TY - JOUR T1 - Liquid phase oxidation of p-vanillyl alcohol over synthetic Co-saponite catalyst JF - Applied Clay Science Y1 - 2011 A1 - Garade, Ajit C. A1 - Biradar, Narayan S. A1 - Joshi, S. M. A1 - Kshirsagar, V. S. A1 - Jha, Ratnesh Kumar A1 - Rode, Chandrashekhar V. KW - Co-saponite KW - Cobalt oxide phase ratio KW - p-Vanillin KW - p-Vanillyl alcohol oxidation KW - Porosity transition KW - Temperature programmed reduction AB -

Effect of cobalt loading on porosity of synthetic Co-saponite catalysts and on the air oxidation of p-vanillyl alcohol was studied by varying Co content in the range of 5% to 30% using in situ precipitation method. The pore size increased from 1.29 to 3.69 nm indicating a transition from micro to meso porosity, with increase in Co loading from 5% to 30%. The distribution ratio of Co(3)O(4)/CoO phases as estimated from TPR studies, also increased from 0.84 to 1.67 with increase in Co loading from 5% to 13% and remained almost constant (1.7) with further increase in Co loading up to 30%. The highest activity (conversion 55%) and selectivity of 99% to p-vanillin obtained for 13% Co-saponite in p-vanillyl alcohol oxidation was due to the highest distribution ratios of Co(3)O(4)/CoO phases. (C) 2010 Elsevier B.V. All rights reserved.

PB - ELSEVIER SCIENCE BV CY - PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS VL - 53 IS - 2 U3 - Foreign U4 - 3.31 ER -