CATALYST FOR REMOVING NITROGEN OXIDE CONTAINED IN COMBUSTION EXHAUST GAS, AND METHOD FOR REMOVING NITROGEN OXIDE USING SAID CATALYST

摘要

The present invention provides a method by which a nitrogen oxide contained in an exhaust gas can be removed with high efficiency at a temperature around an ammonium sulfate precipitation temperature. A method for removing a nitrogen oxide contained in an exhaust gas, characterized by comprising bringing the exhaust gas into contact with a catalyst at a temperature ranging from 200 to 350˚C, wherein the catalyst is produced by the ion exchange of an MFI-type zeolite with at least one element selected from Fe, Co and Mn.