KR100648594B1 - Catalytic compositions for oxidizing particular matters and Catalytic soot filters employing the compositions - Google Patents
Catalytic compositions for oxidizing particular matters and Catalytic soot filters employing the compositions Download PDFInfo
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- G—PHYSICS
- G08—SIGNALLING
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- G08B15/00—Identifying, scaring or incapacitating burglars, thieves or intruders, e.g. by explosives
- G08B15/008—Identifying, scaring or incapacitating burglars, thieves or intruders, e.g. by explosives by simulating the existence of a security system, e.g. a mock video camera to scare thieves
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B15/00—Identifying, scaring or incapacitating burglars, thieves or intruders, e.g. by explosives
- G08B15/02—Identifying, scaring or incapacitating burglars, thieves or intruders, e.g. by explosives with smoke, gas, or coloured or odorous powder or liquid
Abstract
본 발명은 입자물질 산화촉매조성물 및 이를 이용한 디젤 입자물질 배기필터, 보다 구체적으로는 다공성 지지체에 함침되며 귀금속물질이 배제된 구리 및 망간 단독 또는 복합산화물로 구성된 입자물질 산화촉매조성물, 및 상기 촉매조성물질을 침적, 포함하는 촉매화된 디젤 입자물질 배기필터에 관한 것으로,디젤엔진 배기가스 내의 CO, HC 및 NOx 배출량을 감소시킬 수 있을 뿐 아니라, 무엇보다도 귀금속을 사용하지 아니하고도 합리적인 온도에서 PM을 연소시킬 수 있는 발명이다.The present invention provides a particulate matter oxidation catalyst composition and a diesel particulate matter exhaust filter using the same, more specifically, a particulate matter oxidation catalyst composition composed of copper and manganese alone or a composite oxide impregnated in a porous support and excluding a precious metal material, and the catalyst composition. The present invention relates to a catalytic diesel particulate exhaust filter that deposits and contains materials, which not only reduces CO, HC and NOx emissions in diesel engine exhaust gas, but, above all, PM at a reasonable temperature without using precious metals. It is an invention that can be burned.
비귀금속, 산화촉매, PM Non-noble Metals, Oxidation Catalysts, PM
Description
본 발명은 입자물질 산화촉매조성물 및 이를 이용한 디젤 입자물질 배기필터, 보다 구체적으로는 다공성 지지체에 함침되며 귀금속물질이 배제된 구리 및 망간 단독 또는 복합산화물로 구성된 입자물질 산화촉매조성물, 및 상기 촉매조성물질을 침적, 포함하는 촉매화된 디젤 입자물질 배기필터에 관한 것이다.The present invention provides a particulate matter oxidation catalyst composition and a diesel particulate matter exhaust filter using the same, more specifically, a particulate matter oxidation catalyst composition composed of copper and manganese alone or a composite oxide impregnated in a porous support and excluding a precious metal material, and the catalyst composition. A catalyst catalyzed diesel particulate exhaust filter comprising depositing and containing materials.
디젤엔진은 작동특성의 결과로 매우 미세한 입자를 배출한다. 이러한 미립자는 입자물질(particulate matter ;PM)이라 언급된다. 입자물질의 배출외에, 탄화수소, 황산화물, 질소산화물 및 일산화탄소와 같은 다른 유형의 기체화합물도 동시에 배출한다.Diesel engines emit very fine particles as a result of their operating characteristics. Such particulates are referred to as particulate matter (PM). In addition to the release of particulate matter, other types of gaseous compounds such as hydrocarbons, sulfur oxides, nitrogen oxides and carbon monoxide are also emitted simultaneously.
