Abstract: An organic waste recycling apparatus comprises: a catalyst for making the carbonization of an organic waste targeted for waste disposal; a UV irradiation member for irradiating UV at a wavelength capable of breaking a bond in a molecule constituting the organic waste; a processed object housing member whereof the interior space houses the catalyst; a heating member provided in the interior space; and a stirring member provided in the interior space. The organic waste is one that has undergone crushing into small pieces. The processed object housing member is such that the catalyst and the organic waste that has been UV-irradiated by the UV irradiation member and introduced into the interior space are in contact with one another and stirrable in this state by the stirring member.

Abstract: A catalyst for use in a process for purifying exhaust gas from a gasoline engine of the fuel-direct-injection type that varies, in response to changes in the air-fuel ratio, between a first exhaust-gas state featured by an air-fuel ratio in the vicinity of the stoichiometrical air-fuel ratio, and a second exhaust-gas state that forms a more oxidizing, low-temperature atmosphere and that is featured by an air-fuel ratio greater than the stoichiometrical air-fuel ratio, the catalyst being obtained by causing a noble metal and a rare-earth oxide and/or a transition metal to be carried by or to be mixed with a fire-resistant inorganic oxide.

Abstract: A method of purifying an exhaust gas, includes: disposing a NOx trapping catalyst in an exhaust pipe of an internal combustion engine, the NOx trapping catalyst including: a metal substrate including cells, a corner portion of each of cells having an acute angle; and a catalyst layer supported in the metal substrate and including a noble metal, a heat-resistant inorganic oxide and a NOx trapping material, the catalyst layer having pores formed by addition of a pore formation promoting material, and the NOx trapping catalyst: adsorbing NOx in the exhaust gas when an exhaust air-fuel ratio is in a lean state; and desorbing and reducing the adsorbed NOx when the exhaust air-fuel ratio is in a stoichiometric state or a rich state; and removing the NOx by the exhaust air-fuel ratio being shifted between the lean state and the rich state.

Abstract: A catalyst for the purification of exhaust gas that can be used to highly efficiently treat an exhaust gas which has moisture and fluctuates between an oxidizing atmosphere and a reducing atmosphere even after the catalyst is exposed to a high temperature is provided. The present invention relates to a catalyst for the purification of exhaust gas having a catalyst layer of catalyst components comprising a noble metal, magnesium oxide, and a refractory inorganic oxide formed on a three-dimensional structure, wherein the catalyst layer has two peaks originated from the magnesium oxide in a pore distribution obtained by mercury intrusion technique.

Abstract: A catalyst for use in a process for purifying exhaust gas from a gasoline engine of the fuel-direct-injection type that varies, in response to changes in the air-fuel ratio, between a first exhaust-gas state featured by an air-fuel ratio in the vicinity of the stoichiometrical air-fuel ratio, and a second exhaust-gas state that forms a more oxidizing, low-temperature atmosphere and that is featured by an air-fuel ratio greater than the stoichiometrical air-fuel ratio, the catalyst being obtained by causing a noble metal and a rare-earth oxide and/or a transition metal to be carried by or to be mixed with a fire-resistant inorganic oxide.

Abstract: The present invention provides a catalyst which can sufficiently remove nitrogen oxides in an exhaust gas. The catalyst for removing nitrogen oxides to achieve an object of the present invention includes a monolithic support which is coated with a lower layer containing a catalytic component A comprising cerium oxide and an upper layer containing a catalytic component B comprising at least one kind of metal selected from a group consisting of copper, manganese, iron, cobalt and nickel or a compound thereof, and zeolite.

Abstract: An exhaust gas purifying catalyst which is disposed in an exhaust pipe of an internal combustion engine, includes: a substrate; and a catalyst layer, supported in the substrate and including: noble metals including platinum (Pt) and palladium (Pd); a heat-resistant inorganic oxide; and a NOx trapping material. The exhaust gas purifying catalyst adsorbs NOx in an exhaust gas when an exhaust air-fuel ratio is in a lean state and desorbs and reduces the adsorbed NOx when the exhaust air-fuel ratio is in a stoichiometric state or a rich state. (Pt/Pd) which is a ratio of amount of the platinum (Pt) to amount of the palladium (Pd) is 0.7 or more and less than 1.0.

Abstract: A catalyst for the purification of exhaust gas that can be used to highly efficiently treat an exhaust gas which has moisture and fluctuates between an oxidizing atmosphere and a reducing atmosphere even after the catalyst is exposed to a high temperature is provided. The present invention relates to a catalyst for the purification of exhaust gas having a catalyst layer of catalyst components comprising a noble metal, magnesium oxide, and a refractory inorganic oxide formed on a three-dimensional structure, wherein the catalyst layer has two peaks originated from the magnesium oxide in a pore distribution obtained by mercury intrusion technique.

