02091nas a2200241   4500008004100000022001400041245010400055210006900159260007300228300001200301490000800313520120800321653001201529653001801541653003001559653002201589653002401611653001801635100001901653700002401672700002101696856013201717       2016                        eng d  a1381-116900aCatalytic decarboxylation of non-edible oils over three-dimensional, mesoporous silica-supported Pd0 aCatalytic decarboxylation of nonedible oils over threedimensiona  aPO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSbELSEVIER SCIENCE BVcJUN  a126-1340 v4173 a<p>Deoxygenation of fatty acids (oleic and stearic acids) and non-edible oil (jatropha oil) over Pd(1-5 wt%) supported on two structurally different, three-dimensional, mesoporous silica (SBA-12 and SBA-16) catalysts was investigated. Pd/SBA-16 (cubic mesoporous structure with space group Im (3) over barm) showed higher catalytic activity than Pd/SBA-12 (hexagonal mesoporous structure with space group p6(3)/mmc). The influence of reaction parameters like temperature, H-2 pressure and Pd content as well as the nature of the feedstock on catalytic activity and product selectivity was studied. A temperature of above 320 degrees C, reaction time of 5 h and Pd content (on silica surface) of 3 wt% enabled complete conversion of the fatty compounds into diesel-range hydrocarbons. Deoxygenation proceeded through hydrodeoxygenation and decarboxylation mechanisms when a saturated (stearic) acid was used as a feed while it advanced mainly through decarboxylation route when an unsaturated (oleic) acid was employed. Higher surface hydrophobicity and smaller size particles of Pd are the possible causes for the superior catalytic activity of Pd/SBA-16. (C) 2016 Elsevier B.V. All rights reserved.</p>10aBiofuel10aDeoxygenation10aDiesel-range hydrocarbons10aMesoporous silica10aSupported palladium10aVegetable oil1 aRaut, Ravindra1 aBanakar, Vikram, V.1 aDarbha, Srinivas  uhttps://library.ncl.res.in/content/catalytic-decarboxylation-non-edible-oils-over-three-dimensional-mesoporous-silica-supported01772nas a2200217   4500008004100000022001400041245008700055210006900142260000800211300001400219490000600233520107900239653001301318653001801331653001601349653001701365653001701382100002201399700002101421856011201442       2017                        eng d  a2365-654900aPromotional effect of WOx in Pt-WOx/AlPO4-5 catalyzed deoxygenation of fatty acids0 aPromotional effect of WOx in PtWOxAlPO45 catalyzed deoxygenation  cFEB  a1895-19010 v23 a<p>WOx promoted Pt/AlPO4-5 catalysts with varying Pt and W contents were prepared by wet-impregnation method and characterized. Catalysts with Pt to W weight ratio of 1: 2 exhibited higher catalytic performance than the other compositions in deoxygenation of oleic acid (OA). WOx enhanced significantly the catalytic activity of Pt and enabled quantitative conversion of OA to linear alkanes (predominantly C-18/C-17) at a temperature as low as 280 degrees C. It changed the reaction pathway from decarbonylation/ decarboxylation (DCO for Pt/AlPO4-5) to hydrodeoxygenation (HDO for Pt-WOx/AlPO4-5). It affected the particle size and redox behaviour of Pt. The enhanced H-spill over (by 14.8%) and presence of strong acid sites (300 - 500 degrees C) are the cause for the high activity of Pt-WOx/AlPO4-5 catalysts even at lower temperatures. Partially reduced WOx activates OA and leads to the HDO product (C-18). In the absence of WOx, Lewis acid sites of the support activate OA through the C=O group and Pt facilitates C-C cleavage and formation of DCO product (C-17).</p>10abiofuels10aDeoxygenation10aFatty acids10aGreen Diesel10aHydrocarbons1 aJanampelli, Sagar1 aDarbha, Srinivas  uhttps://library.ncl.res.in/content/promotional-effect-wox-pt-woxalpo4-5-catalyzed-deoxygenation-fatty-acids01711nas a2200217   4500008004100000022001400041245012200055210006900177260000800246300001100254490000700265520093800272653001301210653003701223653001801260653002001278653002101298100002201319700002101341856013101362       2019                        eng d  a1571-101300aHydrodeoxygenation of vegetable oils and fatty acids over different group VIII metal catalysts for producing biofuels0 aHydrodeoxygenation of vegetable oils and fatty acids over differ  cJUN  a90-1010 v233 a<p>Energy security and environment protection are two important aspects of sustainable development. Biofuels are renewable and carbon neutral. They are suitable replacement for conventional fossil derived transport fuels. Their use leads to sustainable development. Among several technological options, catalytic hydrodeoxygenation of vegetable oils leading to diesel-range hydrocarbons is the most attractive approach for producing biofuels. The green diesel, thus produced, could be blended with petro-diesel or used as standalone fuel in the conventional diesel engines. Our research group has been active in developing efficient solid catalysts for hydroprocessing of vegetable oils. This account presents some of our efforts using supported group VIII metals and the importance of electronic contact between metal and support on the catalytic activity and hydrodeoxygenation selectivity in hydroprocessing of vegetable oils.</p>10abiofuels10aCatalysis over group VIII metals10aDeoxygenation10aHydroprocessing10aRenewable diesel1 aJanampelli, Sagar1 aDarbha, Srinivas  uhttps://library.ncl.res.in/content/hydrodeoxygenation-vegetable-oils-and-fatty-acids-over-different-group-viii-metal-catalysts