JPH043247B2 - - Google Patents
Info
- Publication number
- JPH043247B2 JPH043247B2 JP62210245A JP21024587A JPH043247B2 JP H043247 B2 JPH043247 B2 JP H043247B2 JP 62210245 A JP62210245 A JP 62210245A JP 21024587 A JP21024587 A JP 21024587A JP H043247 B2 JPH043247 B2 JP H043247B2
- Authority
- JP
- Japan
- Prior art keywords
- ozone
- catalyst
- decomposition
- containing gas
- ozone decomposition
- 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
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 claims description 55
- 238000000034 method Methods 0.000 claims description 25
- 238000000354 decomposition reaction Methods 0.000 claims description 22
- 239000003054 catalyst Substances 0.000 claims description 13
- 239000007789 gas Substances 0.000 description 11
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 8
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 5
- 239000011572 manganese Substances 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 2
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 2
- 229910004298 SiO 2 Inorganic materials 0.000 description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 238000003421 catalytic decomposition reaction Methods 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- AMWRITDGCCNYAT-UHFFFAOYSA-L hydroxy(oxo)manganese;manganese Chemical compound [Mn].O[Mn]=O.O[Mn]=O AMWRITDGCCNYAT-UHFFFAOYSA-L 0.000 description 2
- NUJOXMJBOLGQSY-UHFFFAOYSA-N manganese dioxide Chemical compound O=[Mn]=O NUJOXMJBOLGQSY-UHFFFAOYSA-N 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000008188 pellet Substances 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000005979 thermal decomposition reaction Methods 0.000 description 2
- 238000004065 wastewater treatment Methods 0.000 description 2
- RZVAJINKPMORJF-UHFFFAOYSA-N Acetaminophen Chemical compound CC(=O)NC1=CC=C(O)C=C1 RZVAJINKPMORJF-UHFFFAOYSA-N 0.000 description 1
- 239000005909 Kieselgur Substances 0.000 description 1
- 229910008341 Si-Zr Inorganic materials 0.000 description 1
- 229910006682 Si—Zr Inorganic materials 0.000 description 1
- 229910004339 Ti-Si Inorganic materials 0.000 description 1
- 229910010413 TiO 2 Inorganic materials 0.000 description 1
- 229910010978 Ti—Si Inorganic materials 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000000440 bentonite Substances 0.000 description 1
- 229910000278 bentonite Inorganic materials 0.000 description 1
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 1
- 239000011218 binary composite Substances 0.000 description 1
- 238000004061 bleaching Methods 0.000 description 1
- 238000004523 catalytic cracking Methods 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 229910052878 cordierite Inorganic materials 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000007791 dehumidification Methods 0.000 description 1
- 238000004332 deodorization Methods 0.000 description 1
- 230000001877 deodorizing effect Effects 0.000 description 1
- JSKIRARMQDRGJZ-UHFFFAOYSA-N dimagnesium dioxido-bis[(1-oxido-3-oxo-2,4,6,8,9-pentaoxa-1,3-disila-5,7-dialuminabicyclo[3.3.1]nonan-7-yl)oxy]silane Chemical compound [Mg++].[Mg++].[O-][Si]([O-])(O[Al]1O[Al]2O[Si](=O)O[Si]([O-])(O1)O2)O[Al]1O[Al]2O[Si](=O)O[Si]([O-])(O1)O2 JSKIRARMQDRGJZ-UHFFFAOYSA-N 0.000 description 1
- KZHJGOXRZJKJNY-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Si]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O KZHJGOXRZJKJNY-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 230000007794 irritation Effects 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052863 mullite Inorganic materials 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000005297 pyrex Substances 0.000 description 1
- 210000002345 respiratory system Anatomy 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- 230000001954 sterilising effect Effects 0.000 description 1
- 238000004659 sterilization and disinfection Methods 0.000 description 1
- 239000005437 stratosphere Substances 0.000 description 1
- 239000011206 ternary composite Substances 0.000 description 1
- PMTRSEDNJGMXLN-UHFFFAOYSA-N titanium zirconium Chemical compound [Ti].[Zr] PMTRSEDNJGMXLN-UHFFFAOYSA-N 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
Landscapes
- Treating Waste Gases (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Description
【発明の詳細な説明】
＜産業上の利用分野＞
本発明はオゾン分解方法、特にガス中に含有さ
れるオゾンを効率よく接触分解する方法に関す
る。DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to an ozone decomposition method, and particularly to a method for efficiently catalytically decomposing ozone contained in gas.
