EXHAUST GAS CLARIFICATION CATALYST AND EXHAUST GAS CLARIFICATION METHOD,申请号JP20030390088-传众专利搜索

EXHAUST GAS CLARIFICATION CATALYST AND EXHAUST GAS CLARIFICATION METHOD

申请公布号：JP2004322077(A)

申请号：JP20030390088

申请日期：2003.11.20

申请公布日期：2004.11.18

申请人：

SUMITOMO METAL MINING CO LTD

发明人：SUGIYAMA MASASHI;SODA KENGO

分类号：F01N3/08;B01D53/94;B01J29/76;B01J29/78;F01N3/10

主分类号：F01N3/08

摘要：<P>PROBLEM TO BE SOLVED: To provide an exhaust gas clarification catalyst which has excellent durability, excellent practicality and excellent denitrification performance in that nitrogen oxides (NOx) can be removed even if exhaust gas contains sulfur oxides and that is not deteriorated even when the exhaust gas has comparatively low temperature of 300-400°C, and to provide an exhaust gas clarification method using the catalyst. <P>SOLUTION: This catalyst is β-zeolite on which at least one metal selected from iron, cobalt, silver, molybdenum and tungsten is deposited. The molar ratio of SiO<SB>2</SB>/Al<SB>2</SB>O<SB>3</SB>in the β-zeolite is preferably made to be 20-70. NOx in the exhaust gas is reduced/removed by bringing the oxygen-excessive exhaust gas into contact with this catalyst in the presence of methanol and/or dimethyl ether being reducing agents. <P>COPYRIGHT: (C)2005,JPO&NCIPI