JPH0394814A - Deodorizing method with photocatalyst - Google Patents
Deodorizing method with photocatalystInfo
- Publication number
- JPH0394814A JPH0394814A JP1228520A JP22852089A JPH0394814A JP H0394814 A JPH0394814 A JP H0394814A JP 1228520 A JP1228520 A JP 1228520A JP 22852089 A JP22852089 A JP 22852089A JP H0394814 A JPH0394814 A JP H0394814A
- Authority
- JP
- Japan
- Prior art keywords
- photocatalyst
- gas
- catalyst
- corrugated
- malodor
- 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
- 239000011941 photocatalyst Substances 0.000 title claims abstract description 28
- 238000000034 method Methods 0.000 title claims description 16
- 230000001877 deodorizing effect Effects 0.000 title claims description 10
- 239000004065 semiconductor Substances 0.000 claims abstract description 5
- 239000003054 catalyst Substances 0.000 claims description 20
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 abstract description 17
- 238000000354 decomposition reaction Methods 0.000 abstract description 15
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 abstract description 11
- 239000000919 ceramic Substances 0.000 abstract description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract description 3
- 239000000377 silicon dioxide Substances 0.000 abstract description 2
- 230000001678 irradiating effect Effects 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 19
- 235000019645 odor Nutrition 0.000 description 14
- IKHGUXGNUITLKF-UHFFFAOYSA-N Acetaldehyde Chemical compound CC=O IKHGUXGNUITLKF-UHFFFAOYSA-N 0.000 description 12
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 5
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 4
- WQOXQRCZOLPYPM-UHFFFAOYSA-N dimethyl disulfide Chemical compound CSSC WQOXQRCZOLPYPM-UHFFFAOYSA-N 0.000 description 4
- 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 4
- 230000001699 photocatalysis Effects 0.000 description 4
- 229910001930 tungsten oxide Inorganic materials 0.000 description 4
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- 230000002070 germicidal effect Effects 0.000 description 3
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- SIKJAQJRHWYJAI-UHFFFAOYSA-N Indole Chemical compound C1=CC=C2NC=CC2=C1 SIKJAQJRHWYJAI-UHFFFAOYSA-N 0.000 description 2
- 241000208125 Nicotiana Species 0.000 description 2
- 235000002637 Nicotiana tabacum Nutrition 0.000 description 2
- 150000001299 aldehydes Chemical class 0.000 description 2
- 238000010411 cooking Methods 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229920001971 elastomer Polymers 0.000 description 2
- 235000013305 food Nutrition 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- ZFRKQXVRDFCRJG-UHFFFAOYSA-N skatole Chemical compound C1=CC=C2C(C)=CNC2=C1 ZFRKQXVRDFCRJG-UHFFFAOYSA-N 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 1
- 208000035985 Body Odor Diseases 0.000 description 1
- 241000499489 Castor canadensis Species 0.000 description 1
- 241000723438 Cercidiphyllum japonicum Species 0.000 description 1
- QMMFVYPAHWMCMS-UHFFFAOYSA-N Dimethyl sulfide Chemical compound CSC QMMFVYPAHWMCMS-UHFFFAOYSA-N 0.000 description 1
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 1
- 235000011779 Menyanthes trifoliata Nutrition 0.000 description 1
- 241001465754 Metazoa Species 0.000 description 1
- 101100227721 Rattus norvegicus Frk gene Proteins 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 229910021536 Zeolite Inorganic materials 0.000 description 1
- IKHGUXGNUITLKF-XPULMUKRSA-N acetaldehyde Chemical compound [14CH]([14CH3])=O IKHGUXGNUITLKF-XPULMUKRSA-N 0.000 description 1
- 239000003463 adsorbent Substances 0.000 description 1