＜従来技術とその問題点＞
オゾンは強い酸化能を有し、分解すると無害な
酸素になるために脱臭、殺菌、漂白または排水中
のCOD減少等の目的でさまざまな分野において、
幅広く利用されている。しかし、処理に利用され
たオゾンは一部未反応のまま大気中に放出される
ために、光化学スモツグ等の二次公害を発生させ
る恐れがある。また、航空機が成層圏を飛行する
場合機内にオゾンを含む空気が導入されるため
に、乗客や搭乗員に悪影響を及ぼす危険性があ
る。<Prior art and its problems> Ozone has strong oxidizing ability and becomes harmless oxygen when decomposed, so it is used in various fields for purposes such as deodorization, sterilization, bleaching, and reducing COD in wastewater.
Widely used. However, some of the ozone used in the treatment is released into the atmosphere unreacted, which poses the risk of causing secondary pollution such as photochemical smog. Furthermore, when an aircraft flies in the stratosphere, air containing ozone is introduced into the cabin, which poses a risk of adversely affecting passengers and crew.
さらに、最近、各種の高電圧発生装置を組み込
んだ機器、例えば乾式の複写機等からのオゾンの
発生が問題となつており、これ等の機器は主に室
内に置かれるためにオゾンの発生量は微量であつ
ても室内が汚染される。 Furthermore, recently, ozone generation from devices that incorporate various high-voltage generators, such as dry-type copying machines, has become a problem, and since these devices are mainly placed indoors, the amount of ozone generated is low. Even a small amount of this can contaminate the room.
オゾンの臭いは1ppm以下の濃度で感知でき、
2ppm以上の濃度では呼吸器系に刺激を引き起こ
し、人体に有害となるために、各種の発生源から
排出されるオゾンを除去し、無害化する必要があ
る。 Ozone odor can be detected at concentrations below 1 ppm.
Concentrations of 2 ppm or higher cause irritation to the respiratory system and are harmful to the human body, so it is necessary to remove ozone emitted from various sources and render it harmless.
従来、用いられてきた廃オゾンの処理技術とし
ては、活性炭法、薬液洗浄法および熱分解法があ
る。活性炭法は低濃度オゾンの処理に利用されて
いるが、オゾン分解の進行に伴つて、活性炭が消
耗するために補充する必要があり、また高濃度の
オゾンを処理する場合は反応熱により活性炭自身
が発火、燃焼する危険性があるので取り扱い上問
題がある。 Conventionally used waste ozone treatment techniques include an activated carbon method, a chemical cleaning method, and a thermal decomposition method. The activated carbon method is used to treat low-concentration ozone, but as ozone decomposition progresses, the activated carbon is consumed and needs to be replenished, and when treating high-concentration ozone, the activated carbon itself is destroyed by the heat of reaction. There is a danger of ignition and combustion, which poses a problem in handling.
薬液洗浄法は還元性物質の水溶液で廃オゾンを
洗浄するために処理コストが高く、廃水処理の問
題が生じる。 In the chemical cleaning method, waste ozone is cleaned with an aqueous solution of a reducing substance, so the treatment cost is high and problems arise in wastewater treatment.
熱分解法は分解効率を上げるためには300℃以
上の加熱が必要であり、多量の排ガスを処理する
ためには加熱費用がかかり、処理コストが高くな
るなどの欠点がある。 The thermal decomposition method requires heating to 300°C or higher in order to increase decomposition efficiency, and has drawbacks such as heating costs required to process a large amount of exhaust gas, which increases processing costs.
一方、近年廃オゾン処理方法として触媒分解法
が研究されており、この方法は発火、爆発の危険
性がなく、廃水処理も不要であり、低コストでオ
ゾンを分解除去できるために有利な方法とされて
いる。しかしながら従来検討されている触媒分解
法では、触媒活性を十分に高めるための加熱が必
要であつて処理コスト上の問題を有すると共に、
オゾン分解効率を高く且つ長時間維持し得る迄に
は至つていない。 On the other hand, in recent years, research has been conducted on the catalytic decomposition method as a waste ozone treatment method.This method has no risk of ignition or explosion, does not require wastewater treatment, and can decompose and remove ozone at low cost, making it an advantageous method. has been done. However, the catalytic decomposition methods that have been studied so far require heating to sufficiently increase the catalytic activity, which poses problems in terms of processing cost.
It has not yet been possible to maintain high ozone decomposition efficiency for a long period of time.
＜発明の目的＞
本発明の目的は、オゾン含有ガスのオゾンを接
触的に分解除去するにあたり、最良の分解効率を
発揮すると考え得る触媒を選定すると共に、ガス
中の水分をあらかじめ取り除くことにより、オゾ
ン分解効率を高く維持せしめてなる脱臭方法を提
供することにある。<Object of the invention> The object of the invention is to select a catalyst that is considered to exhibit the best decomposition efficiency when catalytically decomposing and removing ozone from an ozone-containing gas, and to remove moisture in the gas in advance. To provide a deodorizing method that maintains high ozone decomposition efficiency.
