Process for the selective catalytic reduction of the nitrogen oxides contained in a lean exhaust gas
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United States of America Patent
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Jan 1, 2002
Issued Date -
N/A
app pub date -
Jan 11, 2001
filing date -
Jan 29, 1999
priority date (Note) -
Expired
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Abstract
The invention relates to a process for the selective catalytic reduction of the nitrogen oxides contained in a lean exhaust gas from internal combustion engines by reducing the nitrogen oxides by means of ammonia on a catalyst. The process is characterized in that, in addition to the lean exhaust gas, a rich gas stream is produced that is treated in an electrical gas discharge plasma in order to form the ammonia required for the reduction.
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