Abstract:
본 발명은 희토류 금속을 함유하여 내열성이 향상된 팔라듐-로듐계 자동차용 촉매에 관한 것으로, 더욱 상세하게는 담체, 전술한 담체의 외표면에 형성되며, 팔라듐이 함유되는 제1코팅층 및 전술한 제1코팅층의 외표면에 형성되며, 로듐이 함유되는 제2코팅층을 포함하여 이루어진다. 본 발명에 따른 희토류 금속을 함유하여 내열성이 향상된 팔라듐-로듐계 자동차용 촉매는 조촉매로 종래에 사용되던 세륨, 지르코늄 이외에 란타늄, 네오듐 및 이트륨이 더 첨가되어 반응성 및 열적 내구성이 향상된다.
Abstract:
본 발명은 Pd 용액을 제1지지물질에 고착시켜 Pd 분말을 제조하는 제1단계와; 상기 제1단계에서 제조된 Pd 분말에 Pt 용액을 고착시켜 Pt/Pd계 프리믹스된 분말을 제조하는 제2단계와; 상기 제2단계에서 제조된 Pt/Pd계 프리믹스된 분말 및 Pt 용액을 제2지지물질에 고착시켜 슬러리를 제조하는 제3단계를 포함하는 CNG 자동차의 배기가스 정화용 촉매의 제조방법에 관한 것이며, 상세하게는 상기 Pt 용액은 Pt(NO 3 ) 3 또는 Pt(OH) 6 을 포함하는 것을 특징으로 하고, 보다 상세하게는 상기 Pd 용액은 Pd-Nitrate 용액을 포함하는 것을 특징으로 하는 CNG 자동차 배기가스 정화용 촉매의 제조방법에 관한 것이다. 또한 본 발명은 제1지지물질에 고착된 Pd 분말에 Pt가 고착된 Pt/Pd계 프리믹스된 분말 및 제2지지물질을 촉매성분으로서 포함하는 것을 특징으로 하는 CNG 자동차 배기가스 정화용 촉매에 관한 것으로서, 본 발명에 따른 Pt/Pd계 프리믹스된 분말 및 Pt(NO 3 ) 3 용액 또는 Pt(OH) 6 용액을 사용함으로써 원가를 절감할 수 있고 열적 내구성 향상을 통해 촉매 활성을 증대시킬 수 있다. 압축천연가스, CNG, 촉매, Pt, Pd
Abstract:
PURPOSE: Catalyst for purifying exhaust gas of compressed natural gas vehicles and a method for preparing the same are provided to minimize the growth of precious metal particles due to the thermal aging phenomenon of precious metal by increasing distances between the precious metals. CONSTITUTION: Pd powder is prepared by fixing a Pd solution to a carrying material. A Pt solution is fixed to the Pd powder in order to prepare Pt/Pd-based pre-mixed powder. The Pt solution includes either or both of a Pt(NO_3)_3 solution or/and a Pt(OH)_6 solution. The Pt/Pd-based pre-mixed powder and the Pt solution are fixed to a carrying material to prepare slurry. Nitrogen is added. A wash-coat is prepared based on the slurry and is coated with a carrier.
Abstract:
PURPOSE: A preparation method of patinium powder for a catalyst is provided to improve dispersibility and catalyst activation by forming particles with a size of approximately 2~5nm. CONSTITUTION: A preparation method of patinium powder for a catalyst comprises the steps of: distributing a solid carrier and pouring a platinum solution on the carrier so that nano sized platinum particles are fixed on the solid carrier and drying and plasticizing the platinum solution. The platinum solution is selected from the group consisting of Ptx, PtClx and Pt_6. The support element is selected from the group consisting of Al_2O_3, SiO_2, TiO_2, CeO_2, and ZiO_2. The plasticizing temperature is 300~500°C.
Abstract:
A method for preparing an oxidizing catalyst for a diesel vehicle is provided to improve the performance in purification of CO and HC, by mixing vanadium and platinum into binders separately. An oxidizing catalyst is prepared by mixing V2O5 into a first binder, hardening the mixture of V2O5 and the first binder, mixing other binders and a platinum solution into the hardened mixture to regulate a pH value, pulverizing the resultant mixture, and coating and hardening the pulverized matters on a supporter. The first binder is titan dioxide, and the second binder is titan dioxide and alumina. Further, the pH is adjust to 4-5, and the hardening is performed at 500°C for 4 hrs.
