A new kinetic models analysis for CO adsorption on palladium zeolite nanostructure by roll-coating technique

The aim of this article was the fabrication of zeolite@Pd/Al۲O۳ nanostructure through roll-coating technique for CO gas adsorption from air. Transmission electron microscopy (TEM), field-emission scanning electron microscopy (FESEM), X-ray diffraction (XRD), and energy-dispersive x-ray spectroscopy (EDX) were performed to investigate the morphological, structural, and elemental properties of zeolite@Pd/Al۲O۳ adsorbent. A continues carbon monoxide gas analyzer KIGAZ ۲۱۰ was applied for analyzing of CO gas adsorption on as-present adsorbent in an experimental set-up. The adsorption capacity at equilibrium time for CO molecules was studied by zeolite@Pd/Al۲O۳ adsorbent. The Elovich, Avrami, and Fractional power kinetic models were used for this study. The equal value of experimental and theoretical adsorption capacity at equilibrium time as well as the unit value of regression coefficient was indicated that the Avrami kinetic model was the suitable model to describe CO removal from air through zeolite@Pd/Al۲O۳ nanostructure. The results showed us, the CO molecules were efficiently removed by catalytic zeolite adsorbent more than ۹۵% from air at optimized conditions.

Keywords:

Carbon monoxide (CO) , Toxic gas analysis , Adsorption , Alumina palladium zeolite composite films , Kinetic models