Patent
Catalyst for purification of exhaust gases
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TLDR
In this article, a support substrate, a catalyst carrier layer formed on the support substrate and catalyst ingredients loaded on the carrier layer, wherein the catalyst carrier consists of alumina, cerium oxide, zirconium oxide and at least one oxide of rare earth element except cerium and lanthanum.Abstract:
A catalyst for purification of exhaust gases, comprising a support substrate, a catalyst carrier layer formed on the support substrate and catalyst ingredients loaded on the catalyst carrier layer, wherein the catalyst carrier layer comprises alumina, cerium oxide, zirconium oxide and at least one oxide of rare earth element except cerium and lanthanum, and at least a part of cerium oxide, zirconium oxide and oxide of rare earth element except cerium and lanthanum is present in the form of composite oxide and/or solid solution. The catalyst for purification of exhaust gases is capable of purifying exhaust gases containing carbon monoxide (CO), hydrocarbons (HC) and nitrogen oxides (NOx).read more
Citations
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Transition metal/zeolite scr catalysts
Paul Joseph Andersen,Jillian Elaine Bailie,John Leonello Casci,Hai-Ying Chen,Joseph Fedeyko,Rodney Kok Shin Foo,Raj Rao Rajaram +6 more
TL;DR: In this article, a method of converting nitrogen oxides in a gas to nitrogen was proposed by using a nitrogenous reducing agent in the presence of a zeolite catalyst containing at least one transition metal, where the catalysts were selected from the group consisting of Cr, Mn, Fe, Co, Ce, Ni, Cu, Zn, Ga, Mo, Ru, Rh, Pd, Ag, In, Sn, Re, Ir and Pt.
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Ivor Bull,Wen-Mei Xue,Patrick Burk,R. Samuel Boorse,William M. Jaglowski,Gerald S. Koermer,Ahmad Moini,Joseph A. Patchett,Joseph C. Dettling,Matthew Caudle +9 more
TL;DR: In this article, the CHA crystal structure of zeolite catalysts has been described and a method for preparing and using them has been presented, which can be used to remove nitrogen oxides from a gaseous medium across a broad temperature range and exhibit hydrothermal stable at high reaction temperatures.
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TL;DR: In this article, a layered catalyst composite of the type generally referred to as a three-way conversion catalyst having the capability of substantially simultaneously catalyzing the oxidation of hydrocarbons and carbon monoxide and the reduction of nitrogen oxides was designed wherein there is a first layer and a second layer.
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Exhaust gas purifying catalyst
TL;DR: An exhaust gas-purifying catalyst includes a substrate, and a catalytic layer formed on the substrate using slurry containing a precious metal, alumina, an oxygen storage material and a sulfate of an alkaline-earth metal having an average particle diameter falling within a range of 0.01 to 0.70 μm, the average particle size being obtained by observation using a scanning electron microscope as mentioned in this paper.
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Novel microporous crystalline material comprising a molecular sieve or zeolite having an 8-ring pore opening structure and methods of making and using same
TL;DR: In this paper, the authors disclosed a hydrothermally stable microporous crystalline material comprising a molecular sieve or zeolite having an 8-ring pore opening structure.
References
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Three-way catalytic process for gaseous streams
TL;DR: In this article, a process for catalytic combustion of carbon monoxide and hydrocarbons and the catalytic reduction of the oxides of nitrogen contained in a gas stream is described.
PatentDOI
Catalytic reduction of nitrogen oxides
TL;DR: In this article, the authors proposed a method for catalytically reducing one or more nitrogen oxides from a gaseous stream, where the microporous molecular sieve composition is (i) optionally acid treated with an inorganic or organic acid, (ii) hydrogen-forming cation exchanged, prior to said contacting in said method, and wherein at least a portion of excessive ammonia in such a method is oxidized without substantial adverse effect on catalytic reduction.
Patent
Process for producing honeycomb catalyst for exhaust gas conversion
TL;DR: In this paper, a process for producing a high-temperature resistant honeycomb catalyst is described, which comprises admixing cerium, zirconium, at least one metal selected from the group consisting of iron and nickel, and optionally at least another metal from the groups consisting of platinum, palladium and rhodium, each in the form of an aqueous solution or dispersion of a soluble or easily water-dispersible compound of the metal.
Patent
Catalyst for the purification of exhaust gases of internal combustion engines
TL;DR: In this paper, a catalyst of active aluminium oxides with admixture of CeO2, ZrO2 and Fe2O3 and/or NiO as support and, coated thereon, an active phase of platinum, palladium and rhodium and a base metal is presented.
Patent
Hydrocracking catalysts and processes employing non-zeolitic molecular sieves
Frank Peter Gortsema,Regis Joseph Pellet,Albert Raymond Springer,Jule Anthony Rabo,Gary Norman Long +4 more
TL;DR: The products of the instant processes are characterized by higher i-paraffin to n-parafin ratios as discussed by the authors. But they are not suitable for use with non-zeolitic molecular sieves such as the silicoaluminophosphates.
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