- 239000002386 air freshener Substances 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 150000001491 aromatic compounds Chemical class 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 238000004587 chromatography analysis Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000004332 deodorization Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 235000014113 dietary fatty acids Nutrition 0.000 description 1
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000000194 fatty acid Substances 0.000 description 1
- 229930195729 fatty acid Natural products 0.000 description 1
- 150000004665 fatty acids Chemical class 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 238000004817 gas chromatography Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- PZOUSPYUWWUPPK-UHFFFAOYSA-N indole Natural products CC1=CC=CC2=C1C=CN2 PZOUSPYUWWUPPK-UHFFFAOYSA-N 0.000 description 1
- RKJUIXBNRJVNHR-UHFFFAOYSA-N indolenine Natural products C1=CC=C2CC=NC2=C1 RKJUIXBNRJVNHR-UHFFFAOYSA-N 0.000 description 1
- 239000013067 intermediate product Substances 0.000 description 1
- 150000002576 ketones Chemical class 0.000 description 1
- 230000000873 masking effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 description 1
- 229910017464 nitrogen compound Inorganic materials 0.000 description 1
- 150000002830 nitrogen compounds Chemical class 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 229940074386 skatole Drugs 0.000 description 1
- 150000003464 sulfur compounds Chemical class 0.000 description 1
- 239000010457 zeolite Substances 0.000 description 1
Landscapes
- Treating Waste Gases (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
- Catalysts (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、家庭やオフィス内の悪臭（調理臭・食品臭・
たばこ臭・体臭・ペットおよびトイレの臭いなど）の脱
臭のため用いられている光触媒による脱臭方法に関する
ものである。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention is useful for eliminating bad odors (cooking odors, food odors, etc.) in homes and offices.
This invention relates to a deodorizing method using a photocatalyst, which is used to deodorize tobacco odors, body odors, pet and toilet odors, etc.
従来の技術
家庭やオフィス内で発生する悪臭（調理臭・食品臭・た
ばこ臭・ベットおよびトイレ臭など）の成分は、窒素化
合物（アンモニア・アミン類・インドール・スカトール
など）、硫黄化合物（硫化水素・メチルメルカブタン・
硫化メチル・二硫化メチル・二硫化ジメチル等）、アル
デヒド類（ホルムアルデヒド・アセトアルデヒドなど〉
、ケトン類（アセトンなど）、アルコール類（メタノー
ル・エタノールなど）、脂肪酸および芳香族化合物など
、多種多様である。Conventional technology The components of bad odors (cooking odor, food odor, tobacco odor, bed and toilet odor, etc.) that occur in homes and offices are nitrogen compounds (ammonia, amines, indole, skatole, etc.) and sulfur compounds (hydrogen sulfide).・Methylmercabutane・
methyl sulfide, methyl disulfide, dimethyl disulfide, etc.), aldehydes (formaldehyde, acetaldehyde, etc.)
, ketones (acetone, etc.), alcohols (methanol, ethanol, etc.), fatty acids, and aromatic compounds.
従来、このような悪臭を脱臭する方法として、悪臭物質
と薬剤とを科学反応させる方法、芳香剤で悪臭物質をマ
スキングする方法、活性炭やゼオライトなどで悪臭物質
を吸着する方法および、これらの方法を組み合わせて用
いる方法があった。Conventionally, methods for deodorizing such bad odors include a method of causing a chemical reaction between a malodorous substance and a drug, a method of masking the malodorous substance with an air freshener, a method of adsorbing the malodorous substance with activated carbon or zeolite, etc. There are ways to use them in combination.
しかし、これらの方法は脱臭能力が低下したり材料を使
い切ったりすると新しいものと交換する必要があった。However, with these methods, when the deodorizing ability deteriorates or the material is used up, it is necessary to replace it with a new one.
特に、脱臭性能が尽きても外観的に変化のない吸着剤や
脱臭剤では、脱臭性能の低下を使用者が感じたときに交
換の時期に達したとして交換するものであったが、いず
れにしてもこの交換作業は煩わしいものであった。In particular, with respect to adsorbents and deodorizers that do not change in appearance even when their deodorizing performance is exhausted, users would replace them when they felt that their deodorizing performance had deteriorated, indicating that it was time to replace them. However, this replacement work was troublesome.
