02092nas a2200253   4500008004100000022001400041245010500055210006900160260007300229300001200302490000700314520115000321653001601471653001701487653004701504653002501551653002001576100002701596700002401623700002001647700002501667700002001692856012601712       2010                        eng d  a1003-995300aOxidation of propane to acrylic acid and acetic acid over alkaline earth-doped Mo-V-Sb-O-x catalysts0 aOxidation of propane to acrylic acid and acetic acid over alkali  aPO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSbELSEVIER SCIENCE BVcNOV  a593-5990 v193 a<p>Alkaline earth metal (Mg, Ca, Sr and Ba)-doped Mo-V-Sb-O-x catalysts, prepared by a dry-up method, have been investigated for their catalytic performance in the oxidation of propane under different reaction conditions. The catalysts have been characterized by N-2 adsorption-desorption, temperature-programmed desorption (TPD) of NH3, SEM and XRD. Influence of water vapor on the catalytic performance, particularly on the selectivities to acetic acid and acrylic acid, has also been studied. The selectivity to acrylic acid was improved significantly by the doping of alkaline earth metals to Mo-V-Sb-O-x catalysts. The surface acidic sites of the catalyst decreased with the doping of the catalyst with alkaline earth metals, which ultimately was found to be beneficial for obtaining high selectivity to acrylic acid. The catalytic activity and product selectivities were found to be influenced by the reaction temperature, C3H8/O-2 ratio and space velocity. A significant improvement in the selectivity to acrylic acid has also been observed by the addition of water vapor in the feed of propane and oxygen in the oxidation of propane.</p>10aAcetic acid10aacrylic acid10aalkaline earth doped Mo-V-Sb-O-x catalysts10aoxidation of propane10aSurface acidity1 aChaudhari, Chandan, S.1 aSable, Shailesh, S.1 aGurav, Hanumant1 aKelkar, Ashutosh, A.1 aRane, Vilas, H.  uhttps://library.ncl.res.in/content/oxidation-propane-acrylic-acid-and-acetic-acid-over-alkaline-earth-doped-mo-v-sb-o-x-001769nas a2200265   4500008004100000022001400041245008200055210006900137260007300206300001200279490000800291520089000299653000601189653002301195653001101218653001601229653002801245653002001273100001701293700002501310700002101335700002401356700001701380856010601397       2011                        eng d  a0920-586100aRole of promoters in copper chromite catalysts for hydrogenolysis of glycerol0 aRole of promoters in copper chromite catalysts for hydrogenolysi  aPO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSbELSEVIER SCIENCE BVcAPR  a447-4500 v1643 a<p>Various copper chromite catalysts with and without promoters were prepared by simultaneous co-precipitation and digestion technique and the role of promoters (Al, Ba and Zn) was investigated for hydrogenolysis of glycerol to 1,2-propylene glycol (1,2-PG) in both batch and continuous operations. Among various promoters studied, copper chromite catalyst with Ba as a promoter showed the highest activity and selectivity of 85% to 1,2-PG. This catalyst was found to be active for more than 800 h in a continuous operation also. Ammonia TPD results showed that barium promoted copper chromite catalyst had the highest acidity which facilitates the dehydration of glycerol to acetol which is the first step in hydrogenolysis of glycerol to 1,2-PG. The effect of barium content and variation in the promoters combination was also studied. (C) 2010 Elsevier B.V. All rights reserved.</p>10a110a2-Propylene glycol10aAcetol10aAmmonia TPD10aGlycerol hydrogenolysis10aSurface acidity1 aMane, R., B.1 aGhalwadkar, Ajay, A.1 aHengne, Amol, M.1 aSuryawanshi, Y., R.1 aRode, C., V.  uhttps://library.ncl.res.in/content/role-promoters-copper-chromite-catalysts-hydrogenolysis-glycerol-0