Abstract: A catalyst for exhaust gas purification of the present invention contains the thin-plate-like ceria (CeO2) as a catalytic active component. According to the catalyst for exhaust gas purification of the present invention, among CO, HC, and NOx, which are hazardous components contained in exhaust gas, particularly, NOx, can be removed efficiently. The present invention can be used as, what is called a NOx trapping catalyst, which stores NOx in oxidizing atmosphere, and discharges and reduces NOx in reducing atmosphere.

Abstract: An object of the present invention is to improve hydrocarbon adsorbing property when zeolite is used as an adsorbent for hydrocarbons. The present invention provides an adsorbent for hydrocarbons characterized by comprising A Type of ?-zeolite having a SiO2/Al2O3 ratio (molar ratio) in a range of 10 or more and less than 200 and B Type of ?-zeolite having a SiO2/Al2O3 ratio (molar ratio) in a range from 200 to 1,000, and a catalyst for exhaust gas purification containing said adsorbent for hydrocarbons.

Abstract: The present invention provides a catalyst which can sufficiently remove nitrogen oxides in an exhaust gas. The catalyst for removing nitrogen oxides to achieve an object of the present invention includes a monolithic support which is coated with a lower layer containing a catalytic component A comprising cerium oxide and an upper layer containing a catalytic component B comprising at least one kind of metal selected from a group consisting of copper, manganese, iron, cobalt and nickel or a compound thereof, and zeolite.

Abstract: An exhaust gas purifying catalyst which is disposed in an exhaust pipe of an internal combustion engine, includes: a substrate; and a catalyst layer, supported in the substrate and including: noble metals including platinum (Pt) and palladium (Pd); a heat-resistant inorganic oxide; and a NOx trapping material. The exhaust gas purifying catalyst adsorbs NOx in an exhaust gase when an exhaust air-fuel ratio is in a lean state and desorbs and reduces the adsorbed NOx when the exhaust air-fuel ratio is in a stoichiometric state or a rich state. (Pt/Pd) which is a ratio of amount of the platinum (Pt) to amount of the palladium (Pd) is 0.7 or more and less than 1.0.

Abstract: A method of purifying an exhaust gas, includes: disposing a NOx trapping catalyst in an exhaust pipe of an internal combustion engine, the NOx trapping catalyst including: a metal substrate including cells, a corner portion of each of cells having an acute angle; and a catalyst layer supported in the metal substrate and including a noble metal, a heat-resistant inorganic oxide and a NOx trapping material, the catalyst layer having pores formed by addition of a pore formation promoting material, and the NOx trapping catalyst: adsorbing NOx in the exhaust gas when an exhaust air-fuel ratio is in a lean state; and desorbing and reducing the adsorbed NOx when the exhaust air-fuel ratio is in a stoichiometric state or a rich state; and removing the NOx by the exhaust air-fuel ratio being shifted between the lean state and the rich state.

Abstract: An object of the present invention is to improve hydrocarbon adsorbing property when zeolite is used as an adsorbent for hydrocarbons. The present invention provides an adsorbent for hydrocarbons characterized by comprising A Type of ?-zeolite having a SiO2/Al2O3 ratio (molar ratio) in a range of 10 or more and less than 200 and B Type of ?-zeolite having a SiO2/Al2O3 ratio (molar ratio) in a range from 200 to 1,000, and a catalyst for exhaust gas purification containing said adsorbent for hydrocarbons.

Abstract: A three-way catalyst (30) comprises a microporous catalyst element (30a) having a micropore group whose average pore opening size is smaller than molecular size of HC in a washcoat and a macroporous catalyst element (30b) having a macropore group whose average pore opening size is larger than the molecular size of HC in a washcoat.

Abstract: A process for purifying exhaust gas from a gasoline engine of the fuel-direct-injection type purifies exhaust gas that varies, in response to changes in the air-fuel ratio, between the first exhaust-gas state featured by an air-fuel ratio in the vicinity of the stoichiometrical air-fuel ratio and the second exhaust-gas state that forms a more oxidizing, low-temperature atmosphere and that is featured by an air-fuel ratio greater than the stoichiometrical air-fuel ratio, by using an exhaust-gas purifying catalyst (12) that contains at least one kind of noble metals, such as platinum, and transition metals.

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 200° C. to 700° 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: 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 200° C. to 700° 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.