Catalyst, a method of using a catalyst, and an arrangement including a catalyst, for controlling NO and/or CO emissions from a combustion system without using external reagent
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United States of America Patent
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app pub date -
Sep 6, 2006
filing date -
Dec 22, 2005
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Abandoned
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Abstract
A catalyst, a method of and an arrangement for using a catalyst for controlling NO and/or CO emissions from a combustion system that combusts carbonaceous fuels, including introducing carbonaceous fuel and combustion air into a furnace of the combustion system for combusting the carbonaceous fuel in oxidizing conditions and producing flue gas that includes NO and/or CO, wherein the ratio of molar concentrations of CO and NO.sub.x is preferably at least 0.7, and leading flue gas from the furnace to contact with a catalyst in a flue gas channel, wherein the catalyst has a metal oxide loading comprising oxides of iron and one or more of a group consisting of copper, cerium and potassium, deposited on a porous support material, wherein the metal oxide loading is preferably 1-20% of the weight of the support material and ratio of the weight of oxides the group consisting of copper, cerium and potassium to the weight of iron oxides is preferably from 0.25 to 3, for converting, free from introducing an external agent for NO reduction, NO to N.sub.2, by using CO as the reductant of NO, and/or CO to CO.sub.2.
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