JPS5844410B2 - Itsusankachitsusosankasiyokubai Oyobi Sankahou - Google Patents
Itsusankachitsusosankasiyokubai Oyobi SankahouInfo
- Publication number
- JPS5844410B2 JPS5844410B2 JP48052829A JP5282973A JPS5844410B2 JP S5844410 B2 JPS5844410 B2 JP S5844410B2 JP 48052829 A JP48052829 A JP 48052829A JP 5282973 A JP5282973 A JP 5282973A JP S5844410 B2 JPS5844410 B2 JP S5844410B2
- Authority
- JP
- Japan
- Prior art keywords
- catalyst
- sankahou
- itsusankachitsusosankasiyokubai
- oyobi
- present
- 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
Links
- 239000003054 catalyst Substances 0.000 claims description 16
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 claims description 10
- 239000007789 gas Substances 0.000 claims description 7
- 230000003647 oxidation Effects 0.000 claims description 5
- 238000007254 oxidation reaction Methods 0.000 claims description 5
- 238000002441 X-ray diffraction Methods 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 150000001340 alkali metals Chemical class 0.000 claims description 2
- 238000010438 heat treatment Methods 0.000 claims description 2
- 229910000272 alkali metal oxide Inorganic materials 0.000 claims 1
- 229910000287 alkaline earth metal oxide Inorganic materials 0.000 claims 1
- 230000001747 exhibiting effect Effects 0.000 claims 1
- 239000008187 granular material Substances 0.000 claims 1
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 claims 1
- 239000012528 membrane Substances 0.000 claims 1
- 239000000843 powder Substances 0.000 claims 1
- 229910002089 NOx Inorganic materials 0.000 description 6
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 241000899717 Itaya Species 0.000 description 2
- JCXJVPUVTGWSNB-UHFFFAOYSA-N nitrogen dioxide Inorganic materials O=[N]=O JCXJVPUVTGWSNB-UHFFFAOYSA-N 0.000 description 2
- MGWGWNFMUOTEHG-UHFFFAOYSA-N 4-(3,5-dimethylphenyl)-1,3-thiazol-2-amine Chemical compound CC1=CC(C)=CC(C=2N=C(N)SC=2)=C1 MGWGWNFMUOTEHG-UHFFFAOYSA-N 0.000 description 1
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- YKTSYUJCYHOUJP-UHFFFAOYSA-N [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] Chemical compound [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] YKTSYUJCYHOUJP-UHFFFAOYSA-N 0.000 description 1
- 238000003915 air pollution Methods 0.000 description 1
- 229910052783 alkali metal Inorganic materials 0.000 description 1
- 229910052784 alkaline earth metal Inorganic materials 0.000 description 1
- 150000001342 alkaline earth metals Chemical class 0.000 description 1
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 229910052593 corundum Inorganic materials 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000010436 fluorite Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 239000003949 liquefied natural gas Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 229910001845 yogo sapphire Inorganic materials 0.000 description 1
Landscapes
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
- Catalysts (AREA)
- Treating Waste Gases (AREA)
Description
【発明の詳細な説明】
本発明は一酸化窒素（本明細書ではＮＯと言う）の酸化
触媒の製造方法に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for producing a nitrogen monoxide (herein referred to as NO) oxidation catalyst.
最近の大気汚染防止基準は一層きびしくなりＮＯｘ
（窒素酸化物）についてもその基準はきびしいものにな
っている。Recent air pollution prevention standards have become even stricter and NOx
The standards for nitrogen oxides (nitrogen oxides) are also strict.
一般のボイラーでは、燃料に石炭を用いると、平均４０
０ｐｐｍ、重油で３００ｐｐｍ液化天然ガスを用いると
、２００ｐｐｍのＮＯｘが排出され、この着地濃度の規
制上限は、現在０．ｌｐｐｍであるがやがて０．Ｏ２ｐ
ｐｍときびしくなることが予想されている。In a typical boiler, if coal is used as fuel, the average
If 300 ppm liquefied natural gas is used with 0 ppm and heavy oil, 200 ppm of NOx will be emitted, and the upper limit of this landing concentration is currently 0.0 ppm. lppm, but soon it becomes 0. O2p
It is expected that the pm will become more severe.
