Process for the removal of nitrogen oxides from off-gases
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United States of America Patent
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-
Mar 28, 1995
Grant Date -
N/A
app pub date -
Aug 21, 1992
filing date -
Aug 31, 1990
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The present invention relates to a process for the purification of off-gases containing nitrogen oxides. An off-gas is passed through a reactor in admixture with ammonia or an ammonia precursor over a plurality of spaced catalyst beds under conditions to reduce the nitrogen oxides to nitrogen gas while heat is liberated. After the gas stream has obtained a desired temperature, the gas flow is reversed.
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