CATALYST FOR REMOVAL OF NITROGEN OXIDE AND METHOD FOR REMOVAL OF NITROGEN OXIDE
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United States of America Patent
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N/A
Issued Date -
Oct 22, 2009
app pub date -
Feb 12, 2008
filing date -
Feb 13, 2007
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A porous material having fine holes with controlled diameters and a catalyst having an active ingredient supported in the fine holes in the porous material are used. According to a first embodiment of the invention, the diameter of the plurality of fine holes is within a range of 8 to 9 Å. The fine hole diameter is preferably from 8 to 9 Å when the diameter is measured in a gas adsorption method in which fine holes with diameters of 3.4 to 14 Å can be measured. The fine hole diameter is also preferably from 8 to 9 Å when the fine hole diameter is calculated from a crystal structure. According to a second embodiment of the invention, the porous material is mesoporous silica. The primary particle diameter of the mesoporous silica is preferably within a range of 150 to 300 nm.
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