Patent application number | Description | Published |
20090053121 | CATALYST FOR OXIDIZING MERCURY METAL, EXHAUST GAS PURIFYING CATALYST COMPRISING CATALYST FOR OXIDIZING MERCURY METAL, AND METHOD FOR PRODUCING SAME - A catalyst mainly containing silicon oxide and vanadium oxide and having an Si/V atomic ratio within the range from 99.5/0.5 to 85/15 is obtained by gelatinizing a liquid mixture of a colloidal silica and a vanadium compound in advance, then mixing the thus-obtained slurry by heating, and finally drying and/or firing the resulting mixture. As a catalyst for oxidizing mercury metal, this catalyst is brought into contact with an exhaust gas containing mercury metal, thereby oxidizing mercury metal. | 02-26-2009 |
20090246111 | EXHAUST GAS PURIFICATION CATALYST AND METHOD FOR PRODUCTION THEREOF - The invention realizes a catalyst which is hardly deteriorated even when volatile catalyst-poisoning compounds such as P and As are accumulated and which can reduce the rate of oxidation of SO | 10-01-2009 |
20090311155 | CATALYST FOR OXIDATION OF METAL MERCURY - A catalyst is provided having higher mercury oxidation performance than a conventional catalyst without increasing catalyst quantity or enhancing SO | 12-17-2009 |
20100183492 | EXHAUST GAS PURIFYING CATALYST - To overcome the problem of a conventional catalyst and to provide an exhaust gas purifying catalyst that meets the requirement concerning Hg oxidation activity and SO | 07-22-2010 |
20110116999 | EXHAUST GAS PURIFICATION CATALYST ON WHICH INFLUENCE OF IRON COMPOUND HAS BEEN SUPPRESSED - An exhaust gas purification catalyst is provided which contains titanium oxide as a main component and an oxide of one element or two or more elements selected from the group consisting of tungsten (W), molybdenum (Mo), and vanadium (V) as an active component, wherein the exhaust gas purification catalyst contains phosphoric acid or a water soluble phosphoric acid compound so that the atomic ratio of phosphorus (P) to a catalytically active component represented by the following formula is more than 0 and 1.0 or less; | 05-19-2011 |
20110189069 | EXHAUST GAS PURIFICATION CATALYST AND METHOD FOR PRODUCTION THEREOF - The invention realizes a catalyst which is hardly deteriorated even when volatile catalyst-poisoning compounds such as P and As are accumulated and which can reduce the rate of oxidation of SO | 08-04-2011 |
20110268638 | METHOD OF MERCURY REMOVAL FROM COMBUSTION EXHAUST GAS AND COMBUSTION EXHAUST GAS PURIFICATION APPARATUS - A method for removing mercury in a combustion exhaust gas includes injecting ammonia or urea as a reducing agent into a combustion exhaust gas containing nitrogen oxides, sulfur dioxide, metallic mercury, and hydrogen halides, and then introducing the combustion exhaust gas to a denitration apparatus filled with a denitration catalyst to cause a denitration reaction and oxidize the metallic mercury to produce mercury halide; and introducing the combustion exhaust gas through an air preheater and an electric dust collector to a wet desulfurization apparatus, thereby removing sulfur dioxides and the mercury halide, wherein the ammonia concentration of the combustion exhaust gas at an exit of the denitration apparatus is maintained at 5 ppm or higher, and the mercury halide is adsorbed or precipitated onto combustion ash and collected by the electric dust collector to discharge the mercury halide out of a system. | 11-03-2011 |
20130129590 | EXHAUST GAS PURIFYING CATALYST - To overcome the problem of a conventional catalyst and to provide an exhaust gas purifying catalyst that meets the requirement concerning Hg oxidation activity and SO | 05-23-2013 |
20130142719 | EXHAUST GAS PURIFICATION CATALYST AND PRODUCTION METHOD THEREFOR, AND METHOD FOR PURIFYING NITROGEN OXIDE IN EXHAUST GAS - An exhaust gas purification catalyst is made as a composition comprising titanium oxide (TiO | 06-06-2013 |
20130251612 | EXHAUST GAS PURIFICATION CATALYST SUPPRESSING INFLUENCE OF IRON COMPOUND - An exhaust gas purification catalyst contains titanium oxide as a main component and an oxide of one element or two or more elements selected from the group consisting of tungsten (W), molybdenum (Mo), and vanadium (V) as an active component, wherein the exhaust gas purification catalyst contains phosphoric acid or a water soluble phosphoric acid compound so that the atomic ratio of phosphorus (P) to a catalytically active component represented by the following formula is more than 0 and 1.0 or less; P/catalytically active component (atomic ratio)=number of moles of P/(number of moles of W+number of moles of Mo+number of moles of V). | 09-26-2013 |