상기 배기가스로부터 입자물질을 포획하는 배기필터는 당업계에 널리 공지되 어 있다. 상기 필터는 일반적으로 복수개의 세공 및 좁은 횡단면을 갖는 다공성의 고체물질로 되어 있어서, 배기가스는 투과되지만 입자물질의 대부분은 포획된다. 필터내 수집된 입자물질량이 증가될수록 배기가스 유속이 점진적으로 방해받기 때문에, 필터내 배압이 증가하여 엔진효율성이 감소하게 된다. 따라서, 상기 배압으로 발생되는 문제를 해결하기 위하여 입자물질의 포획 및 재생이 연속적으로 원할하게 진행되도록 하는 다양한 방안이 시도되며, 일반적으로 배기필터의 강제재생방식 및 촉매재생방식이 연구된다. 강제재생방식은 버너 또는 전기히터를 이용하여 입자물질을 강제연소시켜 필터를 재생하는 방식으로 재생성능면에서는 우수하나 필터에 가해지는 과도한 열충격에 의하여 필터가 손상될 수 있고 복잡한 제어장치의 장착에 따른 과도한 경제적 부담이 따르는 단점이 있다. 또한, 연료에 유기금속첨가제를 주입하여 필터를 재생하는 방법은 재생성능이 우수하기는 하지만, 첨가된 금속성분이 엔진내부에 침적하여 엔진에 악영향을 줄 수 있으며 필터에 포획되지 않는 미세한 크기의 금속성 연료첨가물이 대기로 배출되어 2차 공해를 유발하는 심각한 문제점을 가지고 있어, 현재 시도되는 대부분의 방안은 촉매재생방식이라 할 수 있다.Exhaust filters for trapping particulate matter from the exhaust gases are well known in the art. The filter is generally of a porous solid material having a plurality of pores and a narrow cross section so that the exhaust gas is permeated but most of the particulate matter is trapped. As the amount of particulate matter collected in the filter increases, the exhaust gas flow rate is gradually disturbed, so that the back pressure in the filter increases, thereby reducing engine efficiency. Therefore, in order to solve the problem caused by the back pressure, various methods for continuously and smoothly proceeding the capture and regeneration of particulate matter have been attempted, and generally, forced regeneration and catalytic regeneration of exhaust filters are studied. The forced regeneration method is a method of regenerating the filter by forcibly burning the particulate matter by using a burner or electric heater, which is excellent in terms of regeneration performance, but the filter may be damaged by excessive thermal shock applied to the filter. The disadvantage is the excessive financial burden. In addition, the method of regenerating the filter by injecting the organometallic additive into the fuel has excellent regeneration performance, but the added metal component may be deposited inside the engine, which may adversely affect the engine, and the fine size of the metal is not captured by the filter. Since fuel additives are discharged into the atmosphere and cause secondary pollution, most of the currently attempted methods are catalyst regeneration methods.
촉매재생방식에 관하여는 미국특허 제4,902,487호(이하 '존슨메씨 특허')에서 촉매화된 세라믹모노리스(이하 'DOC부')와 별도의 다공질 세라믹 월플로우 허니컴 필터가 연속으로 배치된 시스템을 구현하고, 디젤차량 배기가스 중의 NO가 Pt를 포함하는 DOC부에서 NO2로 산화되고, 상기 생성된 NO2 산화가스가 후단 필터를 통 과하며, 필터에 포집된 입자물질과 반응하여 225-300℃에서 연소시켜 디젤 배기가스의 입자물질을 제거하는 방법을 제안하고 있다. 상기 NO2 산화가스가 소망 온도에서 연소를 촉진하기 위하여는 필터에서 선택되는 촉매조성물은 Pt, Pd 등 귀금속을 포함하고 있다.Regarding the catalyst regeneration method, a system in which a ceramic monolith (hereinafter referred to as "DOC part") catalyzed by US Patent No. 4,902,487 (hereinafter referred to as "Johnson M Patent") and a separate porous ceramic wall flow honeycomb filter are continuously arranged is implemented. And NO in the diesel vehicle exhaust gas is oxidized to NO2 in a DOC section including Pt, and the generated NO2 oxidizing gas passes through a rear filter and reacts with particulate matter collected in the filter to burn at 225-300 ° C. To remove particulate matter from diesel exhaust gas. In order to promote combustion at the desired temperature of the NO 2 oxidizing gas, the catalyst composition selected from the filter contains a noble metal such as Pt and Pd.
