Abstract: A catalyst carrier which includes a catalyst support layer containing an alkaline earth metal and/or an alkali metal disposed on an alumina substrate. The alkaline earth metal and/or the alkali metal is suppressed or prevented from diffusing into the substrate to react with alumina in the substrate. A catalyst support layer 3 that contains an alkaline earth metal and/or an alkali metal is formed on a surface of an alumina substrate 1 having a three-dimensional network structure. A zirconia layer 2 consisting of zirconia and/or stabilized zirconia is disposed between the substrate 1 and the catalyst support layer 3. The zirconia layer 2 has a thickness of 3 ?m or more in a region of at least 65% of the substrate surface. The zirconia layer suppresses or prevents the alkaline earth metal and/or the alkali metal in the catalyst support layer from diffusing into the substrate.

Abstract: A method of air decontamination for a fuel cell to remove contaminants, that reduce cell performance, in air to be supplied to a fuel cell by treating the air so that the concentration of a sulfur compound is reduced to 5 ppb or less by removing the sulfur compound in the air is provided. By reducing the concentration of the sulfur compound in the fuel cell air to 5 ppb or less, the electromotive-force reduction in the fuel cell caused by the fuel cell electromotive-force-reducing impurities in the fuel cell air can be substantially completely prevented to stably maintain the characteristics of the fuel cell for a long period of time and to extend the lifetime thereof.

Abstract: An adsorption-desorption material having a high carbon dioxide adsorption-desorption capability, a low pressure loss, a high thermal diffusion efficiency, and high resistance to repeated stresses, e.g., expansion and shrinkage, as well as an adsorption-desorption apparatus including the adsorption-desorption material, is provided. The adsorbent is composed of a three-dimensional network skeleton structure or a structure having three-dimensional network voids, the structure constructed by a compound having a carbon dioxide adsorption-desorption capability. The carbon dioxide adsorption-desorption apparatus is provided with this adsorbent.

Abstract: A fluid cleaning filter of the present invention consists of a composite matrix composed of a pleated substrate 2 configured into a pleated shape and an active carbon-containing layer 3, wherein the pleated substrate 2 is made of polyurethane foam 2a having a three-dimensional network skeletal structure, and the composite matrix is configured into a cylindrical shape. A filtering medium layer 2b made of fibers is formed on the surface of the polyurethane foam 2a facing the active carbon-containing layer 3. The fibers of the filtering medium layer maybe electrostatically charged. The fluid cleaning filter exhibits good efficiency of dust collecting and deodorization even when a fluid flows through the filter at high rate.

Abstract: A method of air decontamination for fuel cell to remove contaminants, reducing cell performance in air to be supplied to a fuel cell by treating the air so that the concentration of a sulfur compound is reduced to 5 ppb or less by removing the sulfur compound in the air. By reducing the concentration of the sulfur compound in the fuel-cell air to 5 ppb or less, the electromotive-force reduction in the fuel cell caused by the fuel-cell electromotive-force-reducing impurities in the fuel-cell air can be substantially completely prevented to stably maintain the characteristics of the fuel cell for a long period of time and to extend the lifetime thereof.

Abstract: An adsorption-desorption material having a high carbon dioxide adsorption-desorption capability, a low pressure loss, a high thermal diffusion efficiency, and high resistance to repeated stresses, e.g., expansion and shrinkage, as well as an adsorption-desorption apparatus including the adsorption-desorption material, is provided. The adsorbent is composed of a three-dimensional network skeleton structure or a structure having three-dimensional network voids, the structure constructed by a compound having a carbon dioxide adsorption-desorption capability. The carbon dioxide adsorption-desorption apparatus is provided with this adsorbent.

Abstract: A fluid cleaning filter of the present invention consists of a composite matrix composed of a pleated substrate 2 configured into a pleated shape and an active carbon-containing layer 3, wherein the pleated substrate 2 is made of polyurethane foam 2a having a three-dimensional network skeletal structure, and the composite matrix is configured into a cylindrical shape. A filtering medium layer 2b made of fibers is formed on the surface of the polyurethane foam 2a facing the active carbon-containing layer 3. The fibers of the filtering medium layer maybe electrostatically charged. The fluid cleaning filter exhibits good efficiency of dust collecting and deodorization even when a fluid flows through the filter at high rate.