JP3072992B2 - Method and apparatus for removing carbon monoxide with two-layer filling - Google Patents
Method and apparatus for removing carbon monoxide with two-layer fillingInfo
- Publication number
- JP3072992B2 JP3072992B2 JP63244147A JP24414788A JP3072992B2 JP 3072992 B2 JP3072992 B2 JP 3072992B2 JP 63244147 A JP63244147 A JP 63244147A JP 24414788 A JP24414788 A JP 24414788A JP 3072992 B2 JP3072992 B2 JP 3072992B2
- Authority
- JP
- Japan
- Prior art keywords
- carbon monoxide
- filled
- catalyst
- feed air
- removing carbon
- 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 - Fee Related
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
- F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
- F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
- F25J3/04151—Purification and (pre-)cooling of the feed air; recuperative heat-exchange with product streams
- F25J3/04163—Hot end purification of the feed air
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
- F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
- F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
- F25J3/04151—Purification and (pre-)cooling of the feed air; recuperative heat-exchange with product streams
- F25J3/04163—Hot end purification of the feed air
- F25J3/04169—Hot end purification of the feed air by adsorption of the impurities
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J2205/00—Processes or apparatus using other separation and/or other processing means
- F25J2205/82—Processes or apparatus using other separation and/or other processing means using a reactor with combustion or catalytic reaction
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J2215/00—Processes characterised by the type or other details of the product stream
- F25J2215/42—Nitrogen or special cases, e.g. multiple or low purity N2
- F25J2215/44—Ultra high purity nitrogen, i.e. generally less than 1 ppb impurities
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
- Separation Of Gases By Adsorption (AREA)
- Separation By Low-Temperature Treatments (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、一酸化炭素の除去に係り、特に大気を圧縮
し冷却して深冷分離する空気分離装置において、製品ガ
ス中の一酸化炭素を除去するため、原料空気中の一酸化
炭素を酸化し二酸化炭素に転化する方法及び装置に関す
るものである。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the removal of carbon monoxide. TECHNICAL FIELD The present invention relates to a method and an apparatus for oxidizing carbon monoxide in raw material air to convert it into carbon dioxide in order to remove carbon monoxide.
従来の空気分離装置においては、一酸化炭素はモレキ
ュラシーブスを充填した吸着塔で吸着されず、また、一
酸化炭素の沸点と窒素の沸点はほぼ同じため、蒸留塔で
分離できず、一酸化炭素が製品ガス中の不純物として含
有されていた。なお、この種の装置として関連するもの
には例えば特開昭55−152517号等が挙げられる。In a conventional air separation device, carbon monoxide is not adsorbed by an adsorption tower filled with molecular sieves, and the boiling point of carbon monoxide is almost the same as that of nitrogen. Was contained as an impurity in the product gas. It should be noted that Japanese Patent Application Laid-Open (JP-A) No. 55-152517 is related to this type of apparatus.
上記従来技術は一酸化炭素の除去について配慮がされ
ておらず、蒸留塔が精留分離された製品ガス中に一酸化
炭素が不純物として含有するという欠点があった。The above-mentioned prior art does not consider the removal of carbon monoxide, and has a drawback that carbon monoxide is contained as an impurity in the product gas obtained by rectifying and separating the distillation column.
本発明の目的は、製品ガス中の一酸化炭素の含有率を
低減できる二層充填式一酸化炭素の除去方法及び装置を
提供することにある。An object of the present invention is to provide a method and an apparatus for removing carbon monoxide in a two-layer filling system, which can reduce the content of carbon monoxide in a product gas.
上記目的は、触媒槽を２層充填式とし、原料空気の入
口側（上流側）に白金触媒を充填し、出口側（下流側）
にパラジュウム触媒を充填することにより、達成され
る。The above purpose is to fill the catalyst tank with a two-layer filling type, fill the platinum side on the inlet side (upstream side) of the raw air, and on the outlet side (downstream side).
This is achieved by filling the palladium catalyst with a palladium catalyst.