디젤 배기 미립자 필터의 조성물은 많은 특허의 주제가 되어 왔으며, 이들 특허중 다수는 지지체상에 와시코팅된 특정 바나듐 화합물 및 백금 화합물의 혼합물의 사용을 개시하고 있다. 활성성분으로 바나듐 및 백금족 금속을 함유한 산화물로 모놀리스(monolith)를 코팅한, 디젤 배기가스의 정화를 위한 개방 셀 모놀리식 촉매가 미국특허번호 5,514,354호, 5,157,007호에 언급되며, 백금 및 바나듐 산화물을 함유한, 디젤 배기가스를 정화하기 위한 또 다른 촉매가 미국 특허번호 제4,617,289호에 개시되며, 배기가스 흐름을 정화하기 위한 다른 촉매에 대하여 미국특허번호 제5,911,961 ; 4,902,487 ; 4,515,758 ; 5,884,474 ; 5,746989 등을 참조할 수 있다.Compositions of diesel exhaust particulate filters have been the subject of many patents, many of which disclose the use of mixtures of certain vanadium compounds and platinum compounds that are washcoated onto a support. Open cell monolithic catalysts for the purification of diesel exhaust, coated with monoliths with oxides containing vanadium and platinum group metals as active ingredients, are mentioned in US Pat. Nos. 5,514,354, 5,157,007, platinum and vanadium Another catalyst for purifying diesel exhaust gas containing oxides is disclosed in US Pat. No. 4,617,289, and US Pat. No. 5,911,961 for other catalysts for purifying exhaust gas streams; 4,902,487; 4,515,758; 5,884,474; 5,746989 and the like.
한편, 국내에서는 한국특허공개 제2004-89468호 (디젤차량 입자상 물질 제거용 필터 및 이의 제조방법, 이하 '에스케이특허')는 상류의 촉매화된 세라믹 모노리스 및 하류의 촉매화된 필터를 한개의 캔안에 직렬로 배치한 시스템으로, 하류의 촉매화된 필터에서는 촉매의 산화촉진작용에 의하여 입자물질이 연소되는 디젤차량 입자상 물질 제거용 필터에 관한 것으로서, 상기 촉매화된 필터의 촉매조성물은 백 금족 금속염 및 기타 금속염의 콜로이드 혼합액을 담지한 것을 특징으로 한다.On the other hand, in Korea, Korean Patent Publication No. 2004-89468 (a diesel vehicle particulate matter removal filter and a method for manufacturing the same, hereinafter referred to as 'Esk Patent') has a single canister including an upstream catalyzed ceramic monolith and a downstream catalyzed filter. In a system arranged in series in a downstream catalystized filter, a diesel vehicle particulate matter removal filter in which particulate matter is combusted by an oxidation-promoting action of a catalyst, wherein the catalyst composition of the catalyzed filter is a platinum group metal salt. And other colloidal mixtures of metal salts.
이들 국내외 특허는 디젤 입자물질을 연소하기 위한 필터로서 다수의 상이한 촉매조성물을 개시하고 있지만, 귀금속 원소의 필수적 사용을 언급하고 있다.These domestic and foreign patents disclose a number of different catalyst compositions as filters for burning diesel particulate material, but mention the essential use of precious metal elements.
본 발명의 목적은, 배기가스 중의 NO, NO2, O2 및 필터에 생성, 포집된 입자물질과의 촉매연소반응을 촉진시킬 수 있는 비귀금속성 입자물질 산화촉매조성물 및 상기 촉매조성물이 담지된 디젤 입자물질 배기필터를 제공하는 것이다.An object of the present invention is to support the catalytic combustion reaction of NO, NO 2 , O 2 in the exhaust gas and the particulate matter produced and collected in the filter, and the non-noble metallic particulate matter oxidation catalyst composition and the catalyst composition supported thereon. It is to provide a diesel particulate exhaust filter.
본 발명의 목적은 균형점온도(Balance Point Temperature, BPT)를 낮추고, 디젤엔진 배기가스 내의 입자물질을 연속적으로 재생시킬 수 있는 비귀금속성 입자물질 산화촉매조성물이 담지된 디젤 입자물질 배기필터를 제공하는 것이다.SUMMARY OF THE INVENTION An object of the present invention is to provide a diesel particulate matter exhaust filter having a non-noble metallic particulate matter oxidation catalyst composition capable of lowering balance point temperature (BPT) and continuously regenerating particulate matter in a diesel engine exhaust gas. will be.
