• OUARDA BENLOUNES

      Articles written in Journal of Chemical Sciences

    • Oxidative Dehydrogenation (ODH) of Ethylbenzene with CO2 and N2O over Heteropolycompounds

      SALEM CHEKNOUN SADIA MANSOURI OUARDA BENLOUNES SMAIN HOCINE

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      Heteropolyacids of Keggin structure, H3PMo12O40, H3PMo11WO40 and the salts K3PMo11WO4040 and K2.5Fe0.08H0.26PMo11WO40 were characterized by X-ray diffraction (XRD), UV-Vis spectroscopy, Fourier transform infrared (FTIR), low-temperature nitrogen adsorption and 31PMAS NMR spectroscopy. The acid-base properties were evaluated using the isopropanol decomposition. They were tested in oxidative dehydrogenation (ODH) of ethylbenzene in the temperature range 300–400 °C at atmospheric pressure with the mild oxidants carbon dioxide and nitrous oxide, the major actors in the greenhouse effect. The results show that the best compromise between conversion and selectivity is obtained for the mixedK/Fe salt of PMo11WO40 at a relatively low temperature, namely 350°C.

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