01723nas a2200205   4500008004100000022001400041245011500055210006900170260007100239300001400310490000700324520091700331100002801248700002501276700001701301700002101318700002301339700002501362856013001387       2010                        eng d  a1083-616000aSelective hydrogenolysis of glycerol to 1,2-propanediol: comparison of batch and continuous process operations0 aSelective hydrogenolysis of glycerol to 12propanediol comparison  a1155 16TH ST, NW, WASHINGTON, DC 20036 USAbAMER CHEMICAL SOCcNOV  a1393-14000 v143 a<p>The screening of copper chromite catalysts with various promoters such as Al, Zn, and Ba for glycerol hydrogenolysis to 1,2-propanediol (1,2-PDO) in a batch reaction showed that Cu-Cr (Ba) catalyst gave the highest conversion of 34% and selectivity of 84% to 1,2-PDO. In a continuous operation (23 g catalyst bed) the same catalyst showed higher conversion of glycerol and selectivity for 1,2-PDO of 65% and &gt; 90%, respectively, with an on-stream activity of similar to 800 h. Better performance in a continuous operation could be due to the in situ activation of the catalyst, suppression of glycerol cracking to ethylene glycol, as well as excessive hydrogenation of 1,2-PDO to 2-propanol due to lower contact time of 1.3 h as compared to that in a batch operation (5 h). Effects of various process parameters on conversion and selectivity also have been compared for batch and continuous operations.</p>1 aRode, Chandrashekhar, V1 aGhalwadkar, Ajay, A.1 aMane, R., B.1 aHengne, Amol, M.1 aJadkar, Sachin, T.1 aBiradar, Narayan, S.  uhttps://library.ncl.res.in/content/selective-hydrogenolysis-glycerol-12-propanediol-comparison-batch-and-continuous-process-001530nas a2200205   4500008004100000022001400041245013800055210006900193260007100262300001400333490000700347520069300354100002801047700002501075700002401100700002301124700002101147700002901168856012701197       2011                        eng d  a0888-588500aControl of competing hydrogenation of phenylhydroxylamine to aniline in a single-step hydrogenation of nitrobenzene to p-aminophenol	0 aControl of competing hydrogenation of phenylhydroxylamine to ani  a1155 16TH ST, NW, WASHINGTON, DC 20036 USAbAMER CHEMICAL SOCcMAY  a5478-54840 v503 a<p>Two steps involving catalytic hydrogenation of nitrobenzene to phenylhydroxylamine (PHA) in acid medium and its rearrangement to p-aminophenol (PAP) were studied separately in a batch reactor, using a well-characterized 3% Pt/C catalyst. The first step of hydrogenation of nitrobenzene to PHA could be carried out at 303 K and a H(2) pressure of 0.69 MPa with complete conversion of nitrobenzene, while the achieved selectivity to PHA was higher than 90% with some formation of aniline, even at lower temperature. The second step of PHA rearrangement to PAP could be achieved under a hydrogen atmosphere at elevated temperature of 353 K to give a maximum selectivity to PAP of 74%.</p>1 aNadgeri, Jayprakash, M.1 aBiradar, Narayan, S.1 aPatil, Priyanka, B.1 aJadkar, Sachin, T.1 aGarade, Ajit, C.1 aRode, Chandrashekhar, V.  uhttps://library.ncl.res.in/content/control-competing-hydrogenation-phenylhydroxylamine-aniline-single-step-hydrogenation-001844nas a2200277   4500008004100000022001400041245008500055210006900140260007300209300001200282490000700294520085200301653001601153653002901169653001501198653003301213653002401246653003701270100002101307700002501328700001801353700002301371700002401394700002901418856011901447       2011                        eng d  a0169-131700aLiquid phase oxidation of p-vanillyl alcohol over synthetic Co-saponite catalyst0 aLiquid phase oxidation of pvanillyl alcohol over synthetic Cosap  aPO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSbELSEVIER SCIENCE BVcAUG  a157-1630 v533 a<p>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.</p>10aCo-saponite10aCobalt oxide phase ratio10ap-Vanillin10ap-Vanillyl alcohol oxidation10aPorosity transition10aTemperature programmed reduction1 aGarade, Ajit, C.1 aBiradar, Narayan, S.1 aJoshi, S., M.1 aKshirsagar, V., S.1 aJha, Ratnesh, Kumar1 aRode, Chandrashekhar, V.  uhttps://library.ncl.res.in/content/liquid-phase-oxidation-p-vanillyl-alcohol-over-synthetic-co-saponite-catalyst-000802nas a2200169   4500008004100000022001400041245019200055210006900247260007300316300000800389490000700397100002900404700002100433700002500454700002300479856013000502       2011                        eng d  a0169-131700aReply to the comments of vicente et al. on ``liquid phase oxidation of p-vanillyl alcohol over synthetic co-saponite catalyst'' applied clay science (2010), doi:10.1016/j.clay.2010.10.0260 aReply to the comments of vicente et al on liquid phase oxidation  aPO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSbELSEVIER SCIENCE BVcJUN  a4320 v521 aRode, Chandrashekhar, V.1 aGarade, Ajit, C.1 aBiradar, Narayan, S.1 