このためＮＯＸ発生源において、少くとも現在の８０％
以上のＮＯｘ を除去しなげればならない。Therefore, at least 80% of the current NOx generation source
The above amount of NOx must be removed.
ＮＯｘは主としてＮＯとＮ０２（二酸化窒素）であり、
これらを吸着法によって除去しようとする試みがなされ
ているが、除去可能なものはＮＯ以外のＮＯｘであり、
ＮＯだけはなかなか吸着されない。NOx is mainly NO and N02 (nitrogen dioxide),
Attempts have been made to remove these by adsorption methods, but what can be removed is NOx other than NO;
Only NO is difficult to adsorb.
本発明の目的は、Ｎｏを速く、効果的に酸化する触媒の
製造方法の開発にある。An object of the present invention is to develop a method for producing a catalyst that oxidizes No quickly and effectively.
本発明者は、各種触媒のテストを行なっていた＊＊とこ
ろ、まず通常の含湿気体では効果が少ないが、ＮＯを含
有する乾燥混合気体を用い、これに酸素を少量添加して
各種触媒に接触させると、ある程度Ｎｏが酸化されるこ
とが判明した。The inventor of the present invention was conducting tests on various catalysts. First of all, ordinary humid gas has little effect, but using a dry mixed gas containing NO, and adding a small amount of oxygen to this, various catalysts were tested. It was found that when brought into contact, No was oxidized to some extent.
使用した触媒は青ゲルを主体としたもの、活性アルミナ
を主体としたもの、天然産凝灰岩の一種を主体としたも
のである。The catalysts used were one mainly composed of blue gel, one mainly composed of activated alumina, and one mainly composed of a type of naturally occurring tuff.
これらの結果を実施例に示したが、驚くべきことに天然
産凝灰岩の或種のものは他の触媒にくらべ１００倍以上
の酸化速度を示している。These results are shown in the Examples, and surprisingly, some types of naturally produced tuff exhibit an oxidation rate that is 100 times or more higher than that of other catalysts.
本テストに使用した天然産凝灰岩は、主としてＳｉｏ２
、Ａｌ２Ｏ３及びＮ２０からなり、■−１０重量％のア
ルカリ金属およびアルカリ土類金属の酸化物を有する含
水アルミニウムシリケートであって、−膜組成式
％式％
で示すことの出来る弗石を含有する凝灰岩からなり、主
としてＢ表に示す如きＸ線回折像を有する天然産無機物
質のみが有効でありこれを適当な粒度に粉砕して乾燥ガ
ス気流中で少くとも１０分間１００〜９００℃望ましく
は２００〜７００℃で熱処理を行なったもののみが有効
である。The naturally produced tuff used in this test was mainly Sio2
, Al2O3 and N20, and -10% by weight of oxides of alkali metals and alkaline earth metals, which is a hydrous aluminum silicate containing fluorite, which can be represented by the film composition formula %. Only naturally produced inorganic substances having an X-ray diffraction pattern as shown in Table B are effective.This is ground to an appropriate particle size and heated at 100-900°C for at least 10 minutes in a stream of dry gas, preferably at 200-900°C. Only those heat-treated at 700°C are effective.
なお、酸素濃度はほぼ３％まで影響する。Note that the oxygen concentration affects up to approximately 3%.
以下にＢ表を示す。Table B is shown below.
なお、Ｂ表のＸ線回折像を示す凝灰岩は、我国では主と
して東北地方及び光用地方に存在し、例えば、山形県米
沢市板谷及び鹿児島県日置郡郡山町産のものがその代表
例である。In addition, tuff showing the X-ray diffraction images in Table B is mainly found in the Tohoku region and Hikari region in Japan, and representative examples include those from Itaya, Yonezawa City, Yamagata Prefecture, and Koriyama Town, Hioki District, Kagoshima Prefecture. .
