒担体である。As described above, according to the present invention, by carrying a photocatalyst on the surface of a light-transmitting honeycomb and combining the photocatalyst with a light source, ultraviolet rays are efficiently irradiated, and the catalyst has high catalytic activity. A photocatalyst processing device can be provided. The honeycomb is a photocatalyst carrier that has a small wall thickness and contains an appropriate number of bubbles, so that the entire photocatalyst is irradiated with ultraviolet rays, and the strong oxidizing action of the photocatalyst can be extracted without waste.
───────────────────────────────────────────────────── 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） Ｂ０１Ｊ 23/63 Ｂ０１Ｄ 53/36 ＺＡＢＪ 35/02 Ｈ 35/04 ３０１ Ｚ １０４Ｚ Ｂ０１Ｊ 23/56 Ａ (72)発明者 川崎 真司 愛知県名古屋市瑞穂区須田町２番56号 日 本碍子株式会社内 (72)発明者 高橋 香里 愛知県名古屋市瑞穂区須田町２番56号 日 本碍子株式会社内 Ｆターム(参考） 4C080 AA07 AA10 BB02 BB04 CC04 HH05 JJ03 KK08 LL02 LL10 MM02 MM07 MM08 NN06 QQ15 4D048 AA03 AA21 AA22 AB03 BA06X BA06Y BA07X BA07Y BA30X BA30Y BA31Y BA32Y BA33Y BA34Y BA35Y BB02 EA01 EA10 4G069 AA03 AA08 AA12 AA14 BA02A BA02B BA04A BA04B BC30A BC50A BC50B BC69A BC75A BC75B CA01 CA02 CA10 CA11 CA17 DA06 EA08 EA19 EB15X EB15Y EC17X EC17Y FA03 FC02 ──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. 7 Identification symbol FI Theme coat ゛ (Reference) B01J 23/63 B01D 53/36 ZABJ 35/02 H 35/04 301 Z 104Z B01J 23/56 A (72) Inventor Shinji Kawasaki 2-56, Suda-cho, Mizuho-ku, Nagoya-shi, Aichi Prefecture Inside Nihon Insulator Co., Ltd. (72) Inventor Kori Takahashi 2-56, Suda-cho, Mizuho-ku, Nagoya City, Aichi Prefecture F-term in Nihon Insulator Co., Ltd. Reference) 4C080 AA07 AA10 BB02 BB04 CC04 HH05 JJ03 KK08 LL02 LL10 MM02 MM07 MM08 NN06 QQ15 4D048 AA03 AA21 AA22 AB03 BA06X BA06Y BA07X BA07Y BA30X BA30Y BA31Y BA32Y BA33A BAAA AB AA AB AA BB BC75A BC75B CA01 CA02 CA10 CA11 CA17 DA06 EA08 EA19 EB15X EB15Y EC17X EC17Y FA03 FC02
Claims (6)
該ハニカムに担持された光触媒、および光源からなる光
触媒処理装置であって、該ハニカムが透明材料からなる
とともに、壁厚１ｍｍ以下の多角形のセルから構成され
ていることを特徴とする光触媒処理装置。1. A honeycomb having a unidirectional parallel flow path,
A photocatalyst processing apparatus comprising a photocatalyst supported on the honeycomb and a light source, wherein the honeycomb is formed of a polygonal cell having a wall thickness of 1 mm or less while being made of a transparent material. .
であることを特徴とする請求項１記載の光触媒処理装
置。2. The photocatalyst processing apparatus according to claim 1, wherein the transparent material forming the honeycomb is quartz.
が、３０μｍ以下であることを特徴とする請求項１記載
の光触媒処理装置。3. The photocatalyst processing apparatus according to claim 1, wherein the thickness of the photocatalyst supported on the honeycomb is 30 μm or less.
０μｍの気泡を１０〜２００個／ｃｍ3含有することを
特徴とする請求項１記載の光触媒処理装置。4. The cell of the honeycomb has a pore size of 10 to 30.
Photocatalyst processing apparatus according to claim 1, wherein the bubbles of 0μm containing 10 to 200 pieces / cm 3.
ることを特徴とする請求項１記載の光触媒処理装置。5. The photocatalyst processing apparatus according to claim 1, wherein the honeycomb is manufactured by extrusion molding.
からなることを特徴とする請求項１記載の光触媒処理装
置。6. The photocatalyst is composed of TiO 2 containing a noble metal.
The photocatalyst processing apparatus according to claim 1, comprising:
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000085341A JP2001269541A (en) | 2000-03-24 | 2000-03-24 | Photocatalytic treatment device |
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|---|---|
| JP2001269541A true JP2001269541A (en) | 2001-10-02 |
Family
ID=18601695
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|---|---|---|---|---|
| JPH1071323A (en) * | 1996-08-30 | 1998-03-17 | Aqueous Res:Kk | Air cleaning filter and air cleaner for car |
| JPH10180044A (en) * | 1996-12-25 | 1998-07-07 | Toyota Motor Corp | Fluid purifier utilizing photocatalyst |
| JPH10202110A (en) * | 1997-01-23 | 1998-08-04 | Tao:Kk | Flexible photocatalyst body |
| JPH10309440A (en) * | 1997-05-12 | 1998-11-24 | Tomoji Sumiya | Purifying apparatus |
| JPH11253818A (en) * | 1998-03-13 | 1999-09-21 | Toyota Motor Corp | Photocatalyst and photocatalytic device |
-
2000
- 2000-03-24 JP JP2000085341A patent/JP2001269541A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1071323A (en) * | 1996-08-30 | 1998-03-17 | Aqueous Res:Kk | Air cleaning filter and air cleaner for car |
| JPH10180044A (en) * | 1996-12-25 | 1998-07-07 | Toyota Motor Corp | Fluid purifier utilizing photocatalyst |
| JPH10202110A (en) * | 1997-01-23 | 1998-08-04 | Tao:Kk | Flexible photocatalyst body |
| JPH10309440A (en) * | 1997-05-12 | 1998-11-24 | Tomoji Sumiya | Purifying apparatus |
| JPH11253818A (en) * | 1998-03-13 | 1999-09-21 | Toyota Motor Corp | Photocatalyst and photocatalytic device |
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