Infrared studies on nitrogen oxides adsorbed on alkali metal ion-exchanged ZSM-5 zeolites

Adsorption of NO in Li-exchanged zeolite A. A density functional theory study

“…By analogy, the results obtained so far may therefore suggest that the [Li-NO] + complex in zeolite A is located in an a-cage at the S I position in the hexagonal window. This differs from the interpretation by Kotoh et al claiming that the NO monomer is linearly adsorbed on alkali metal cations through an oxygen atom in the zeolite [32].…”

IR Spectroscopic Study of Adsorption of Binary Gases over Ion-Exchanged ZSM-5 Zeolites

“…Peak positions of ad-ponent adsorption system, NO molecules adsorbed in the sorbed CO were not altered by the addition of CH 4 , showing micropore of ZSM-5 slowly disproportionated into N 2 O and that the perturbation given by CH 4 to adsorbed CO molecule NO 2 or N 2 O 3 when the amount of adsorption was increased was small. On the other hand, the position of the n 1 peak (10). To avoid such a reaction during the IR measurement, of adsorbed methane shifted very slightly by the addition of a small amount of NO (0-18 kPa equilibrium pressure) was CO.…”

Adsorption Characteristics of Ion-Exchanged ZSM-5 Zeolites for CO2/N2 Mixtures

“…One of the authors has been studying the adsorption of several pure gases on ZSM-5 zeolites (13)(14)(15). In these studies the degree of CO 2 adsorbed irreversibly on several alkali metal ion-exchanged ZSM-5 was shown to be less than 10% of the total amount of adsorption under a CO 2 pressure below 6.7 × 10 −2 MPa (13).…”