そこで従来から光触媒作用を使用して脱臭しようという
試みがなされている。これは酸化チタン等の半導体に紫
外線を照射し、これによって励起された半導体を利用し
て有機物を酸化分解するもので、活性炭では脱臭しにく
いアルデヒド類を初めとしてあらゆる悪奥の分解に利用
されている。Therefore, attempts have been made to deodorize using photocatalytic action. This method irradiates semiconductors such as titanium oxide with ultraviolet rays, and uses the semiconductors excited by this to oxidize and decompose organic substances.It is used to decompose all kinds of evil substances, including aldehydes, which are difficult to deodorize with activated carbon. There is.
発明が解決しよ・うとする課題
前記した光触媒の性能を決定づける要因として、紫外線
強度・触媒量・ガスと触媒の接触効串などがある。そこ
で触媒量を増したり、悪臭と触媒との接触効甲を上げる
目的で案内フィンを設ζ』ることか行われても′１る。Problems to be Solved by the Invention Factors that determine the performance of the photocatalyst described above include the intensity of ultraviolet rays, the amount of catalyst, and the contact effect between gas and catalyst. Therefore, the amount of catalyst may be increased, or guide fins may be installed in order to increase the effectiveness of contact between the foul odor and the catalyst.
しかしこのような従来の方法は，案内フィンによって紫
外線が遮られ、紫外線の弱い所や影の所ができ、返一）
で反応が進上なかー）たり、逆に奥いのある中間生成物
が生じ、脱臭速度を１４１めることが困難であるという
課題を存ずるものであった。However, with this conventional method, the guide fins block the ultraviolet rays, creating areas where the ultraviolet rays are weak or in shadows.
The problem is that the reaction does not progress or, conversely, deep intermediate products are produced, making it difficult to increase the deodorization rate.
本発明は、前記従来の；１！題を解決するちのであって
、光触媒作用による悪臭の分解反応を効率的に進ませる
ここができる光触媒による脱臭方法キ提供することを目
的と゛４るちのである。The present invention improves the above-mentioned conventional features; 1! The purpose of this invention is to provide a photocatalytic deodorizing method that can efficiently proceed with the photocatalytic decomposition reaction of malodors.
課題を解決するためのＦ段
Ａｉｌ記目的を達成するために、本発明は、半導体を担
持した波板状の触媒と獣臭を含む気体のａ在下で、．前
記触媒に紫外線を照射する光触媒１、よる脱臭方法とす
るものである，，
作 用
触媒の形状を波板状にし７たことで、触媒表［む１で乱
流が起こりガスとの接触効率があがるうえ、狭い空間で
あっても紫外線の当たる触媒量が増え、かつ紫外線が照
射される触媒量を増加させる、二，Ｌ′ができる。In order to achieve the object described in step F for solving the problems, the present invention provides a process in which a corrugated plate-shaped catalyst supporting a semiconductor and a gas containing animal odor are present. This is a deodorizing method using a photocatalyst 1 in which the catalyst is irradiated with ultraviolet rays.By making the shape of the catalyst into a corrugated plate, turbulent flow occurs on the catalyst surface, which increases the contact efficiency with the gas. In addition, the amount of catalyst exposed to ultraviolet rays increases even in a narrow space, and the amount of catalyst irradiated with ultraviolet rays increases.
実施例
以下、第１図・第２図・第３図を用いて本発明の実施例
について説明する。Embodiments Hereinafter, embodiments of the present invention will be described using FIGS. 1, 2, and 3.
