01473nas a2200229 4500008004100000022001400041245007100055210006900126260000800195300001000203490000800213520074300221653002400964653001200988653003301000653001701033653001701050653003201067100002201099700002101121856010101142 2019 eng d a1566-736700aHighly efficient Pt-MoOx/ZrO2 catalyst for green diesel production0 aHighly efficient PtMoOxZrO2 catalyst for green diesel production cMAY a70-760 v1253 a

Bimetallic Pt-MoOx supported on ZrO2 exhibits higher catalytic activity than known catalysts for converting fatty acids into green diesel at as low as 200 degrees C. A change in selectivity from decarboxylation/decarbonylation to hydrodeoxygenation and enhancement in the deoxygenation activity of Pt were observed when MoOx was also present in the catalyst composition. In X-ray photoelectron spectra, Pt 4f lines of 4Pt-8MoO(x)/ZrO2 occurred at lower binding energies than those for 4Pt/ZrO2. Part of Mo was reduced from +6 to +5 oxidation state in the presence of Pt. There seems to exist some electronic interaction between the support and metal, making 4Pt-8MoO(x)/ZrO2 a highly efficient and selective deoxygenation catalyst.

10aBimetallic catalyst10aBiofuel10aDeoxygenation of fatty acids10aGreen Diesel10aHydrocarbons10aSupported platinum catalyst1 aJanampelli, Sagar1 aDarbha, Srinivas uhttps://library.ncl.res.in/content/highly-efficient-pt-mooxzro2-catalyst-green-diesel-production01711nas 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

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.

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-catalysts01642nas a2200169 4500008004100000022001400041245012600055210006900181260000800250300001400258490000700272520099600279100002101275700002501296700002101321856013001342 2021 eng d a1144-054600aHydrogenolysis of glycerol in an aqueous medium over Pt/WO3/zirconium phosphate catalysts studied by H-1 NMR spectroscopy0 aHydrogenolysis of glycerol in an aqueous medium over PtWO3zircon cMAR a5013-50220 v453 a

Bifunctional Pt/WO3/zirconium phosphate catalyzes the liquid-phase hydrogenolysis of glycerol in an aqueous medium. H-1 NMR spectroscopy (solvent suppression pulse program) is employed to monitor this reaction. Propanediols (1,3 + 1,2-PDO) formed as the major product along with propanols (1- and 2-POs) as the minor product. A synergistic enhancement in glycerol conversion and selectivity to 1,3-PDO was observed when both Pt and WO3 were present in the catalyst. A volcano-shape variation of catalytic activity with W content was observed. A catalyst with 8 wt% W and 1 wt% Pt exhibited the highest selective hydrogenolysis performance (glycerol conversion = 92.3% and total PDOs selectivity = 45.9% and 1,3-PDO selectivity = 20.8% at 200 degrees C). Dispersed Pt in contact with polytungstate-type WO3 species was found to be the active catalytic site. H-1 NMR spectroscopy is demonstrated as an attractive technique to quantify the products of a glycerol hydrogenolysis reaction.

1 aBhowmik, Susmita1 aEnjamuri, Nagasuresh1 aDarbha, Srinivas uhttps://library.ncl.res.in/content/hydrogenolysis-glycerol-aqueous-medium-over-ptwo3zirconium-phosphate-catalysts-studied-h-1