본 발명의 다른 목적은 디젤엔진 배기가스 중 NOx, CO 및 HC 배출량을 감소시킬 수 있는 디젤 입자물질 배기필터를 개시하는 것이다.Another object of the present invention is to disclose a diesel particulate matter exhaust filter capable of reducing NOx, CO and HC emissions in diesel engine exhaust gas.
본 발명은 구리 및 망간 단독 또는 복합산화물을 포함하는 비귀금속성 입자물질 산화촉매조성물, 및 상기 산화촉매조성물이 담지된 디젤 입자물질 배기필터로 구성된다.The present invention comprises a non-noble metallic particulate matter oxidation catalyst composition comprising copper and manganese alone or a composite oxide, and a diesel particulate matter exhaust filter carrying the oxidation catalyst composition.
본 발명은 촉매조성물이 함침된 다공성 필터 기재를 포함하는 디젤 입자물질 배기필터에 디젤 배기가스를 통과시키는 것을 포함하는, 디젤 배기필터를 사용하여 디젤 배기가스로부터 입자물질을 제거하는 방법을 포함하며, 상기 비귀금속성 촉매조성물은 구리 및 망간 단독 또는 망간 복합산화물을 포함한다.The present invention includes a method for removing particulate matter from a diesel exhaust gas using a diesel exhaust filter, comprising passing diesel exhaust gas through a diesel particulate matter exhaust filter comprising a porous filter substrate impregnated with a catalyst composition. The non-noble metallic catalyst composition includes copper and manganese alone or manganese composite oxide.
균형점온도(BPT)는 디젤 배기가스 중 입자물질이 포집되는 양과 재생되는 양이 균형을 이루는 온도로 정의되며, 통상 소망되는 균형점온도는 300℃ 내외이다.The balance point temperature (BPT) is defined as the temperature at which the amount of particulate matter collected and recycled in the diesel exhaust gas is balanced, and a desired balance point temperature is about 300 ° C.
본 발명은 입자물질 산화촉매조성물 및 상기 조성물을 디젤 배기가스용 디젤 입자물질 배기필터에 적용하기 관한 것으로서, 상기 배기필터는 디젤엔진 배기가스 취급 시스템에 배치된다. 바람직하게는 고온 배기가스가 필터에 의해 생성, 포획된 입자물질을 연소시킴으로서 연속적으로 배기필터를 재생할 수 있도록, 배기필터는 엔진 배기다기관과 가능한 근접되도록 배치되며, 배기필터는 '존슨메씨'특허에서 언급된 DOC부 후단에 배치될 수도 있다.The present invention relates to the application of the particulate matter oxidation catalyst composition and the composition to a diesel particulate matter exhaust filter for diesel exhaust gas, the exhaust filter being disposed in a diesel engine exhaust gas handling system. Preferably, the exhaust filter is arranged to be as close as possible to the engine exhaust manifold so that the hot exhaust gas can continuously regenerate the exhaust filter by burning particulate matter generated and captured by the filter, and the exhaust filter has a 'Johnson M' patent. It may be placed after the DOC section mentioned in.
본 발명에서의 다공성 필터기재는 통상적인 필터용 제품, 예를들면 배기가스가 통과하여 여과될 수 있는, 얇고 다공성이며 벽이 있는 벌집, 모놀리스 또는 발포구조로 이루어지며, 통상적인 필터 재료, 예를들면 알루미나, 티타니아, 지르코니아, 보리아(boria), 코런덤(corundum), 실리카, 마그네시아, 실리카-알루미나, 티타니아-지르코니아, 티타니아-실리카, 실리콘카바이드, 티타니아 코팅된 알루미나, 산화텅스텐으로 코팅된 알루미나, 지르코니아로 코팅된 알루미나, 세라믹 코디어라이트, 뮬라이트 및 이들의 혼합물로 생성될 수 있으며, 특히, 세라믹 재료 및 실리콘 카바이드 재료로 제조된 기재가 바람직하다.The porous filter substrate in the present invention consists of a thin, porous, walled honeycomb, monolith or foamed structure which can be filtered through a conventional filter article, eg exhaust gas, and is a conventional filter material, eg For example, alumina, titania, zirconia, boria, corundum, silica, magnesia, silica-alumina, titania-zirconia, titania-silica, silicon carbide, titania-coated alumina, alumina coated with tungsten oxide , Alumina coated with zirconia, ceramic cordierite, mullite and mixtures thereof, and in particular, a substrate made of ceramic material and silicon carbide material is preferred.