第１図は、酸化チタンを川持した波仮状の光触媒の斜視
図である。この構成は、厚さ０． ５ｍｍの−ｉ′ルミ
ヲーシリ力質のセラミックベーバを、波の高さ４ｍｍ、
ピッチ約７１に成型し、ヂタ！．〆ゾルを含浸し，、乾
燥した後、温度４００℃〜７０ｏ℃で熱処理して酸化チ
タンを担持させたものである。なお本実施例においては
、酸化ヂタンの担持量は杓４００ｇ／ｄとした。第２図
は、尤触媒反応のｒ）ンバスでの分解率を測定する流通
式測定装置を示し゛ｒいる，、２はスデンレスで構成し
た反３： Ｈで、底面に幅３０． ５＋＋＋ｍ、長さ１
２０ｔｌＩｍの光触媒２ａ４・セットし、この対面には
石英板の窓２ｋ）を設｛Ｊている。窓２１）の真Ｉ二に
は紫外線月３を設けている。２ｃ・２ｄは邪魔板であっ
て、共にＦ方に５ｍｍの隙間をイｆしてし１る。４は悪
臭ガスの入ったボンへ、５は空俄の入ったボンベである
．，６ａ・６ｂはそれぞれボ〉へから吐出されるガスの
ＪＥ力４一調節４″るレギュレータ、７ａ・７ｈは流噴
調節器、８は２種類のガスを均一にず昆合するための混
合器である。FIG. 1 is a perspective view of a wave-shaped photocatalyst in which titanium oxide is suspended. This configuration has a thickness of 0. A 5 mm -i'lumiwosiri ceramic beaver with a wave height of 4 mm,
Molded to a pitch of about 71, it looks great! ．． After being impregnated with a final sol and dried, it is heat-treated at a temperature of 400°C to 70°C to support titanium oxide. In this example, the amount of supported titane oxide was 400 g/d. Figure 2 shows a flow measuring device for measuring the decomposition rate in a catalytic reaction bath. 5+++m, length 1
A photocatalyst 2a4 of 20tlIm was set, and a quartz plate window 2k) was installed on the opposite side. An ultraviolet light moon 3 is provided at the center of the window 21). 2c and 2d are baffle plates, and both have a gap of 5 mm in the F direction. 4 is a cylinder containing foul-smelling gas, and 5 is an empty cylinder. , 6a and 6b are regulators that adjust the JE force of the gas discharged from the bottom, 7a and 7h are flow jet regulators, and 8 is a mixer for mixing two types of gas without uniformity. It is a vessel.
９は、バイパス側と反応側を切り替える玉方コック、１
０はそれぞれの要素を結ぶ配管で、ガラく・フッソ樹脂
・ステン１ノ乙等で構成されている．，１１・１２・１
３はガスのサンプリング用のゴム栓である。なお紫外線
灯３には消費電力１０ｂ１の殺菌灯Ｇ Ｉ、 １０を用
い、光触媒２ａ表向の紫外線強度が３．０ｍＷ （波長
２５０ｎｍにおいて）になるようにセットし，た。また
ガスのトータル流量は２ｅ．／’ ｔｎ ｉ ｎになる
ように流量調節器７ａ・７ｂを調節した。9 is a Tamakata cock that switches between the bypass side and the reaction side; 1
0 is the piping that connects each element, and is made of glass, fluorine resin, stainless steel, etc. , 11・12・1
3 is a rubber stopper for gas sampling. A germicidal lamp GI, 10 with a power consumption of 10b1 was used as the ultraviolet lamp 3, and was set so that the intensity of the ultraviolet light on the surface of the photocatalyst 2a was 3.0 mW (at a wavelength of 250 nm). Also, the total flow rate of gas is 2e. The flow rate regulators 7a and 7b were adjusted so that /' tn i n.
次にこの流通式測定装置の操作方法を説明する。光触媒
２ａを反応器２｛Ｊセットし、三方−１ツク９をバイパ
ス側に開くように１，た後、ボンへ４・５を開け悪鷺ガ
スと空気を出し、流量調節器７；１・７ｂを適当に調節
してしばらくの間放置１−る。ガスの流れが安定した時
点で、ゴム桂↓１よりシリンジでガスをザンブリングし
、ガスク「】マトグラフィで分析し濃度の測定を行う。Next, a method of operating this flow-type measuring device will be explained. After setting the photocatalyst 2a in the reactor 2{J, opening the three-way screw 9 to the bypass side, open the holes 4 and 5 to the bong to let out the Akasagi gas and air, and then the flow rate regulator 7; Adjust 7b appropriately and leave it for a while. Once the gas flow has stabilized, samble the gas with a syringe from Gomu Katsura ↓1, analyze it with Gask ``] matography, and measure the concentration.
