SYSTEM PROVIDED WITH CATALYST FOR CLEANING EXHAUST GAS, EXHAUST GAS CLEANING APPARATUS AND INTERNAL

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PROBLEM TO BE SOLVED : To efficiently perform exhaust gas cleaning regardless of an exhaust gas temperature when an oxygen sucking/releasing material is used in exhaust gas cleaning. SOLUTION : The catalyst for cleaning the exhaust gas is used, which is provided with an active component comprising at least one kind of metal of noble metal and transition metal; an NOx occulusion material for sucking/releasing a nitrogen oxide according to a peripheral concentration of nitrogen oxide; and a compound represented by A2O2SO4 and/or A2O2S (A is rare earth element). COPYRIGHT : (C)2006, JPO&NCIPI