Abstract: A catalyst for purification of exhaust gas containing a phosphorus compound includes: a lower catalyst layer containing at least one of noble metal provided on a refractory three-dimensional structure; and an upper catalyst layer at an inflow side of exhaust gas and an upper catalyst layer at an outflow side of exhaust gas provided on a surface of the lower catalyst layer. The upper catalyst layer at the inflow side and the upper catalyst layer at the outflow side have different concentrations of noble metal. The catalyst has an intermediate zone with a length of 3 to 23% of the overall length of the refractory three-dimensional structure provided between the upper catalyst layer at the inflow side and the upper catalyst layer at the outflow side. The intermediate zone starts from a position 10 to 38% from an end face of the catalyst at the inflow side of exhaust gas.

Abstract: The present invention provides a self-emulsification type emulsion exhibiting excellent adhesion to olefin-based base materials such as polyethylene and polypropylene without using an emulsifier. The self-emulsification type emulsion of the present invention comprises a tackifier and a modified polypropylene resin having an anionic functional group, and satisfies (1) and (2) given below: (1) the modified polypropylene resin having an anionic functional group is dispersed in water in the absence of an emulsifier, and (2) a dispersion particle comprising the modified polypropylene resin having an anionic functional group surrounds the tackifier.

Abstract: Prvided is a catalyst degradation preventing apparatus of a catalyst device containing a catalyst component that comes into contact with gas to chemically change the gas, including a burner for burning a fuel by combustible air to generate a gas containing nitrogen oxides by combustion, an endothermic device for absorbing heat from gas, a catalyst device having a catalyst component for decreasing nitrogen oxides contained in the gas after passing through the endothermic device, and a first poisoning substance removing device for removing a poisoning substance containing at least sulfur, which is contained in the fuel and adsorbs to a catalyst component or reacts with the catalyst component to form a compound. According to the apparatus, the decrease in performance of the catalyst device is prevented, and the effect of decreasing pollution can be retained over a long period of time.

Abstract: Provided is a catalyst degradation preventing apparatus, which is for a catalyst device containing a catalyst component that comes into contact with gas to chemically change the gas, in which the catalyst device is provided with a poisoning substance removing device on a primary side thereof, for removing a poisoning substance which is contained in the gas and adsorbs to the catalyst component or forms a compound with the catalyst component. Further, the poisoning substance removing device and the catalyst device are provided with an interval placed therebetween and to be exchangeable with each other, or a carrier of a component that adsorbs to the poisoning substance of the poisoning substance removing device or forms a compound with the poisoning substance and a carrier of a catalyst component of the catalyst device are integrally formed so as to be exchangeable.

Abstract: [Object] To provide a combustion device capable of suppressing poisoning and deterioration of a CO oxidation catalyst due to adhesion of S (sulfur) to the CO oxidation catalyst, which is provided in the combustion device such as a boiler for the purpose of reducing and removing the CO in the combustion gas. [Solving Means] Provided is a combustion device including at least one can body which has a gas flow passage R allowing passage of a combustion gas G1 generated at a burner 16 and which heats a heat medium through heat exchange with the combustion gas G1 passing through the gas flow passage R, in which, in the gas flow passage R, a CO oxidation catalyst C1 is arranged in a region corresponding to a temperature range at the time of passing of the combustion gas G1 where adhesion of S (sulfur) contained in the combustion gas G1 to the CO oxidation catalyst C1 is suppressed.