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Artit Ausavasukhi,Nattanitcha Krukrathok,Pancheewa Singthaisong 한국공업화학회 2023 Journal of Industrial and Engineering Chemistry Vol.117 No.-
Thermal transformation of copper incorporated hydrotalcite-derived oxides is investigated in ethanoldehydrogenation. Among the copper supported catalyst c-10Cu/HT600 prepared by impregnation of thermallytreated hydrotalcite at 600 C with Cu(NO3)2 solution followed by a calcination provides a high catalyticactivity, selectivity and stability. XRD, DR-UV, TGA, H2-TPR, CO2-TPD, TEM and XPS techniquesreveal that the nature of the copper species depended on the thermal treatment process and support. Such treatment at high temperatures yields a homogeneous dispersion mixed metal oxide. After copperincorporation generated CuAl2O4 spinel structure linked to the copper oxide species can suppress copperagglomeration leading to the catalytic stability. Moreover, the c-10Cu/HT600 catalyst can provide a highactivity and high selectivity to acetaldehyde even at low reaction temperatures (200 C). However, thecopper species may agglomerate to form relatively larger clusters upon increasing metal loading leadingto the deactivation.