Patent
Removal of nitrogen oxide from exhaust gas
Mitsunori Tabata,Masaaki Kawatsuki,Katsumi Miyamoto,Hiroshi Tsuchida,Tomohiro Yoshinari,Kazushi Usui,Fujio Suganuma,Tadao Nakatsuji,Hiromitsu Shimizu,Ritsu Yasukawa,Hamada Hideaki,Ito Takehiko,Yoshiaki Kintaichi,Motoi Sasaki +13 more
TLDR
In this paper, a process for removing nitrogen oxide from exhaust is disclosed, comprising contacting exhaust containing nitrogen oxide with an alumina catalyst which contains not more than 0.5% by weight of an alkali metal and/or an alkaline earth metal.Abstract:
A process for removing nitrogen oxide from exhaust is disclosed, comprising contacting exhaust containing nitrogen oxide with an alumina catalyst which contains not more than 0.5% by weight of an alkali metal and/or an alkaline earth metal and has a total pore volume of from 0.48 to 1.2 cm 3 ·g -1 with 0.26 to 0.6 cm 3 ·g -1 of the total pore volume being formed of pores of not greater than 80 Å or has a volume of pores formed of pores of not greater than 60 Å of from 0.06 to 0.2 cm 3 ·g -l and which may have supported thereon tin in an oxidative atmosphere containing excess oxygen in the presence of a hydrocarbon or an oxygen-containing organic compound.read more
Citations
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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.
Patent
Exhaust gas purifying catalyst
TL;DR: In this paper, an exhaust gas purifying catalyst is provided, which comprises a porous silica support comprising silica having a pore structure, and a perovskite-type composite metal oxide particle supported in the pore structures of the porous support.
Patent
Layered diesel oxidation catalyst composites
Shahjahan M. Kazi,Michel Deeba,Torsten Neubauer,Helmut Alfred Punke,Wolfgang Torsten Mueller-Stach,Gerd Grubert,A. Stanley Roth,Barmont Jeffrey Hoke,Shiang Sung,Yuejin Li,Xinyi Wei,Chung-Zong Wan +11 more
TL;DR: In this article, the authors provided a method for separating diesel exhaust components where palladium is segregated from a molecular sieve, specifically a zeolite, in a catalytic material.
Patent
Molecular sieve catalyst compositions, catalyst composites, systems, and methods
Xiaofan Yang,John K. Hochmuth,Wen-Mei Xue,Xiaoming Wang,Matthew Caudle,Ahmad Moini,Dustin O. Hollobaugh,Qi Fu,Michael Breen +8 more
TL;DR: In this article, a selective catalytic reduction material comprising a spherical particle including an agglomeration of crystals of a molecular sieve is described, and a method for selectively reducing nitrogen oxides and an exhaust gas treatment system is also described.
Patent
Low-emissions diesel fuel blend
TL;DR: In this article, a low-emissions diesel fuel comprises a catalyzed blend of fatty acid esters, preferably derived from soybean oil and/or tallow and aviation kerosene.
References
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Patent
Catalysts for selective catalytic reduction denox technology
TL;DR: In this article, a support for selective catalytic reduction of NOx by ammonia is made from porous formed supports having a certain fraction of the pores having pore diameters larger than 600 Angstrom units, and macropores are introduced in a formed TiO₂ support by adding burnout materials or some inorganic oxide prior to forming the titania into the formed support.
Patent
Alumina coating compositions for catalyst supports and process for their formulation
TL;DR: Aqueous alumina coating compositions well adopted for directly impregnating/coating both ceramic and metallic catalyst supports to provide integral, both macroporous and microporous coatings therefor, which coated supports are useful for the fabrication of a wide variety of catalysts for catalyzing a broad spectrum of reactions, including those characterized by highly limited internal diffusion or by progressive catalyst poisoning as discussed by the authors.
Patent
Process for removing nitrogen oxides in exhaust gases to nitrogen
TL;DR: In this paper, a process for reducing nitrogen oxides to nitrogen from exhaust gases is described, which involves bringing an exhaust gas containing nitrogen oxide into contact with at least one catalyst from proton-type zeolites, including metal oxides, by reaction with a hydrocarbon or an oxygen-containing organic compound in an oxidizing atmosphere containing excess oxygen.
Patent
Monolith washcoat having optimum pore structure and optimum method of designing the washcoat
TL;DR: In this paper, an optimum washcoated ceramic monolith for treating automotive exhaust gases is made by specifying the reactants, process conditions and desired time on stream; determining from the parameters in step (a) the pore size distribution and thickness of the washcoat to produce the desired auto exhaust conversion; preparing a washcoat catalyst with an alumina having the desired pore sizes distribution; and applying the prepared washedcoat catalyst to a ceramic or metal monolith to produce a finished automotive exhaust gas catalyst.
Patent
Vehicle exhaust gas systems
TL;DR: In this paper, 2.2-way and 3-way catalyst compositions comprising tin (IV) oxide (SnO2) and chromium (VI) oxide(CrO3) for use in catalytic converters for vehicle exhaust gas systems, such catalyst compositions being effective in the catalytic oxydation of carbon monoxide and unburnt hydrocarbons, and in the reduction of nitrogen oxides contained in the vehicle exhaust.