The catalytic activity of Cu-ZSM-5 and Cu-Y zeolites in NO decomposition: dependence on copper concentration |
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Authors: | M. C. Campa V. Indovina G. Minelli G. Moretti I. Pettiti P. Porta A. Riccio |
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Affiliation: | (1) Centro di Studio su Struttura ed Attività Catalitica de Sistemi di Ossidi (CNR), c/o Dipartimento di Chimica, Università La Sapienza, p.le A. Moro 5, 00185 Rome, Italy |
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Abstract: | NO decomposition was studied on Cu-ZSM-5 (Cu exchange extent from 23 to 210%) and Cu-Y (Cu exchange extent from 5 to 105%) catalysts at 773 K. The results show that the activity (NO molecules decomposed per gram of catalyst per second) increases by roughly 100-fold when the extent of exchange with copper in the ZSM-5 framework increases from 80 to 100%. This behaviour shows that not all Cu sites are equivalent in their decomposition activity. Cu-ZSM-5 samples prepared with either H-ZSM-5 or Na-ZSM-5 show the same activity pattern. |
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Keywords: | NOx abatement Cu-ZSM-5 Cu-Y zeolite |
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