<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Shubhangi B. Umbarkar</style></author><author><style face="normal" font="default" size="100%">Kotbagi, Trupti V.</style></author><author><style face="normal" font="default" size="100%">Biradar, Ankush V.</style></author><author><style face="normal" font="default" size="100%">Pasricha, Renu</style></author><author><style face="normal" font="default" size="100%">Chanale, Jyoti</style></author><author><style face="normal" font="default" size="100%">Dongare, Mohan K.</style></author><author><style face="normal" font="default" size="100%">Mamede, Anne-Sophie</style></author><author><style face="normal" font="default" size="100%">Lancelot, Christine</style></author><author><style face="normal" font="default" size="100%">Payen, Edmond</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Acetalization of glycerol using mesoporous MoO3/SiO2 solid acid catalyst</style></title><secondary-title><style face="normal" font="default" size="100%">Journal of Molecular Catalysis A-Chemical</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">Acetalization</style></keyword><keyword><style  face="normal" font="default" size="100%">Aldehyde</style></keyword><keyword><style  face="normal" font="default" size="100%">Glycerol</style></keyword><keyword><style  face="normal" font="default" size="100%">Silicomolybdic acid</style></keyword><keyword><style  face="normal" font="default" size="100%">solid acid</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2009</style></year><pub-dates><date><style  face="normal" font="default" size="100%">SEP</style></date></pub-dates></dates><number><style face="normal" font="default" size="100%">1-2</style></number><publisher><style face="normal" font="default" size="100%">ELSEVIER SCIENCE BV</style></publisher><pub-location><style face="normal" font="default" size="100%">PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS</style></pub-location><volume><style face="normal" font="default" size="100%">310</style></volume><pages><style face="normal" font="default" size="100%">150-158</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;Acetalization of glycerol with various aldehydes has been carried out using mesoporous MoO3/SiO2 as a solid acid catalyst. A series of MoO3/SiO2 catalysts with varying MoO3 loadings(1-20 mol%) were prepared by sol-gel technique using ethyl silicate-40 and ammonium heptamolybdate as silica and molybdenum source respectively. The sol-gel derived samples were calcined at 500 degrees C and characterized using various physicochemical characterization techniques. The XRD of the calcined samples showed the formation of amorphous phase up to 10 mol% MoO3 loading and at higher loading of crystalline alpha-MoO3 on amorphous silica support. TEM analyses of the materials showed the uniform distribution of MoO3 nanoparticles on amorphous silica support. Raman spectroscopy showed the formation of silicomolybdic acid at low Mo loading and a mixture of alpha-MoO3 and polymolybdate species at high Mo loadings. Moreover the Raman spectra of intermediate loading samples also suggest the presence of beta-MoO3. Acetalization of glycerol with benzaldehyde was carried out using series of MoO3/SiO2 catalysts with varying MoO3 loadings (1-20 mol%). Among the series, MoO3/SiO2 With 20 mol% MoO3 loadings was found to be the most active catalyst in acetalization under mild conditions. Maximum conversion of benzaldehyde (72%) was obtained in 8 h at 100 degrees C with 60% selectivity for the six-membered acetal using 20% MoO3/SiO2. Interestingly with substituted benzaldehydes under same reaction conditions the conversion of aldehydes decreased with increase in selectivity for six-membered acetals. These results indicate the potential of this catalyst for the acetalization of glycerol for an environmentally benign process. (C) 2009 Elsevier B.V. All rights reserved.&lt;/p&gt;</style></abstract><issue><style face="normal" font="default" size="100%">1-2</style></issue><custom1><style face="normal" font="default" size="100%">&lt;p&gt;Shubhangi B. Umbarkar&lt;/p&gt;</style></custom1><custom2><style face="normal" font="default" size="100%">&lt;p&gt;NCL&lt;/p&gt;</style></custom2><custom3><style face="normal" font="default" size="100%">Foreign</style></custom3><custom4><style face="normal" font="default" size="100%">2.872</style></custom4></record><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">More, Pavan M.</style></author><author><style face="normal" font="default" size="100%">Nguyen, D. L.</style></author><author><style face="normal" font="default" size="100%">Dongare, Mohan K.</style></author><author><style face="normal" font="default" size="100%">Shubhangi B. Umbarkar</style></author><author><style face="normal" font="default" size="100%">Nuns, N.</style></author><author><style face="normal" font="default" size="100%">Girardon, J. S.</style></author><author><style face="normal" font="default" size="100%">Dujardin, Christophe</style></author><author><style face="normal" font="default" size="100%">Lancelot, Christine</style></author><author><style face="normal" font="default" size="100%">Mamede, Anne-Sophie</style></author><author><style face="normal" font="default" size="100%">Granger, P.</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Rational preparation of Ag and Au bimetallic catalysts for the hydrocarbon-SCR of NOx: sequential deposition vs. coprecipitation method</style></title><secondary-title><style face="normal" font="default" size="100%">Applied Catalysis B-Environmental</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">Au-Ag particles</style></keyword><keyword><style  face="normal" font="default" size="100%">Co-precipitation</style></keyword><keyword><style  face="normal" font="default" size="100%">DeNO(x) reaction</style></keyword><keyword><style  face="normal" font="default" size="100%">HC-SCR</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2015</style></year><pub-dates><date><style  face="normal" font="default" size="100%">JAN</style></date></pub-dates></dates><publisher><style face="normal" font="default" size="100%">ELSEVIER SCIENCE BV</style></publisher><pub-location><style face="normal" font="default" size="100%">PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS</style></pub-location><volume><style face="normal" font="default" size="100%">162</style></volume><pages><style face="normal" font="default" size="100%">11-20</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;This study emphasizes the importance of the preparation method for bimetallic Au-Ag catalysts supported on alumina in the selective reduction of NOx by hydrocarbons with gas feed compositions representative of diesel fuelled engine exhaust gas. An optimal balance between oxidative and reductive surface properties is obtained when Au and Ag are successively introduced. Significant re-dispersion processes take place when the catalyst runs at 500 degrees C leading to a gain in activity at low temperature and ascribed to a better interaction between Au and Ag species. Co-precipitation leads to a preferential formation of intermetallic Au-Ag particles which is detrimental to the catalytic performances. Aging at 500 degrees C leads to a significant particle sintering and a strengthening of the metallic character. (C) 2014 Elsevier B.V. All rights reserved.&lt;/p&gt;</style></abstract><custom3><style face="normal" font="default" size="100%">&lt;p&gt;Foreign&lt;/p&gt;</style></custom3><custom4><style face="normal" font="default" size="100%">8.328</style></custom4></record></records></xml>