KR19980055646A - Method of measuring the surface area of automobile catalyst noble metals - Google Patents
Method of measuring the surface area of automobile catalyst noble metals Download PDFInfo
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- KR19980055646A KR19980055646A KR1019960074880A KR19960074880A KR19980055646A KR 19980055646 A KR19980055646 A KR 19980055646A KR 1019960074880 A KR1019960074880 A KR 1019960074880A KR 19960074880 A KR19960074880 A KR 19960074880A KR 19980055646 A KR19980055646 A KR 19980055646A
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Abstract
본 발명은 자동차 촉매의 귀금속 표면적 측정방법에 관한 것으로서, 더욱 상세하게는 일산화탄소를 촉매에 흡착시키고 여기에 수소를 흘려보내 흡착된 일산화탄소와 반응시켜 귀금속 표면에서 생성된 메탄의 양을 측정하여 귀금속 표면적을 구하는 자동차 촉매의 귀금속 표면적 측정방법에 관한 것이다.The present invention relates to a method for measuring the surface area of a noble metal of an automobile catalyst, and more particularly, by adsorbing carbon monoxide to a catalyst and flowing hydrogen therein to react with the adsorbed carbon monoxide to measure the amount of methane generated on the surface of the precious metal, thereby measuring the surface area of the precious metal. The present invention relates to a method for measuring the precious metal surface area of automobile catalysts.
Description
본 발명은 자동차 촉매의 귀금속 표면적 측정방법에 관한 것으로서, 더욱 상세하게는 일산화탄소를 촉매에 흡착시키고 여기에 수소를 흘려보내 흡착된 일산화탄소와 반응시켜 귀금속 표면에서 생성된 메탄의 양을 측정하여 귀금속 표면적을 구하는 자동차 촉매의 귀금속 표면적 측정방법에 관한 것이다.The present invention relates to a method for measuring the surface area of a noble metal of an automobile catalyst, and more particularly, by adsorbing carbon monoxide to a catalyst and flowing hydrogen therein to react with the adsorbed carbon monoxide to measure the amount of methane generated on the surface of the precious metal, thereby measuring the surface area of the precious metal. The present invention relates to a method for measuring the precious metal surface area of automobile catalysts.
종래 자동차 촉매의 귀금속 표면적을 측정하는 방법은 일산화탄소가 촉매의 귀금속에 잘 흡착한다는 가정 하에서 일산화탄소 가스를 촉매층에 흘려서 화학흡착(chemisorption)된 양으로써 귀금속의 표면적을 구하였다.In the conventional method for measuring the noble metal surface area of the automobile catalyst, the surface area of the noble metal was obtained by the amount of chemisorbed by flowing carbon monoxide gas into the catalyst layer under the assumption that carbon monoxide adsorbs well on the noble metal of the catalyst.
그러나, 종래 방법은 일산화탄소 가스가 귀금속 외에도 베이스 메탈 옥사이드(base metal oxide)에도 잘 흡착하므로 정확한 귀금속 표면적의 측정이 불가하였다.However, in the conventional method, since the carbon monoxide gas adsorbs well to the base metal oxide in addition to the precious metal, accurate measurement of the precious metal surface area was not possible.
본 발명은 상기와 같은 종래 자동차 촉매의 귀금속 표면적의 측정방법의 문제점을 해결하기 위하여 귀금속에 일산화탄소 가스를 흘려보내 귀금속 표면적에 흡착시키고 여기에 수소 가스를 흘려보내 귀금속 표면적에서 생성되는 메탄의 양으로써 귀금속 표면적을 측정하는 방법을 제공하는 데 그 목적이 있다.In order to solve the problems of the method for measuring the noble metal surface area of the conventional automobile catalyst as described above, carbon monoxide gas is flowed into the noble metal and adsorbed onto the noble metal surface area, and hydrogen gas is flowed into the noble metal to produce the precious metal as the amount of methane generated from the noble metal surface area. The purpose is to provide a method for measuring the surface area.