肖び流量調節器７ａ・７１）を調節して、混合ガスが設
定流量・設定濃度に安定した段階で、紫外線灯３を点灯
し光触媒２ａに５分間紫外線を照射する。次に、三方コ
ック９を反応側に開くように切り替えて５分間放置１る
。その後人［］のゴム栓１２、出〔Ｊのゴム栓１３，よ
りそれぞれシリンジでガ７，発り・ンプリングし、ガス
夕日マトグラフィで濃度分析を１０分間隔で１２０分間
行う。この人１」・出１−１のガス濃度を次式に代入し
て、光触媒２ａによる悪臭ガスの分解率ｍを求める。When the mixed gas stabilizes at the set flow rate and set concentration by adjusting the flow rate regulators 7a and 71), the ultraviolet lamp 3 is turned on and the photocatalyst 2a is irradiated with ultraviolet light for 5 minutes. Next, switch the three-way cock 9 to open to the reaction side and leave it for 5 minutes. Thereafter, the rubber stoppers 12 and 13 are injected and compressed using syringes, respectively, and concentration analysis is performed using gas sunset chromatography at 10-minute intervals for 120 minutes. By substituting the gas concentration of "This person 1" and output 1-1 into the following equation, the decomposition rate m of malodorous gas by the photocatalyst 2a is determined.
ｍ＝ （１−ｂ／ａ）ＸＩＯＯ
但し，ｍ；分解率（％〉
ａ：入口悪臭ガス濃度
ｂ＝出口悪臭ガス濃度
なおこの分解率は、各時間の分解率が安定した時点での
平均分解率である。m = (1-b/a) rate.
以下に、本実験例の波板状の光触媒と従来の平板状の光
触媒について分解率を比較測定した結果を示す。なお比
較のために用いた平板状の光触媒は、厚さ０．５ｍｍの
アルミナーシリカ質のセラミックペーパーにチタニアゾ
ルを含浸した後、乾燥後約４００℃〜７００℃で熱処理
して、酸化チタンを約３００ｇ／Ｊ担持させたものであ
る。悪臭ガスとしては、１５ｐｐｍのアセトアルデヒド
を使用した。この測定結果を第１表に示す。Below, the results of comparing the decomposition rates of the corrugated photocatalyst of this experimental example and the conventional flat photocatalyst are shown. The flat photocatalyst used for comparison was made by impregnating a 0.5 mm thick alumina-silica ceramic paper with titania sol, drying it and then heat-treating it at about 400°C to 700°C to remove titanium oxide. 300g/J was loaded. As the malodorous gas, 15 ppm of acetaldehyde was used. The measurement results are shown in Table 1.
第 １ 表
この結果から明らかなように、波板状の光触媒を使用す
ることによって、分解率を３割以上向上させることがで
きる。Table 1 As is clear from the results, by using the corrugated photocatalyst, the decomposition rate can be improved by 30% or more.
次に第二の実験例について説明する。本実験例では、前
記第一の実験例で使用した酸化チタンの触媒に加えて、
酸化チタンと酸化タングステンの混合触媒を使用した。Next, a second experimental example will be explained. In this experimental example, in addition to the titanium oxide catalyst used in the first experimental example,
A mixed catalyst of titanium oxide and tungsten oxide was used.