상기 다공성 필터기재에 비귀금속성 촉매조성물이 침적된다. 본 발명에서 특징적 사항은 당업계에서 통상 필수적으로 요구된다고 인정된 귀금속은 포함되지 않으며, 구리 및 망간 단독 또는 복합산화물이, 당업계에서 통상적으로 채용되는 지지체, 예를들면 제올라이트, 알루미나, 실리카, 지르코니아 또는 마그네시아,에 함침되어 제안된다. 상기 구리산화물 및 망간산화물은 하기 구리화합물 및 망간화합물로부터 유래될 수 있다.A non-noble metallic catalyst composition is deposited on the porous filter substrate. Characteristic features in the present invention do not include precious metals that are generally recognized as necessary in the art, copper and manganese alone or composite oxides, such as zeolite, alumina, silica, zirconia Or impregnated with magnesia, is proposed. The copper oxide and manganese oxide may be derived from the following copper compound and manganese compound.
구리화합물로부터의 구리이온은 2가 또는 3가 일 수 있으며, 구리화합물은 구리질산염(copper nitrate), 구리염화물(copper chloride), 구리산화물(copper oxide), 구리황산염(copper sulfate), 구리옥살레이트(copper oxalate), 구리아세테이트(copper acetate), 구리탄산염(copper carbonate), 구리하이드록사이드(copper hydroxide), 암모늄구리염화물(ammonium copper chloride), 암모늄구리하이드록사이드(ammonium copper hydroxide) 또는 암모늄구리인산염(ammonium copper phosphate) 등이며, 바람직하게는 질산구리, 염화구리 또는 산화구리이다.The copper ions from the copper compound may be divalent or trivalent, and the copper compound may be copper nitrate, copper chloride, copper oxide, copper sulfate, copper oxalate. (copper oxalate), copper acetate, copper carbonate, copper hydroxide, ammonium copper chloride, ammonium copper hydroxide or ammonium copper hydroxide Ammonium copper phosphate and the like, preferably copper nitrate, copper chloride or copper oxide.
망간화합물은 망간염화물, 망간질산염, 망간황산염, 망간다이옥사이드(manganese dioxide), 망간인산염(manganese phosphate) 또는 망간옥살레이트(manganese oxalate) 등이다.Manganese compounds are manganese chloride, manganese nitrate, manganese sulfate, manganese dioxide, manganese phosphate or manganese oxalate.
상기 구리화합물 및 망간화합물간의 혼합비는 특별히 제한되지 아니하지만, 다공성 필터 기재상에 침적되는 구리 대 망간의 바람직한 비율은 원자비율로 Cu/Mn는 2 내지 0.5 이고, 모든 측정값은 필터 기재의 코팅 후 중량을 기준으로 한다.The mixing ratio between the copper compound and the manganese compound is not particularly limited, but the preferred ratio of copper to manganese deposited on the porous filter substrate is an atomic ratio of Cu / Mn of 2 to 0.5, and all measured values after coating of the filter substrate. Based on weight.
모놀리식 세라믹 재료 또는 실리콘 카바이드 재료와 같은 필터 기재의 벽에 대한 촉매조성물의 침착은 임의의 통상적인 방법으로 수행될 수 있다. 예를들면, 필터 기재를 촉매조성물로 함침시킬 수도 있고, 촉매조성물을 필터 기재상에 워시코팅시킬 수도 있다. 일반적으로, 필터 기재에 함침되는 촉매량은 필터기재 중량에 대하여 1-20 중량%, 바람직하게는 3-10 중량%이다.Deposition of the catalyst composition on the walls of the filter substrate, such as monolithic ceramic materials or silicon carbide materials, can be carried out in any conventional manner. For example, the filter substrate may be impregnated with the catalyst composition, and the catalyst composition may be wash coated onto the filter substrate. Generally, the amount of catalyst impregnated in the filter substrate is 1-20% by weight, preferably 3-10% by weight, based on the weight of the filter substrate.