＜問題点を解決するための手段＞
本発明者らは、上記目的に沿つて鋭意研究した
結果、オゾン含有ガス中のオゾンを接触的に分解
除去せしめてなるオゾン分解方法において、触媒
としてMnを含有するものを選定すると共に、あ
らかじめオゾン含有ガスの除湿を行つたのち、オ
ゾンを接触分解する方法が、事実上効率の良いオ
ゾン分解効果を奏することを見い出した。<Means for Solving the Problems> As a result of intensive research in line with the above objectives, the present inventors have developed an ozone decomposition method in which ozone in an ozone-containing gas is catalytically decomposed and removed, using Mn as a catalyst. It has been found that a method of catalytically decomposing ozone after selecting the ozone-containing gas and dehumidifying the ozone-containing gas in advance produces a virtually efficient ozone decomposition effect.
＜作用＞
本発明にかかるオゾン分解方法の特徴は、オゾ
ンを接触的に分解除去するに触媒としてMnを含
有するものを選定した点、並びにあらかじめオゾ
ン含有ガスの除湿を行つたのち、オゾンを接触的
に分解除去する点にある。<Function> The ozone decomposition method according to the present invention is characterized by the fact that a catalyst containing Mn is selected for catalytically decomposing and removing ozone, and that the ozone-containing gas is dehumidified in advance and then ozone is catalytically decomposed and removed. The point is that it can be decomposed and removed.
本発明者らは、オゾンの接触分解反応は、酸化
マンガン等のMn含有触媒を用いたときにもつと
も効率良く進行することを見出したが、更に検討
を進めたところ、Mn含有触媒は水分の影響を受
けやすい、つまりオゾン含有ガスの水分含有量が
多くなると、オゾン分解効率が低下するという知
見を得た。 The present inventors found that the catalytic cracking reaction of ozone proceeds more efficiently when using a Mn-containing catalyst such as manganese oxide. We obtained the knowledge that the ozone decomposition efficiency decreases when the moisture content of ozone-containing gas increases.
すなわち、オゾン分解効率を高く維持するため
には、オゾン含有ガスの相対湿度を60％以下、好
ましくは30％以下に除湿せしめることが必要であ
ることを見出したのである。 In other words, it has been found that in order to maintain high ozone decomposition efficiency, it is necessary to dehumidify the ozone-containing gas to a relative humidity of 60% or less, preferably 30% or less.
除湿する方法は特に限定しないが、オゾン含有
ガスの種類、量に応じて選択する必要がある。 The method of dehumidification is not particularly limited, but must be selected depending on the type and amount of ozone-containing gas.
本発明で用いられる触媒はMnを金属として、
または化合物（例えば酸化物）の形で含有するこ
とを必須の要件とするものであり、この要件を満
足する限り、他の要件については一切制限されな
い。例えば上記Mn（化合物である場合を含む）
の他に、全体の60〜99.9重量％の比率でアルミ
ナ、シリカ、シリカアルミナ、ベントナイト、ケ
イソウ土、シリコンカーバイド、チタニア、ジル
コニア、マグネシア、コーデイライト、ムライト
等を併用することもできる。尚これらのうち特に
好ましいのはTi−Si系またはTi−Zr系等の２元
系複合酸化物、Ti−Si−Zr系等の３元系複合酸
化物である。 The catalyst used in the present invention uses Mn as a metal,
or in the form of a compound (for example, an oxide), and as long as this requirement is satisfied, there are no restrictions on other requirements. For example, the above Mn (including when it is a compound)
In addition, alumina, silica, silica alumina, bentonite, diatomaceous earth, silicon carbide, titania, zirconia, magnesia, cordierite, mullite, etc. can also be used together in a proportion of 60 to 99.9% by weight of the total. Among these, particularly preferred are binary composite oxides such as Ti-Si or Ti-Zr, and ternary composite oxides such as Ti-Si-Zr.
分解反応は常温以下の温度でも十分に進行す
る。その他の条件として、空間速度は500〜
50000hr-1（STP）、とくに1000〜30000hr-1（STP）
の範囲が好適である。 The decomposition reaction proceeds satisfactorily even at temperatures below room temperature. Other conditions include space velocity of 500~
50000hr -1 (STP), especially 1000~30000hr -1 (STP)
A range of is suitable.
以下に実施例および比較例を用いて本発明をさ
らに詳細に説明するが、本発明はこれらの実施例
のみに限定されるものではない。 The present invention will be explained in more detail below using Examples and Comparative Examples, but the present invention is not limited to these Examples.