Abstract translation:提供了制备用于柴油车辆的氧化催化剂的方法,以通过将钒和铂分别混合到粘合剂中来改善CO和HC的净化性能。 通过将V 2 O 5混合到第一粘合剂中,使V 2 O 5和第一粘合剂的混合物硬化,将其它粘合剂和铂溶液混合到硬化的混合物中以调节pH值,粉碎所得混合物,并涂覆和硬化 粉碎物在支持者身上。 第一粘合剂是二氧化钛,第二粘合剂是二氧化钛和氧化铝。 此外,pH调节至4-5,硬化在500℃下进行4小时。
Abstract:
The present invention relates to a pre-treatment method for the synthesis of an electrode catalyst. More specifically, the method comprises a mixing step of mixing a carrier and a solvent; a homogenizing step of homogenizing the particle size of the mixture mixed through the mixing step; a dispersing step of dispersing the mixture homogenized through the homogenizing step; and an analyzing step of analyzing the particle size of the mixture dispersed through the dispersing step.
Abstract:
PURPOSE: A manufacturing method of a catalyst for fuel cells is provided to replace a platinum catalyst with palladium with low costs, thereby reducing manufacturing costs of catalysts while maintaining performance of the platinum catalyst. CONSTITUTION: A manufacturing method of a catalyst for fuel cells comprises a step of manufacturing a platinum-palladium synthesis precursor; a step of manufacturing the catalyst for fuel cells. The first step comprises a step of reacting palladium and acetic acid to prepare palladium-acetate; a step of reacting gold and amine-based organic materials, to manufacture platinum-amide; and a step of mixing the palladium-acetate and platinum-amide. [Reference numerals] (AA) Start; (BB) Carbon pre-treatment step; (CC) Precursor dispersion step; (DD) Stabilization step; (EE) Filtration and washing step; (FF) Drying step; (GG) End
Abstract:
본 발명은 비대칭 구조를 갖는 팔라듐계 가솔린 자동차용 촉매 및 그 제조방법에 관한 것으로, 더욱 상세하게는 담체, 전술한 담체의 외표면에 형성되는 제1코팅층 및 전술한 제1코팅층의 외표면에 형성되는 제2코팅층으로 이루어지며, 담체의 외표면에 제1코팅액을 도포하는 제1코팅단계, 전술한 제1코팅액 도포된 담체의 외표면에 제2코팅액을 도포하는 제2코팅단계 및 전술한 제2코팅액이 도포된 담체를 80 내지 120℃의 온도로 가열하여 수분을 제거하는 건조단계 및 전술한 건조단계를 거친 담체를 500 내지 600℃의 온도로 가열하여 소성하는 소성단계를 통해 제조된다.
Abstract:
PURPOSE: A palladium catalyst with the optimized particle sizes of noble metals is provided to improve the initial purifying efficiency of the catalyst after deterioration by optimizing interaction between aluminum oxide and noble metals. CONSTITUTION: A palladium catalyst includes a carrier(10), a first coating layer(20), and a second coating layer(30). The first coating layer is formed at the outer surface of the carrier. The first coating layer includes barium oxide and palladium. The second coating layer is formed at the outer surface of the first coating layer. The second coating layer includes barium oxide and palladium. The thickness of the first coating layer is between 100 and 110 g/L. The thickness of the second coating layer is between 130 and 140 g/L.
Abstract:
PURPOSE: The palladium-based catalyst of an asymmetric structure for gasoline vehicles and a method for manufacturing the same are provided to improve the efficiency of purification by asymmetrically forming two coating layers with different coating component contents on the surface of a carrier. CONSTITUTION: The palladium-based catalyst of an asymmetric structure for gasoline vehicles includes a carrier, a first coating layer formed on the outer surface of the carrier, and a second coating layer formed on the outer surface of the first coating layer(S101, S103). The first coating layer includes 70-71 parts by weight of aluminum, 4-4.5 parts by weight of strontium oxide, 24-25 parts by weight of cerium oxide, and 0.5-1 parts by weight of palladium. The second coating layer includes 54-55 parts by weight of aluminum, 10-11 parts by weight of strontium oxide, 32-33 parts by weight of cerium oxide, and 2-2.5 parts by weight of palladium. A drying process and a plasticizing process are implemented(S105, S107).