この混合触媒は、厚さ０．５ｍｍのアルミナーシリカ質
のセラミックペーパーにチタニアゾルを含浸し乾燥した
後、約４００℃〜７００℃で熱処理し、その後メタタン
グステン酸アンモニウムを含浸して再び熱処理する等の
方法で、酸化チタンと酸化タングステンを担持させたも
のである。この場合、酸化チタンと酸化タングステンの
比率は重量比で８５＋１５であり、担持量はトータルで
約６００ｇ／Ｊとした。なお本実施例においては、波の
高さは２ｍｍ、ピッチは３Ｉとした。比較のために用い
た従来品は前記第一の実験例と同様、平板状とした。ま
た、使用した触媒の大きさは、いずれも直径６３ｍｍと
した。 以上の条件で以下の手順で実験を行った。先ず
酸化チタンと酸化タングステンの混合触媒を、第３図に
示すステンレスの台２７に載せ、内容積３６ｅのアルミ
ニウム製の反応器２２の中に、紫外線灯２３からの距離
が１００ｍｍとなるように調節する。紫外線灯２３には
ＩＯＷの殺菌灯を用い、このときの波長２５０ｎｍでの
紫外線強度は１．．６ｂｅＷ／ｃＪであった。この反応
器２２の中に、アセトアルデヒドの飽和ガスをサンプリ
ングロ２４より注入し、ファン２５で撹拌して濃度を均
一にし、ガスクロマトグラフのピーク面積が１００００
０（アセトアルデヒド濃度で７０ｐｐｍに相当する）を
示した瞬間から３０分間の平均での１分間当たりの分解
率を触媒の分解性能とした。次に酸化チタン触媒につい
て、硫化水素の分解性能を測定した。この場合、紫外線
灯２３としては１００Ｗの殺菌灯を用い、触媒２６はこ
の紫外線灯２３から１００１の距離に置いた。このとき
波長２５０ｎｍでの紫外線強度は１７ｍＷ／ｃｎｆであ
った。硫化水素の初期濃度は７０ｐｐｍよりやや高めに
調整し、前紀アセチアルデヒドの場合と同様にしてガス
クロマトグラフィを使用して分解性能を求めた。硫化水
素の分解性能は、濃度７０ｐｐｍを示した瞬間から３０
分間の平均での１分間当たりの分解率とした。This mixed catalyst is prepared by impregnating an alumina-siliceous ceramic paper with a thickness of 0.5 mm with titania sol, drying it, heat-treating it at about 400°C to 700°C, and then impregnating it with ammonium metatungstate and heat-treating it again. This method supports titanium oxide and tungsten oxide. In this case, the ratio of titanium oxide to tungsten oxide was 85+15 by weight, and the total amount supported was about 600 g/J. In this example, the wave height was 2 mm and the pitch was 3I. The conventional product used for comparison was in the form of a flat plate, similar to the first experimental example. Further, the size of the catalyst used was 63 mm in diameter in all cases. An experiment was conducted under the above conditions and according to the following procedure. First, a mixed catalyst of titanium oxide and tungsten oxide was placed on a stainless steel stand 27 shown in FIG. do. An IOW germicidal lamp is used as the ultraviolet lamp 23, and the ultraviolet intensity at a wavelength of 250 nm is 1. ．． It was 6beW/cJ. Acetaldehyde saturated gas is injected into the reactor 22 from the sampling chamber 24 and stirred with a fan 25 to make the concentration uniform, and the peak area of the gas chromatograph is 10,000.
The average decomposition rate per minute for 30 minutes from the moment when the acetaldehyde concentration showed 0 (corresponding to 70 ppm in acetaldehyde concentration) was defined as the decomposition performance of the catalyst. Next, the hydrogen sulfide decomposition performance of the titanium oxide catalyst was measured. In this case, a 100W germicidal lamp was used as the ultraviolet lamp 23, and the catalyst 26 was placed at a distance of 1001 from the ultraviolet lamp 23. At this time, the intensity of ultraviolet rays at a wavelength of 250 nm was 17 mW/cnf. The initial concentration of hydrogen sulfide was adjusted to be slightly higher than 70 ppm, and the decomposition performance was determined using gas chromatography in the same manner as in the case of acetialdehyde. The decomposition performance of hydrogen sulfide is 30% from the moment the concentration shows 70ppm.
The decomposition rate was expressed as the average decomposition rate per minute.
この結果を第２表に示す。The results are shown in Table 2.
