01909nas a2200217   4500008004100000022001400041245009800055210006900153260011000222300001400332490000600346520103900352100002701391700002901418700002801447700002601475700001901501700002101520700002601541856012401567       2015                        eng d  a2046-206900aEfficient robust fluorite CeZrO4-delta oxide catalyst for the eco-benign synthesis of styrene0 aEfficient robust fluorite CeZrO4delta oxide catalyst for the eco  aTHOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLANDbROYAL SOC CHEMISTRYcDEC  a3619-36260 v53 a<p>In this work, we have reported CeO2, ZrO2, physically mixed (PH)-CeO2/ZrO2 and fluorite CeZrO4-delta oxides and their catalytic activities for the oxidative dehydrogenation (ODH) of ethyl benzene (EB) to styrene (ST) using molecular oxygen, air and carbon dioxide as oxidants. The catalysts were prepared by a gel-combustion method followed by calcination at 600 degrees C for 6 h and subjected to catalytic activity measurements. All the catalysts were characterized and studied by various physicochemical methods. The reaction parameters were varied systematically such as different catalysts, oxidants, temperatures, EB flow and oxidant flow. CeZrO4-delta accounted for a 47% styrene yield for 72 h without any significant deactivation under optimized reaction conditions. A thorough analysis of the spent catalysts demonstrated the robustness of the catalyst for this reaction under different oxidants and reaction conditions. Pristine CeO2 deactivated easily and the activity decreased with time on stream of the reaction.</p>1 aPeriyasamy, Kaliyappan1 aAswathy, Venugopalan, T.1 aKumar, Venugopal, Ashok1 aManikandan, Marimuthu1 aShukla, Rakesh1 aTyagi, Avesh, K.1 aRaja, Thirumalaiswamy  uhttps://library.ncl.res.in/content/efficient-robust-fluorite-cezro4-delta-oxide-catalyst-eco-benign-synthesis-styrene-0