以上の如き触媒を用い、乾燥した含ＮＯ混合気体で且つ
酸素を含有せしめた混合気体を接触せしめることにより
本発明は完成し、他の触媒に比し１００倍、条件によっ
ては１０００倍の酸化速度をもつことが出来、又この触
媒を用いた効果的な酸化方法を提供することが出来る。The present invention was completed by using the catalyst described above and bringing it into contact with a dry mixed gas containing NO and oxygen, resulting in an oxidation rate that is 100 times faster than other catalysts, and 1000 times faster depending on the conditions. It is also possible to provide an effective oxidation method using this catalyst.
本発明の触媒を本発明の条件で活用することに＊木より
、Ｎｏは触媒上で瞬時に酸化され、触媒上に吸着著積す
る。When the catalyst of the present invention is used under the conditions of the present invention, No is instantaneously oxidized on the catalyst and accumulated on the catalyst.
以下に実施例をもって本発明の詳細な説明するが、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 described in detail below with reference to Examples, but the present invention is not limited to these Examples.
実施例 ｌ
５ｉｎ２６６．６８％、Ａ１２０３１１．３０％、Ｆｅ
２Ｏ３０，８９％、Ｍｇ０ １．１４％、Ｃａ０１．８
６％、Ｎａ、、 ００．４３％、Ｋ２Ｏ４，２５％なる
組成を有し、Ｘ線回折像
なる山形県米沢市板谷産の凝灰岩を５メツシユに粉砕し
、空気中で１時間５００℃で熱処理し、得られた本発明
の触媒を内径２６駕、φ、長さ８０駕１３２％、２９０
％の充填塔に充填し、これにＮｏの濃度を４７４ｐｐｍ
に調整した窒素ガスを通過させて、同時に酸素ガスを種
々の割合でこれに混合した。Example l 5in266.68%, A120311.30%, Fe
2O30.89%, Mg0 1.14%, Ca01.8
Tuff from Itaya, Yonezawa City, Yamagata Prefecture, which has a composition of 6% Na, 0.43%, and 25% K2O4, and whose X-ray diffraction image is pulverized into 5 meshes, was heat-treated in air at 500℃ for 1 hour. The catalyst of the present invention obtained was
% packed tower, and the No concentration was 474 ppm.
Nitrogen gas, adjusted to
これらの混合、気体は露点約−５０℃に＊＊乾燥されて
おり、この他に一２０℃、０℃、十２０℃の試験も行な
った。These mixed gases were dried to a dew point of about -50°C, and tests were also conducted at -20°C, 0°C, and 120°C.
試験結果を以下に示す。The test results are shown below.
なお、比較例として青ゲル（１２０℃乾燥）と活性アル
ミナ（３００℃乾燥）の試験も行なった。As comparative examples, tests were also conducted on blue gel (dried at 120°C) and activated alumina (dried at 300°C).
試験結果を以下に示す。The test results are shown below.
以上の如く、種々の条件においても本発明の触媒及びこ
れを用いる方法の優秀なことが証明されている。As described above, the catalyst of the present invention and the method using the same have been proven to be excellent under various conditions.
実施例 ２
実施例１０本発明（７）につき、６時間の連続運転を行
なっているが、出ガス中のＮＯ濃度は依然として０．３
０ ｐｐｍであり、９９．９４％の脱ＮＯ率を２示して
いる。Example 2 Example 10 The present invention (7) was operated continuously for 6 hours, but the NO concentration in the output gas was still 0.3.
0 ppm, indicating a NO removal rate of 99.94%.
なお、触媒の再生は加熱、減圧、水洗等によって行なう
ことができる。Note that the catalyst can be regenerated by heating, reducing pressure, washing with water, etc.