原料空気中には、約1ppmの一酸化炭素と約0.1ppmのSO
2が含まれているが、触媒槽の入口側に充填された白金
触媒はSO2が触媒表面に付着しても一酸化炭素の酸化反
応率の性能低下が少ない。また出口側に充填されたパラ
ジウム触媒は一酸化炭素の酸化反応率が高いので、触媒
槽出口の原料空気中の一酸化炭素約0.1ppmの性能で約１
年間連続運転することができる。In the raw air, about 1 ppm of carbon monoxide and about 0.1 ppm of SO
2, the platinum catalyst filled on the inlet side of the catalyst tank has a small decrease in the performance of the oxidation reaction rate of carbon monoxide even if SO 2 adheres to the catalyst surface. Since the palladium catalyst filled at the outlet has a high rate of oxidation reaction of carbon monoxide, the performance of about 0.1 ppm of carbon monoxide in the raw material air at the outlet of the catalyst tank is about 1 ppm.
It can be operated continuously for a year.
以下、本発明の一実施例を第１図より説明する。 Hereinafter, one embodiment of the present invention will be described with reference to FIG.
図において、空気過器１から大気を取込み、原料空
気圧縮機２で約5kg/cm2Gに圧縮して触抛槽３に送入す
る。触媒槽３は二層充填式となっており、入口側（上流
側）には白金触媒４が充填され、出口側（下流側）には
パラジウム触媒５が充填されている。In the figure, the atmosphere is taken from an air filter 1, compressed to about 5 kg / cm 2 G by a raw material air compressor 2 and sent to a contact tank 3. The catalyst tank 3 is of a two-layer filling type, in which a platinum catalyst 4 is filled on the inlet side (upstream side) and a palladium catalyst 5 is filled on the outlet side (downstream side).
原料空気中に含まれている約1ppmの一酸化炭素は、白
金触媒４およびパラジウム触媒５で原料空気中の酸素と
化合して二酸化炭素な転化した後、吸着塔６に送入され
る。About 1 ppm of carbon monoxide contained in the raw air is combined with oxygen in the raw air by the platinum catalyst 4 and the palladium catalyst 5 to be converted into carbon dioxide, and then sent to the adsorption tower 6.
吸着塔６にはモレキュラシーブスが充填されており、
原料空気中に含まれている水分および二酸化炭素が吸着
された後、空気分離器７で深冷温度まで冷却液化されて
精留分離され、導管８より一酸化炭素約0.1ppm以下の製
品ガスが採取される。The adsorption tower 6 is filled with molecular sieves,
After the moisture and carbon dioxide contained in the raw material air are adsorbed, they are cooled and liquefied to the cryogenic temperature in the air separator 7 and rectified and separated, and the product gas containing about 0.1 ppm or less of carbon monoxide is supplied from the conduit 8. Collected.
一般に触媒槽に充填する酸化触媒としては、パラジウ
ム，白金，コバルト，マンガン，ニッケル等があるが、
パラジウムが反応率が高い。しかし、パラジウムは大気
中に含まれるSO2（二酸化いおう）が触媒毒となるた
め、性能劣化を起し長期連続運転ができない。また、白
金は反応率が低く価格が高いが、SO2による性能劣化が
少ないという長所がある。Generally, oxidation catalysts to be filled in the catalyst tank include palladium, platinum, cobalt, manganese, nickel and the like.
Palladium has a high reaction rate. However, since palladium contains SO 2 (sulfur dioxide) contained in the atmosphere as a catalyst poison, its performance deteriorates and long-term continuous operation is not possible. Also, platinum has a low reaction rate and a high price, but has the advantage of less performance degradation due to SO 2 .
なお、本実施例では白金触媒とパラジウム触媒とを用
いた二層充填式で説明したが、三層以上の多層充填でも
良い。また、酸化触媒の組合せも適宜選択可能で本実施
例に限定されるものではない。In this embodiment, a two-layer filling system using a platinum catalyst and a palladium catalyst has been described, but a multi-layer filling of three or more layers may be used. Further, the combination of the oxidation catalyst can be appropriately selected and is not limited to the present embodiment.
本実施例によれば、製品ガス中の一酸化炭素の含有率
が低減できると共に、約１年間の連続運転が可能となる
効果がある。According to this embodiment, there is an effect that the content of carbon monoxide in the product gas can be reduced and continuous operation can be performed for about one year.
本発明によれば、大気中の不純物であるSO2による性
能劣化の少ない白金触媒と酸化反応率の高いパラジウム
触媒の二層充填式としているので、製品ガス中の一酸化
炭素の含有率を低減できる効果がある。According to the present invention, since a two-layer-filled with high palladium catalyst with less platinum catalyst and the oxidation reaction rate performance degradation due to SO 2 which is an impurity in the atmosphere, reducing the content of carbon monoxide in the product gas There is an effect that can be done.
