Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10244705 | Journal of Catalysis | 2005 | 11 Pages |
Abstract
NOx adsorption over a wide temperature range (30-350â°C) on monolith supported Na-ZSM-5 films were studied with a gas flow reactor. The nature of the adsorbed species was further investigated by in situ infrared spectroscopy. Depending on the adsorption temperature, three different ranges of thermally stable species were observed on Na-ZSM-5 films. In addition to the role of cationic sites and residual hydroxyl groups in zeolite frameworks, it was found that the formation of nitric acid plays an important role in NO2 adsorption. Nitrate species were formed during adsorption by two mechanisms. The nitrates formed via nitric acid and involving NO formation had lower thermal stability than those formed through an NO2 disproportionation reaction.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Catalysis
Authors
Indra Perdana, Derek Creaser, Olov Ãhrman, Jonas Hedlund,