第 ２ 表
注：ＡＡ アセトアルデヒド
このようにアセトアルデヒドの分解性能においては３割
以上、硫化水素においては５ｖＪ以上波板状の方が効率
が良い。Table 2 Note: AA Acetaldehyde As shown above, the corrugated plate shape is more efficient in decomposing acetaldehyde by 30% or more, and more than 5 vJ in hydrogen sulfide.
発明の効果
以上の説明から明らかなように本発明の光触媒による脱
臭方法は、光触媒を波板状とすることにより、その面積
を増すことができ同時に悪臭気体との接触効率を高める
ことができ、光触媒作用による悪臭の分解反応を効率よ
・く進ませることができ、極めて有効な発明である。Effects of the Invention As is clear from the above explanation, in the deodorizing method using a photocatalyst of the present invention, by making the photocatalyst into a corrugated plate shape, the area of the photocatalyst can be increased, and at the same time, the efficiency of contact with malodorous gases can be increased. It is an extremely effective invention that allows the decomposition reaction of bad odors to proceed efficiently through photocatalytic action.
第１図は、本発明の光触媒の実施例を示す斜視図、１２
図は同分解性能を測定する流通式試験装置の概略図、第
３図は同バッチ式試験装置の断１０１図である。
１・２ａ・２Ｇ・・・光触媒、３・２３・・・紫外線灯
。FIG. 1 is a perspective view showing an example of the photocatalyst of the present invention, 12
The figure is a schematic diagram of a flow-type test device for measuring the decomposition performance, and FIG. 3 is a cross-sectional view of the same batch-type test device. 1.2a.2G...photocatalyst, 3.23...ultraviolet lamp.
Claims (1)
下で、前記触媒に紫外線を照射する光触媒による脱臭方
法。A deodorizing method using a photocatalyst, in which the catalyst is irradiated with ultraviolet rays in the presence of a corrugated catalyst supporting a semiconductor and a gas containing a bad odor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1228520A JPH07114925B2 (en) | 1989-09-04 | 1989-09-04 | Photocatalytic deodorization method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1228520A JPH07114925B2 (en) | 1989-09-04 | 1989-09-04 | Photocatalytic deodorization method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0394814A true JPH0394814A (en) | 1991-04-19 |
| JPH07114925B2 JPH07114925B2 (en) | 1995-12-13 |
Family
ID=16877712
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1228520A Expired - Lifetime JPH07114925B2 (en) | 1989-09-04 | 1989-09-04 | Photocatalytic deodorization method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07114925B2 (en) |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0630679A1 (en) * | 1992-11-10 | 1994-12-28 | Toto Ltd. | Air treating method using photocatalyst under interior illumination |
| WO1995028220A1 (en) * | 1994-04-18 | 1995-10-26 | Attia Yosry A | Aerogel materials and system for the capture and separation of gases and vapors with aerogel materials |
| WO1996037281A1 (en) * | 1995-05-26 | 1996-11-28 | Minnesota Mining And Manufacturing Company | Bench top uv-activated odor filtration device |
| US5593737A (en) * | 1995-05-23 | 1997-01-14 | United Technologies Corporation | Photocatalytic semiconductor coating process |
| US5616532A (en) * | 1990-12-14 | 1997-04-01 | E. Heller & Company | Photocatalyst-binder compositions |
| US5790934A (en) * | 1996-10-25 | 1998-08-04 | E. Heller & Company | Apparatus for photocatalytic fluid purification |
| WO1998041482A1 (en) * | 1997-03-14 | 1998-09-24 | Ppg Industries Ohio, Inc. | Photocatalytically-activated self-cleaning appliances |
| US5849200A (en) * | 1993-10-26 | 1998-12-15 | E. Heller & Company | Photocatalyst-binder compositions |
| US5865959A (en) * | 1995-05-23 | 1999-02-02 | United Technologies Corporation | Back-side illuminated organic pollutant removal system |
| US6054227A (en) * | 1997-03-14 | 2000-04-25 | Ppg Industries Ohio, Inc. | Photocatalytically-activated self-cleaning appliances |