본 발명의 촉매조성물을 적용하면, 귀금속을 사용하지 아니한 상태에서도 PM 연소온도는 300℃ 내외로 낮은 온도에서 일어난다. 전형적인 디젤엔진 배기가스는 엔진 작동동안 통상 상기 온도에 도달할 수 있으므로, 본 발명의 촉매조성물이 코팅된 필터의 부분적이거나 심지어 완전한 재생이 PM 연소와 동시에 정상 작동중에 일어날 수 있다. 상기 온도의 감소는 귀금속을 포함하지 않은 촉매조성물로서는 놀라운 결과이다.When the catalyst composition of the present invention is applied, the PM combustion temperature occurs at a low temperature of about 300 ° C. even when no noble metal is used. Typical diesel engine exhausts can typically reach this temperature during engine operation, so that partial or even complete regeneration of the catalyst composition coated filter of the present invention can occur during normal operation concurrent with PM combustion. The reduction in temperature is a surprising result for catalyst compositions that do not contain precious metals.
<실시예 1><Example 1>
Cu(NO2)23H2O 수용액 (171g, 86ml 증류수)을 예비하였고, 별도로 Mn(NO3)2nH2O 수용액 (102g, 406ml 증류수)를 예비하여, 고체산(solid acid) 지르코니아 수용액에 상기 수용액들을 혼합하여 지르코니아-함유 촉매조성 슬러리를 제조하였다. 실리콘 카바이드 필터 기재(3.5cmX3.5cmX5.2cm, 0.186L)에 와시코팅하여 150??에서 건조후, 공기중 2시간동안 600℃에서 하소하여 필터를 완성하였다. 이때 촉매조성물은 원자비율(atomic ratio)로 Cu/Mn/Zr = 1/2/7 로 조절되었다.Cu (NO 2 ) 2 3H 2 O aqueous solution (171 g, 86 ml distilled water) was prepared, and Mn (NO 3 ) 2 nH 2 O aqueous solution (102 g, 406 ml distilled water) was prepared separately, and a solid acid (zirconia) aqueous solution was prepared. The aqueous solutions were mixed to prepare a zirconia-containing catalyst composition slurry. The filter was completed by washing on a silicon carbide filter substrate (3.5 cm × 3.5 cm × 5.2 cm, 0.186 L), drying at 150 ° C., and calcining at 600 ° C. for 2 hours in air. At this time, the catalyst composition was adjusted to Cu / Mn / Zr = 1/2/7 by atomic ratio.
<실시예 2-4><Example 2-4>
Cu(NO2)23H2O 수용액 및 Mn(NO3)2nH2O 수용액 비율을 달리 조성한 것 외에 실시예 1과 동일하게 실시하여, 각각 Cu/Mn/Zr = 1/1/8, Cu/Mn/Zr = 2/1/7, Cu/Mn/Zr = 2/2/6를 완성하였다.Cu (NO 2 ) 2 3H 2 O aqueous solution and Mn (NO 3 ) 2 nH 2 O aqueous solution were prepared in the same manner as in Example 1, except that the ratios of Cu / Mn / Zr = 1/1/8 and Cu, respectively. / Mn / Zr = 2/1/7 and Cu / Mn / Zr = 2/2/6.
한편, 대조구로서 귀금속 Pt를 포함한 촉매조성 슬러리를 이용하여 필터를 제조하여 실시예와 비교하였다.On the other hand, the filter was prepared using a catalyst composition slurry containing a precious metal Pt as a control and compared with the Example.
상기 실시예들 및 대조구 필터 성능을 테스트하기 위하여, 배기가스 조성을 NO 500ppm, 분당유속 20-25L/m 으로 설정함과 동시에 PM 성분은 카본블랙(필터용적당 8g)으로 대체하여 각 필터의 PM 연소온도를 측정한 결과를 하기 표 1에 나타내었다.In order to test the above-described embodiments and control filter performance, the exhaust gas composition was set to 500 ppm NO and the flow rate 20-25 L / m, while the PM component was replaced with carbon black (8 g per filter volume) to burn PM of each filter. The results of measuring the temperature are shown in Table 1 below.
