Dr. Valdes-Morales, Hector

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Dr. Valdes-Morales, Hector
Nombre completo
Valdes Morales, Hector
Facultad
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hvaldes@ucsc.cl
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Has files: false Ă— Subject: Zeolite Ă—

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    Publication
    Application of high silica zeolite ZSM-5 in a hybrid treatment process based on sequential adsorption and ozonation for VOCs elimination
    (Journal of Environmental Sciences, 2016)
    Dr. Valdes-Morales, Hector 
    ;
    Zaitan, Hicham
    ;
    Manero, Marie
    In this study, a hydrophobic synthetic zeolite, namely ZSM-5 is chosen as an adsorbent/ catalyst for toluene removal. Experimental results showed that toluene adsorption onto ZSM-5 was favourable, following a Langmuir adsorption isotherm model. ZSM-5 zeolite was regenerated using gaseous ozone at low temperature. Adsorbed toluene was oxidised, releasing mainly CO2 and H2O. Traces of oxidation by-products such as acetic acid and acetaldehyde were formed and remained adsorbed after the oxidativate regeneration with ozone. After four successive cycles of adsorption/ozonation, the adsorption efficiency was not affected (92%–99%). These results showed that volatile organic compound (VOC) removal by adsorption onto ZSM-5 zeolite followed by ozone regeneration could be used as a promising hybrid process for the control of VOC emissions in terms of efficiency.