Patent
Catalyst for lowering the amount of nitrogen oxides in the exhaust gas from lean burn engines
TLDR
In this article, the authors proposed a catalyst for reducing the amount of NO x in the lean exhaust gas from lean burn engines, comprising active aluminum oxide, magnesium oxide, and at least one noble metal of the platinum group of the periodic table of the elements.Abstract:
The invention relates to a catalyst for lowering the amount of NO x in the lean exhaust gas from lean burn engines, comprising active aluminum oxide, magnesium oxide and at least one noble metal of the platinum group of the periodic table of the elements, as well as at least one nitrogen oxide storage material. The catalyst is characterized in that the magnesium oxide forms a homogeneous mixed oxide with aluminum oxide and is present in a concentration of about 1 to about 40 wt- %, based on the total weight of the mixed oxide.read more
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Nitrogen oxide storage material and nitrogen oxide storage catalyst produced therefrom
TL;DR: In this paper, a nitrogen oxide storage material based on storage compounds of elements selected from the group consisting of magnesium, calcium, strontium, barium, the alkali metals, the rare earth metals and mixtures thereof is described.
Patent
Catalyst for gasoline lean burn engines with improved NO oxidation activity
TL;DR: In this paper, a method for the production of a catalyst and a process for the treatment of a gas stream comprising nitrogen oxide, in particular of an exhaust gas stream resulting from an internal combustion engine, is described.
Patent
Nox storage materials and traps resistant to thermal aging
TL;DR: In this paper, the nitrogen oxide storage materials can be used to manufacture catalytic trap disposed in an exhaust passage of an internal combustion engine which is operated periodically between lean and stoichiometric or rich conditions.
Patent
NOx ABSORBER CATALYSTS
Ralf Dotzel,Rainer Leppelt,Elizabeth Hazel Mountstevens,Jörg Werner Münch,Paul Richard Phillips,Hubert Schedel,Daniel Swallow +6 more
TL;DR: In this paper, a NOx absorber catalyst comprising a substrate monolith coated with one or more washcoat layers and comprising a first component comprising a nitrogen oxide storage component, at least one precious metal and a dispersed rare earth oxide supported on a refractory support material, and a second component comprising an oxide, a composite oxide or a mixed oxide that is substantially free of nitrogen oxide is presented.
Patent
Spinel compositions and applications thereof
TL;DR: In this paper, a general formula of AB2O4 for spinels having a general transition metal, where A and B are a transition metal but not the same transition metal are disclosed.
References
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Patent
Catalyst for purifying exhaust gas and the process for manufacturing thereof
TL;DR: In this paper, a spinel spinel metal oxide is used as a catalyst for purifying exhaust gas composed of a catalyst carrier coated with a metal oxide material containing a spinels metal oxide of the formula: MAl 2 O 4 wherein M is Sr, Mg, Cu, Mn, Mo, Zn, Fe, Co or Ni.
Patent
Nitrogen oxide storage material and nitrogen oxide storage catalyst produced therefrom
TL;DR: In this paper, a nitrogen oxide storage material based on storage compounds of elements selected from the group consisting of magnesium, calcium, strontium, barium, the alkali metals, the rare earth metals and mixtures thereof is described.
Patent
New catalyst, and processes for dehydrogenating dehydrogenatable hydrocarbons
TL;DR: In this paper, a new catalyst was proposed for the dehydrogenation of C2-30 hydrocarbons, which comprises a carrier consisting essentially of a mixed oxide of magnesium and alumina Mg(Al)O, and also comprises a Group VIII noble metal, a Group IVA metal and optionally a Group IA alkali metal.
Patent
Storage material for sulfur oxides
TL;DR: In this article, a storage material for sulfur oxides that contains a magnesium-aluminum spinel (MgO-Al2O3) and can be used as a so-called sulfur trap to remove sulfur oxide from oxygen-containing exhaust gases of industrial processes is presented.
Patent
Nitrogen oxide storage material and nitrogen oxide storage catalyst prepared therefrom, process for its preparation and use thereof
TL;DR: In this paper, the carrier material is selected from a group doping/donating cerium oxide, cerium/zircon-mixed oxide, calcium titanate, strontium titanate and barium stannate.