상기 표 1로부터, 본 발명에 의한 디젤 입자물질 배기필터는 귀금속을 포함하지 아니한 촉매조성물을 적용하여 PM 연소온도를 소망온도, 300℃내외까지 낮출 수 있었으며, 이는 무촉매 필터의 경우 PM 연소온도가 600℃인 것을 고려하거나, 또는 귀금속 Pt를 포함한 촉매조성물을 적용하는 경우의 PM 연소온도가 280℃인 것을 감안하면, 상당히 놀라운 효과라 할 수 있다.From the above Table 1, the diesel particulate matter exhaust filter according to the present invention was able to lower the PM combustion temperature to the desired temperature, around 300 ℃ by applying a catalyst composition that does not contain a noble metal, which is the PM combustion temperature in the case of the non-catalyst filter Considering that the temperature is 600 ° C. or when the PM combustion temperature when the catalyst composition containing the precious metal Pt is applied is 280 ° C., the effect can be quite surprising.
귀금속을 적용하지 아니한 본 발명에 의한 촉매조성물을 적용하여, 배기필터를 제작하는 경우 단가 및 작업효율성에서 상당한 경제적 기술적 효과를 얻을 것이며, 선택적으로 귀금속을 적용한 촉매조성물 및 본 발명에 의한 비귀금속 적용 촉매조성물과의 혼합물을 배기필터에 침적하는 경우 놀라운 기술적 효과를 기대할 수 있다.By applying the catalyst composition according to the present invention without applying a precious metal, a significant economic and technical effect will be obtained in the production cost and work efficiency when the exhaust filter is manufactured, and the catalyst composition using the precious metal optionally and the catalyst applying the non-noble metal according to the present invention A surprising technical effect can be expected when the mixture with the composition is deposited on the exhaust filter.
전술된 바와 같이, 본 발명에 따라 제조된 디젤 입자물질 배기필터를 사용하는 경우, 디젤차량 운전 중 필터내 포집된 입자물질을 연속적으로 재생시키고, 디젤엔진 배기가스 내의 CO, HC 및 NOx 배출량을 감소시킬 수 있을 뿐 아니라, 무엇보다도 귀금속을 사용하지 아니하고도 합리적인 온도에서 PM을 연소시킬 수 있어, 배기필터 분야에서 놀라운 기술적 진보를 가져올 수 있는 계기를 제공하고 있다.As described above, in the case of using the diesel particulate exhaust filter manufactured according to the present invention, the particulate matter trapped in the filter is continuously recycled during the operation of the diesel vehicle, and the CO, HC and NOx emissions in the diesel engine exhaust gas are reduced. Not only that, but also, above all, it is possible to burn PM at a reasonable temperature without using precious metal, thus providing an instrument that can bring amazing technological progress in the field of exhaust filter.
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| KR900015810A (en) * | 1989-04-17 | 1990-11-10 | 마우리치오 바리스꼬 | Catalytic Oxidation and Reduction Converter for Internal Combustion Engine Exhaust Gas |
| JP2005009454A (en) * | 2003-06-20 | 2005-01-13 | Tokyo Yogyo Co Ltd | Filter for purifying exhaust gas |
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| KR900015810A (en) * | 1989-04-17 | 1990-11-10 | 마우리치오 바리스꼬 | Catalytic Oxidation and Reduction Converter for Internal Combustion Engine Exhaust Gas |
| KR100473080B1 (en) | 2000-12-22 | 2005-03-08 | 한국전력기술 주식회사 | Method for Improving NOx Removal Efficiency from Flue Gas and Reducing Consumption of Ammonia and Emission of Nitrogen Dioxide Using Modified Natural Manganese Ores |
| JP2005009454A (en) * | 2003-06-20 | 2005-01-13 | Tokyo Yogyo Co Ltd | Filter for purifying exhaust gas |
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