Adsorption Prperties of Nitrogen Monooxide on Metal Ion-exchanged Zeolites

Abstract

Abstract: The adsorption properties of nitrogen monooxide (NO) on various metal ion-exchanged zeolites were examined by adsorption-desorption measurement in a fixed bed flowapparatus.The amounts of reversible (q_rev) and irreversible (q_irr) adsorption of NOwerechanged with the types of metal ion and zeolite structure.Among the samples tested, thecopper ion-exchanged ZSM-5 and silver ion-exchanged mordenite showed the greatest abilityfor reversible ads0rption of NO.The amounts of reversible and irreversible ads 0rption of NOper metal ion exchanged increased with decreasing aluminum content of zeolites, and wereconstant, independent of the ion exchange level for ZSM-5 ze0lites, but changed with the ionexchange level for mordenite zeolites- It has also been found that the adsorption propertiesare dependent on adsorption temperature: q_irr, increased with decreasing adsorption tempera-ture for both c0pper and silver ion exchanged ze0lites, however, q_rev of Cu-ZSM-5 showed amaximum at 243 K, and q_rev of Ag-MORincreased with decreasing adsorption temperature.

Key words: Metalion-exchanged zeolites, Nitrogen monooxide, Adsorption

CLC Number:

O643.1

TrendMD:

ZHANG Wen-Xiang, JIA Ming-Jun, WU Tong-Hao, SUN Tie, YAHIRO Hidenori, IWAMOTO Masakazu, JUN Izumi. Adsorption Prperties of Nitrogen Monooxide on Metal Ion-exchanged Zeolites[J]. Chem. J. Chinese Universities, 1997, 18(12): 1999.

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Adsorption Prperties of Nitrogen Monooxide on Metal Ion-exchanged Zeolites

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