Claims (1)
土類金属の酸化物を含む含水アルミニウムシリケートを
含有し、Ｘ線回折像 を示す天然産凝灰岩の粉体又は粒体を乾燥ガス気流中で
１００〜９００℃、殊に２００〜７００℃なる温度で、
少くなくとも１０分間加熱処理することを特徴とする一
酸化窒素酸化触媒の製造方法。[Claims] 1-Membrane composition represented by the formula % formula %, containing hydrated aluminum silicate containing 10% by weight of alkali metal and alkaline earth metal oxides, and exhibiting an X-ray diffraction pattern Powder or granules of produced tuff in a dry gas stream at a temperature of 100 to 900°C, especially 200 to 700°C,
1. A method for producing a nitrogen monoxide oxidation catalyst, the method comprising heating for at least 10 minutes.
Priority Applications (14)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP48052829A JPS5844410B2 (en) | 1973-05-12 | 1973-05-12 | Itsusankachitsusosankasiyokubai Oyobi Sankahou |
| GB1795474A GB1425282A (en) | 1973-05-12 | 1974-04-24 | Oxidation catalst for removal of nitrogen monoxide in exhaust gas |
| US05/467,085 US4013588A (en) | 1973-05-12 | 1974-05-06 | Oxidation catalyst for removal of nitrogen monoxide in exhaust gas |
| FR7415772A FR2228537B1 (en) | 1973-05-12 | 1974-05-07 | |
| CA199,323A CA1021132A (en) | 1973-05-12 | 1974-05-08 | Oxidation catalyst for removal of nitrogen monooxide in exhaust gas |
| BE144080A BE814738A (en) | 1973-05-12 | 1974-05-08 | OXIDIZATION CATALYST FOR THE REMOVAL OF NITROGEN DIOXIDE FROM EXHAUST GASES |
| AT383774A AT344667B (en) | 1973-05-12 | 1974-05-09 | USE OF A TUFF AS OXYDATION CATALYST WITH ADSORBING EFFECT FOR NO FROM GASES CONTAINING NO AND O2 |
| SE7406304A SE407750B (en) | 1973-05-12 | 1974-05-10 | PROCEDURE AND CATALYST FOR OXIDATION OF NITROGEN MONOXIDE, ESPECIALLY IN CONNECTION WITH EXHAUST PURIFICATION |
| NL7406318A NL7406318A (en) | 1973-05-12 | 1974-05-10 | |
| BR3848/74A BR7403848D0 (en) | 1973-05-12 | 1974-05-10 | OXIDATION CATALYST COMPOSITION AND PROCESS FOR NITROGEN MONOXIDE OXIDATION |
| CH644574A CH597912A5 (en) | 1973-05-12 | 1974-05-10 | |
| DE2422708A DE2422708C3 (en) | 1973-05-12 | 1974-05-10 | Using heat-treated tuff to remove nitric oxide from exhaust gases |
| SU742026607A SU603322A3 (en) | 1973-05-12 | 1974-05-12 | Catalyst for purifying final gas from nitric oxides |
| IT22611/74A IT1012286B (en) | 1973-05-12 | 1974-05-13 | OXIDATION CATALYST FOR THE REMOVAL OF NITROGEN MONOXIDE FROM THE EXHAUST GAS |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP48052829A JPS5844410B2 (en) | 1973-05-12 | 1973-05-12 | Itsusankachitsusosankasiyokubai Oyobi Sankahou |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS502690A JPS502690A (en) | 1975-01-11 |
| JPS5844410B2 true JPS5844410B2 (en) | 1983-10-03 |
Family
ID=12925724
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP48052829A Expired JPS5844410B2 (en) | 1973-05-12 | 1973-05-12 | Itsusankachitsusosankasiyokubai Oyobi Sankahou |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5844410B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH031862U (en) * | 1989-05-29 | 1991-01-10 |
-
1973
- 1973-05-12 JP JP48052829A patent/JPS5844410B2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS502690A (en) | 1975-01-11 |
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