Abstract:
A catalyst composition contains a perovskite composite oxide of the type expressed by a rational formula ABO3, wherein A consists of two types of constituent elements of Anull and Anull and B consists of two types of constituent elements of Bnull and Bnull, and the perovskite composite oxide is expressed by a general formula Anull1-xAnullxBnull1-yBnullyO3. The Anull is La or Ce, the Anull is at least one element selected from the group consisting of La, Ca, Sm, Ce, Sr, Ba and Pr, the Bnull is at least one type element selected from the group consisting of Co, Fe, Mn and Gd, and the Bnull is any one type of a noble metal such as Ru, Rh, Pd, Pt, or the like. This catalyst composition can be employed as a reforming catalyst of the alcohol or the hydrocarbon-based gas to produce hydrogen gas for a fuel cell, or as an electrode catalyst.
Abstract:
A catalyst-adsorbent for purification of exhaust gases, comprising a monolithic carrier and a catalyst-adsorbent layer formed thereon, the catalyst-adsorbent layer comprising a catalyst for reduction of the carbon monoxide, hydrocarbons and nitrogen oxides emitted from internal combustion engines and an adsorbent for reduction of the hydrocarbons emitted during the cold start of said engines, the catalyst being composed mainly of catalyst particles each comprising a heat-resistant inorganic oxide and at least one noble metal selected from Pt, Pd and Rh, loaded thereon, the catalyst containing at least catalyst particles each comprising a heat-resistant inorganic oxide and 2-30% by weight, based on said oxide, of Pd loaded thereon, the adsorbent comprising adsorbent particles composed mainly of zeolite.
Abstract:
The present invention provides catalysts, reactors, and methods of steam reforming alcohols over a catalyst. Surprisingly superior results and properties obtained in methods and catalysts of the present invention are also described.
Abstract:
A device for the selective catalytic oxidation of carbon monoxide contained in a hydrogenous gas mixture flow includes at least one CO oxidation stage having at least one inlet opening for feeding oxidizing gas to the gas mixture flow. At least one flow-through body containing a catalyst is arranged in the gas mixture flow in the CO oxidation stage. The flow-through body fills a flow-through cross section of the gas mixture flow in the CO oxidation stage. The device also contains means for pre-setting the temperature of the body as a function of the load.
Abstract:
An exhaust-gas-purifying catalyst is made by depositing on a support iridium serving as a catalyst active substance, sulfur for improving the catalyst activity of iridium and, if necessary, platinum. The sulfur is preferably contained as a sulfate. The exhaust-gas-purifying process of the present invention is a process in which exhaust gas from an internal combustion engine is allowed to pass through the exhaust-gas-purifying catalyst with the exhaust-gas temperature being set in the range of 200null C. to 700null C. at the inlet of the exhaust-gas-purifying catalyst. The above-mentioned composition and process provide an activity for purifying exhaust gas, especially for eliminating nitrogen oxides in an oxidizing atmosphere, in a wide temperature range, allow high heat-resistance and durability, and consequently, are superior in practical use.
Abstract:
The invention relates to a process for the selective catalytic reduction of the nitrogen oxides contained in a lean exhaust gas from internal combustion engines by reducing the nitrogen oxides by means of ammonia on a catalyst. The process is characterized in that, in addition to the lean exhaust gas, a rich gas stream is produced that is treated in an electrical gas discharge plasma in order to form the ammonia required for the reduction.
Abstract:
A fuel reformer for use with a fuel cell system is combined with an absorber to absorb unreacted hydrocarbon fuel at a first temperature and release the unreacted hydrocarbon fuel at a second temperature, and subsequent burning of the unreacted hydrocarbon in a burner downstream. The absorber, such as a zeolite, is effective to increase efficiency of the reformer and fuel cell especially under low temperature or start-up conditions.
Abstract:
A catalyst, a method for producing the same, and a method for treating an exhaust gas are described. The catalyst comprises an oxide containing titanium, vanadium, phosphorus and oxygen. The method of producing a catalyst, comprises the steps of: (i) spinning a spinning liquid comprising an organic solvent, vanadium, phosphorus and a polymer of a titanium compound, to obtain a precursor, (ii) calcining the precursor. The method of treating an exhaust gas comprises a step of contacting an exhaust gas with the catalyst.
Abstract:
An object of the present invention is to provide a chemical decontamination liquid decomposing system having a catalyst tower which has a mesh filter capable of certainly preventing catalyst from flowing out and a mechanism of pushing-down the catalyst capable of preventing convection of the catalyst caused by decomposition gas. The catalyst tower in accordance with the present invention used for decomposing a chemical decontamination liquid comprises an inlet pipe, a catalyst for decomposing the chemical decontamination liquid, an outlet mesh filter for preventing the catalyst from flowing out, an outlet pipe, a catalyst charging port for charging the catalyst, a catalyst pushing-down mechanism for preventing occurrence of convection of the catalyst caused by a decomposed gas and so on. The outlet mesh filter is arranged so as to closely attached to the inner surface of the catalyst tower and to the inner surface of the catalyst charging port.
Abstract:
A methanation reactor to reduce carbon monoxide concentration in a reformate stream. The reactor includes a noble metal catalyst supported by a ceramic support such that the reactor preferentially converts of carbon monoxide via methanation over that of carbon dioxide. In one embodiment, the ceramic support is alumina with a coating of silica deposited on the alumina to increase the support surface acidity and consequent carbon monoxide conversion. The purpose of the abstract is to enable the United States Patent and Trademark Office and the public generally to determine from a cursory inspection the nature and gist of the technical disclosure, and is not to be used for interpreting the scope of the claims.