发明名称 |
HIGHLY HEAT-RESISTANTβ-ZEOLITE AND SCR CATALYST USING SAME |
摘要 |
A subject for the invention is to provide a highly heat-resistant SCR catalyst which has an NOx reduction percentage of 40% or higher at 200°C after a hydrothermal durability treatment. The invention relates to use of ²-type zeolite which has an SiO 2 /Al 2 O 3 molar ratio of 20 or higher but less than 30 and a crystallite diameter before a hydrothermal durability treatment of 20 nm or larger, shows a change in crystallite through the hydrothermal durability treatment of less than 10%, and has a fluorine content lower than 0.1 %. The ²-type zeolite can be crystallized from a liquid reaction mixture containing a secondary and/or a tertiary alkylamine having 5 or more carbon atoms. |
申请公布号 |
KR20110056490(A) |
申请公布日期 |
2011.05.30 |
申请号 |
KR20117003474 |
申请日期 |
2009.08.17 |
申请人 |
TOSOH CORPORATION |
发明人 |
TAKAMITSU YASUYUKI;ITO YUKIO |
分类号 |
C01B39/48;B01D53/94;B01J20/18;B01J29/76 |
主分类号 |
C01B39/48 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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