Pretreatment layer for CO-VSA
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United States of America Patent
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Jul 2, 1996
Grant Date -
N/A
app pub date -
Sep 14, 1994
filing date -
Sep 14, 1994
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The present invention is an apparatus and method for preferentially adsorbing carbon monoxide from a gas stream containing carbon monoxide in the presence of water and potentially ammonia while not adsorbing methane, hydrogen or carbon dioxide which may be present in the gas stream using an adsorbent of a supported cuprous compound situated downstream serially from a pretreatment adsorbent of 3A zeolite which protects the cuprous compound from water. An additional pretreatment layer of a basic metal compound to protect the acid-unstable 3A zeolite layer is also contemplated.
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