| EP0812619B1 (en) * | 1996-06-12 | 2003-11-26 | Eastman Kodak Company | Inorganic transparent photocatalytic composition |
| EP1375444A1 (en) * | 1997-03-14 | 2004-01-02 | PPG Industries Ohio, Inc. | Photocatalytically-activated self-cleaning appliances |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01159030A (en) * | 1987-12-17 | 1989-06-22 | Matsushita Electric Ind Co Ltd | Deodorization by photocatalyst and deodorizing apparatus |
| JPH01189322A (en) * | 1988-01-22 | 1989-07-28 | Hitachi Ltd | Deodorizing device |
| JPH01189321A (en) * | 1988-01-22 | 1989-07-28 | Hitachi Ltd | Deodorizer for refrigerator |
-
1989
- 1989-09-04 JP JP1228520A patent/JPH07114925B2/en not_active Expired - Lifetime
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01159030A (en) * | 1987-12-17 | 1989-06-22 | Matsushita Electric Ind Co Ltd | Deodorization by photocatalyst and deodorizing apparatus |
| JPH01189322A (en) * | 1988-01-22 | 1989-07-28 | Hitachi Ltd | Deodorizing device |
| JPH01189321A (en) * | 1988-01-22 | 1989-07-28 | Hitachi Ltd | Deodorizer for refrigerator |
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5616532A (en) * | 1990-12-14 | 1997-04-01 | E. Heller & Company | Photocatalyst-binder compositions |
| EP0630679A4 (en) * | 1992-11-10 | 1997-07-16 | Toto Ltd | Air treating method using photocatalyst under interior illumination. |
| EP0630679A1 (en) * | 1992-11-10 | 1994-12-28 | Toto Ltd. | Air treating method using photocatalyst under interior illumination |
| US6093676A (en) * | 1993-10-26 | 2000-07-25 | E. Heller & Company | Photocatalyst-binder compositions |
| US5849200A (en) * | 1993-10-26 | 1998-12-15 | E. Heller & Company | Photocatalyst-binder compositions |
| US5854169A (en) * | 1993-10-26 | 1998-12-29 | E. Heller & Company | Photocatalyst-binder compositions |
| US6080281A (en) * | 1994-04-18 | 2000-06-27 | Attia; Yosry A. | Scrubbing of contaminants from contaminated air streams with aerogel materials with optional photocatalytic destruction |
| WO1995028220A1 (en) * | 1994-04-18 | 1995-10-26 | Attia Yosry A | Aerogel materials and system for the capture and separation of gases and vapors with aerogel materials |
| US5593737A (en) * | 1995-05-23 | 1997-01-14 | United Technologies Corporation | Photocatalytic semiconductor coating process |
| US5865959A (en) * | 1995-05-23 | 1999-02-02 | United Technologies Corporation | Back-side illuminated organic pollutant removal system |
| WO1996037281A1 (en) * | 1995-05-26 | 1996-11-28 | Minnesota Mining And Manufacturing Company | Bench top uv-activated odor filtration device |
| EP0812619B1 (en) * | 1996-06-12 | 2003-11-26 | Eastman Kodak Company | Inorganic transparent photocatalytic composition |
| WO1998017390A3 (en) * | 1996-10-25 | 1998-10-15 | Heller E & Co | Apparatus for photocatalytic fluid purification |
| US5790934A (en) * | 1996-10-25 | 1998-08-04 | E. Heller & Company | Apparatus for photocatalytic fluid purification |
| US6054227A (en) * | 1997-03-14 | 2000-04-25 | Ppg Industries Ohio, Inc. | Photocatalytically-activated self-cleaning appliances |
| WO1998041482A1 (en) * | 1997-03-14 | 1998-09-24 | Ppg Industries Ohio, Inc. | Photocatalytically-activated self-cleaning appliances |
| EP1375444A1 (en) * | 1997-03-14 | 2004-01-02 | PPG Industries Ohio, Inc. | Photocatalytically-activated self-cleaning appliances |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07114925B2 (en) | 1995-12-13 |
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