第１図は本発明の一実施例の一酸化炭素除去装置の概略
系統図である。 ２……原料空気圧縮機、３……触媒槽、４……白金触
媒、５……パラジウム触媒、６……吸着塔、７……空気
分離器FIG. 1 is a schematic system diagram of a carbon monoxide removing apparatus according to one embodiment of the present invention. 2 ... raw material air compressor, 3 ... catalyst tank, 4 ... platinum catalyst, 5 ... palladium catalyst, 6 ... adsorption tower, 7 ... air separator
───────────────────────────────────────────────────── フロントページの続き (72)発明者 津島 寛 山口県下松市大字東豊井794番地 日立 テクノエンジニアリング株式会社笠戸事 業所内 (56)参考文献 特開 昭61−225568（ＪＰ，Ａ) 特開 昭54−19494（ＪＰ，Ａ) 特開 昭50−43041（ＪＰ，Ａ) 特開 昭48−27990（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) B01D 53/04 B01D 53/94 ──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Hiroshi Tsushima 794, Higashitoyoi, Kazamatsu-shi, Yamaguchi Prefecture Inside the Hitachi Techno Engineering Co., Ltd. Kasado Office (56) References JP-A-61-225568 (JP, A) JP-A-54-19494 (JP, A) JP-A-50-43041 (JP, A) JP-A-48-27990 (JP, A) (58) Fields investigated (Int. Cl. 7 , DB name) B01D 53 / 04 B01D 53/94
Claims (2)
まれる一酸化炭素を除去する方法において、 前記原料空気の入口側に触媒毒SO2による性能劣化の少
ない白金触媒を充填し、出口側に反応率の高いパラジュ
ウム触媒を充填した二層充填式の触媒槽により一酸化炭
素を酸化反応させ、二酸化炭素に転化後吸着除去するこ
とを特徴とする二層充填式一酸化炭素の除去方法。1. A method for removing carbon monoxide contained in the feed air fed to the air separation unit, filled with a less platinum catalyst performance degradation due to poisoning SO 2 in the inlet side of the feed air, an outlet A method for removing carbon monoxide, comprising the steps of oxidizing carbon monoxide in a two-layer packed catalyst tank filled with a palladium catalyst having a high conversion rate on the side, converting the carbon monoxide to carbon dioxide, and adsorbing and removing the carbon monoxide. .
まれる一酸化炭素を除去する装置において、 前記原料空気の入口側に触媒毒SO2による性能劣化の少
ない白金触媒を充填し、出口側に反応率の高いパラジウ
ム触媒を充填した二層充填式の触媒槽を吸着塔の上流側
に設けたことを特徴とする一酸化炭素除去装置。2. A device for removing carbon monoxide contained in the feed air fed to the air separation unit, filled with a less platinum catalyst performance degradation due to poisoning SO 2 in the inlet side of the feed air, an outlet A carbon monoxide removing apparatus, comprising a double-layer-filled catalyst tank filled with a palladium catalyst having a high reaction rate on the upstream side of the adsorption tower.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63244147A JP3072992B2 (en) | 1988-09-30 | 1988-09-30 | Method and apparatus for removing carbon monoxide with two-layer filling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63244147A JP3072992B2 (en) | 1988-09-30 | 1988-09-30 | Method and apparatus for removing carbon monoxide with two-layer filling |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0295410A JPH0295410A (en) | 1990-04-06 |
| JP3072992B2 true JP3072992B2 (en) | 2000-08-07 |
Family
ID=17114460
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63244147A Expired - Fee Related JP3072992B2 (en) | 1988-09-30 | 1988-09-30 | Method and apparatus for removing carbon monoxide with two-layer filling |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3072992B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5588935B2 (en) * | 2011-07-19 | 2014-09-10 | 日立Ｇｅニュークリア・エナジー株式会社 | Exhaust gas recombiner and gas waste treatment system of boiling water nuclear power plant equipped with the same |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61225568A (en) * | 1985-03-29 | 1986-10-07 | 株式会社日立製作所 | air separation equipment |
| JPS6265746A (en) * | 1985-09-18 | 1987-03-25 | Toyota Motor Corp | Monolith catalyst for cleaning up of exhaust gas |
-
1988
- 1988-09-30 JP JP63244147A patent/JP3072992B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0295410A (en) | 1990-04-06 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |