Copper CHA zeolite catalysts
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United States of America Patent
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Dec 20, 2022
Grant Date -
Aug 20, 2020
app pub date -
Apr 22, 2020
filing date -
Feb 27, 2007
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Abstract
Zeolite catalysts and systems and methods for preparing and using zeolite catalysts having the CHA crystal structure are disclosed. The catalysts can be used to remove nitrogen oxides from a gaseous medium across a broad temperature range and exhibit hydrothermal stable at high reaction temperatures. The zeolite catalysts include a zeolite carrier having a silica to alumina ratio from about 15:1 to about 256:1 and a copper to alumina ratio from about 0.25:1 to about 1:1.
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