実施例 １
オゾンを10ppm含有する相対湿度100％の空気
を除湿器を通し、相対湿度を30％に低下させた
後、直径3.0mm、長さ3.0mmのペレツト状触媒
（TiO2：SiO2：MnO2＝81：14：５重量比）10.5
c.c.を充填してなる、内径20mmのパイレツクス反応
管に、0.528Nm3／Hrの流速（空間速度
50000Hr-1）で導入し、反応温度２℃におけるオ
ゾン分解率を求めた。Example 1 Air with a relative humidity of 100% containing 10 ppm of ozone was passed through a dehumidifier to reduce the relative humidity to 30%, and then a pellet-shaped catalyst (TiO 2 :SiO 2 : MnO2 = 81:14:5 weight ratio) 10.5
A Pyrex reaction tube with an inner diameter of 20 mm filled with
50000Hr -1 ), and the ozone decomposition rate at a reaction temperature of 2°C was determined.
オゾン分解率は次式により求めた。 The ozone decomposition rate was determined using the following formula.
オゾン分解率（％） ＝（１−触媒層出口オゾン濃度 触媒層入口オゾン濃度）×100 その結果、オゾン分解率は95％であつた。Ozone decomposition rate (%) =(1-catalyst layer outlet ozone concentration Catalyst layer inlet ozone concentration) x 100 As a result, the ozone decomposition rate was 95%.
実施例 ２
ペレツト状触媒の組成をγ−Al2O3：MnO2＝
95.5に変えた他は実施例１と同様に実施した。オ
ゾン分解率は92％であつた。Example 2 The composition of the pellet catalyst was γ-Al 2 O 3 :MnO 2 =
The same procedure as in Example 1 was carried out except that the temperature was changed to 95.5. The ozone decomposition rate was 92%.
実施例 ３
ペレツト状触媒の組成をSiO2：Al2O3：MnO2
＝75：20：５に変えた他は実施例１と同様に実施
した。オゾン分解率は93％であつた。Example 3 The composition of pellet catalyst was SiO 2 :Al 2 O 3 :MnO 2
The same procedure as in Example 1 was carried out except that the ratio was changed to 75:20:5. The ozone decomposition rate was 93%.
比較例 １
オゾンを10ppm含有する相対湿度100％の空気
を除湿器に通さずに反応管に導入したということ
を除いて、実施例１と同様の方法でオゾン分解率
を求めた。Comparative Example 1 The ozone decomposition rate was determined in the same manner as in Example 1, except that air containing 10 ppm of ozone and having a relative humidity of 100% was introduced into the reaction tube without passing through a dehumidifier.
その結果、オゾン分解率は69％であつた。 As a result, the ozone decomposition rate was 69%.
実施例および比較例の結果より本発明のオゾン
分解方法は優れた方法であることがわかる。 The results of Examples and Comparative Examples show that the ozone decomposition method of the present invention is an excellent method.
Claims (1)
に分解除去するにあたり、まずオゾン含有ガスの
除湿を行い、次いで触媒としてMn含有触媒を用
い常温以下の温度でオゾンを接触的に分解除去す
ることを特徴とするオゾン分解方法。1. To catalytically decompose and remove ozone in ozone-containing gas on a catalyst, first dehumidify the ozone-containing gas, and then catalytically decompose and remove ozone at a temperature below room temperature using a Mn-containing catalyst as a catalyst. An ozone decomposition method characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62210245A JPS6456123A (en) | 1987-08-26 | 1987-08-26 | Method for decomposing ozone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62210245A JPS6456123A (en) | 1987-08-26 | 1987-08-26 | Method for decomposing ozone |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6456123A JPS6456123A (en) | 1989-03-03 |
| JPH043247B2 true JPH043247B2 (en) | 1992-01-22 |
Family
ID=16586187
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62210245A Granted JPS6456123A (en) | 1987-08-26 | 1987-08-26 | Method for decomposing ozone |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6456123A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5221649A (en) * | 1988-11-28 | 1993-06-22 | Sakai Chemical Industry Co., Ltd. | Catalysts and methods for ozone decomposition |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5314688A (en) * | 1976-07-28 | 1978-02-09 | Toshiba Corp | Production of ozone decomposition catalyst |
| JPS5387972A (en) * | 1977-01-12 | 1978-08-02 | Takeda Chem Ind Ltd | Ozone removing method |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55147819U (en) * | 1979-04-12 | 1980-10-24 |
-
1987
- 1987-08-26 JP JP62210245A patent/JPS6456123A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5314688A (en) * | 1976-07-28 | 1978-02-09 | Toshiba Corp | Production of ozone decomposition catalyst |
| JPS5387972A (en) * | 1977-01-12 | 1978-08-02 | Takeda Chem Ind Ltd | Ozone removing method |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6456123A (en) | 1989-03-03 |
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