본 발명은 관내에 촉매의 소정량을 채우고, 여기에 일산화탄소 가스를 흘려보낸 다음, 다시 수소 가스를 흘려보내 생성된 메탄의 양을 측정하는 자동차 촉매의 귀금속 표면적 측정방법을 그 특징으로 한다.The present invention is characterized by measuring a precious metal surface area of an automobile catalyst which fills a predetermined amount of catalyst in a pipe, sends carbon monoxide gas to it, and then flows hydrogen gas again to measure the amount of methane produced.
이와같은 본 발명을 더욱 상세하게 설명하면 다음과 같다.The present invention will be described in more detail as follows.
본 발명은 일산화탄소만을 사용하여 촉매의 귀금속 표면적을 측정하던 방법을 개선하여 일산화탄소 가스를 흘려보낸 후 다시 수소 가스를 흘려보내 귀금속 표면에 생성된 메탄의 양으로 귀금속 표면을 측정한다.The present invention improves the method of measuring the noble metal surface area of the catalyst using only carbon monoxide to flow carbon monoxide gas and then flow hydrogen gas again to measure the noble metal surface by the amount of methane generated on the surface of the noble metal.
관내에 채워진 촉매에 일산화탄소 가스를 흘려보내면 귀금속 외에도 베이스 메탈 옥사이드(base metal oxide)에도 일산화탄소가 잘 흡착된다.When carbon monoxide gas flows into the catalyst filled in the tube, carbon monoxide is well adsorbed to the base metal oxide in addition to the precious metal.
그러나, 2차적으로 수소 가스를 흘려보내면 일산화탄소와 수소 사이의 메탄 생성 반응이 진행되는데, 이같은 메탄생성 반응은 귀금속 표면에서만 발생하게 된다.However, when hydrogen gas is flowed secondarily, a methane production reaction between carbon monoxide and hydrogen proceeds, and this methane production reaction occurs only on the precious metal surface.
이에따라 수소 가스를 흘려보내 이미 흡착되어 있는 일산화탄소와 반응시켜 생성된 메탄의 양을 측정하면 촉매의 귀금속 표면적을 측정할 수 있다.Accordingly, the surface area of the noble metal of the catalyst can be measured by measuring the amount of methane produced by flowing hydrogen gas and reacting with carbon monoxide already adsorbed.
본 발명에 따른 자동차 촉매의 귀금속 표면적 측정방법은 귀금속 표면에서만 발생되는 메탄 생성반응을 통해 정확한 귀금속 표면적을 측정할 수 있으므로 해당분야에 유용하게 사용할 수 있다.The method for measuring the precious metal surface area of the automobile catalyst according to the present invention can be usefully used in the art because it is possible to measure the accurate precious metal surface area through the methane formation reaction generated only on the precious metal surface.
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Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019960074880A KR19980055646A (en) | 1996-12-28 | 1996-12-28 | Method of measuring the surface area of automobile catalyst noble metals |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019960074880A KR19980055646A (en) | 1996-12-28 | 1996-12-28 | Method of measuring the surface area of automobile catalyst noble metals |
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| Publication Number | Publication Date |
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| KR19980055646A true KR19980055646A (en) | 1998-09-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| KR1019960074880A KR19980055646A (en) | 1996-12-28 | 1996-12-28 | Method of measuring the surface area of automobile catalyst noble metals |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100452454B1 (en) * | 2002-06-26 | 2004-10-12 | 현대자동차주식회사 | Method for measuring outer size of precious metal included catalyst for vehicle |
| KR100660138B1 (en) * | 2005-07-06 | 2006-12-21 | 한양대학교 산학협력단 | Air sterilizer |
| GB2609504B (en) * | 2021-08-06 | 2024-02-21 | Peter Glass | Wall mountable air purification unit |
-
1996
- 1996-12-28 KR KR1019960074880A patent/KR19980055646A/en not_active Application Discontinuation
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100452454B1 (en) * | 2002-06-26 | 2004-10-12 | 현대자동차주식회사 | Method for measuring outer size of precious metal included catalyst for vehicle |
| KR100660138B1 (en) * | 2005-07-06 | 2006-12-21 | 한양대학교 산학협력단 | Air sterilizer |
| GB2609504B (en) * | 2021-08-06 | 2024-02-21 | Peter Glass | Wall mountable air purification unit |
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