aKshirsagar, V., S.  uhttps://library.ncl.res.in/content/reply-comments-vicente-et-al-liquid-phase-oxidation-p-vanillyl-alcohol-over-synthetic-co-001610nas a2200193   4500008004100000022001400041245014000055210006900195260007100264300001600335490000700351520080300358100002101161700002301182700002801205700002501233700002901258856012901287       2012                        eng d  a0888-588500aSelectivity tuning options in hydrogenation of m-chloronitrobenzene to m-chloroaniline over mono- and bimetallic supported Pt catalysts0 aSelectivity tuning options in hydrogenation of mchloronitrobenze  a1155 16TH ST, NW, WASHINGTON, DC 20036 USAbAMER CHEMICAL SOCcDEC  a15564-155720 v513 a<p>Supported monometallic (Pt, Ni,) and bimetallic (Ni-Pt) catalysts were prepared for the selective liquid phase hydrogenation of m-chlronitrobenzene to m-chloroaniline (m-CAN). It was found that the use of sodium carbonate as an additive substantially reduced the extent of dehydrohalogenation in the case of monometallic, 1% Pt/C catalyst, to give the highest selectivity of 96% to m-CAN. Ni-Pt bimetallic catalyst although showed almost complete selectivity (&gt;99%) to m-chloroaniline; its activity was several fold lower than that of 1% Pt/C Na2CO3 system. However, compared with Ni monometallic catalyst, bimetallic Ni-Pt showed higher activity and selectivity due to the presence of electron rich surface metallic Pt stabilized by Ni having lower ionization potential compared with Pt.</p>1 aMane, Rasika, B.1 aPotdar, Aparna, S.1 aNadgeri, Jayprakash, M.1 aBiradar, Narayan, S.1 aRode, Chandrashekhar, V.  uhttps://library.ncl.res.in/content/selectivity-tuning-options-hydrogenation-m-chloronitrobenzene-m-chloroaniline-over-mono-001674nas a2200253   4500008004100000022001400041245012900055210006900184260005700253300001200310490000800322520076900330653001301099653001701112653002401129653001201153653001801165653002201183653000801205100002101213700002501234700002901259856013201288       2012                        eng d  a1011-372X00aSurface species of supported ruthenium catalysts in selective hydrogenation of levulinic esters for bio-refinery application0 aSurface species of supported ruthenium catalysts in selective hy  a233 SPRING ST, NEW YORK, NY 10013 USAbSPRINGERcJUN  a779-7870 v1423 a<p>Several supported noble metal catalysts were screened for the hydrogenation of methyl levulinate to gamma-valerolactone (GVL). Among these catalysts 5 % Ru/C showed the highest conversion of 95 % of methyl levulinate with 91 % selectivity to GVL. A detailed characterization was carried out using TPR, XRD, XPS and BET techniques. XPS studies revealed that higher extent of Ru-0 species in case of carbon supported Ru was responsible for its higher hydrogenation activity as compared to Ru on other supports. Effect of process parameters such as temperature, H-2 pressure, catalyst and substrate concentration and metal loading on methyl LA conversion and selectivity to GVL also has been studied. 5 % Ru/C catalyst was found to be stable up to five reuses.</p>10a5 % Ru/C10aBiofeedstock10agamma-Valerolactone10aH-2-TPR10aHydrogenation10aMethyl levulinate10aXPS1 aHengne, Amol, M.1 aBiradar, Narayan, S.1 aRode, Chandrashekhar, V.  uhttps://library.ncl.res.in/content/surface-species-supported-ruthenium-catalysts-selective-hydrogenation-levulinic-esters-bio-001810nas a2200265   4500008004100000022001400041245009000055210006900145260007100214300001200285490000600297520089200303653002301195653001801218653001101236653001801247653001001265100002501275700002101300700002501321700002801346700002501374700002901399856011601428       2014                        eng d  a2168-048500aSingle-pot formation of THFAL via catalytic hydrogenation of FFR over Pd/MFI catalyst0 aSinglepot formation of THFAL via catalytic hydrogenation of FFR   a1155 16TH ST, NW, WASHINGTON, DC 20036 USAbAMER CHEMICAL SOCcFEB  a272-2810 v23 a<p>Furfural (FFR) was selectively hydrogenated in a single pot to tetrahydrofurfuryl alcohol (THFAL) over a Si MFI molecular sieve supported Pd catalyst. Studies on catalyst screening revealed that both the metal function and the support were critical for directing the selectivity to the ringhydrogenated product, THFAL. The structural feature of MFI as shown by XRD was completely retained in the used sample of the 3% Pd/MFI catalyst confirming its stability under reaction conditions. XRD, along with SEM characterization of the used samples, established retention of morphology of the structured silicate, suggesting a strong interaction between hexagonal porous silicate and Pd particles. The complete conversion of FFR with an enhanced selectivity of 95% to THFAL could be achieved by recycling the crude of the first hydrogenation experiment over the same 3% Pd/MFI catalyst.</p>10aBiomass conversion10aHydrogenation10aPd/MFI10aRecyclability10aTHFAL1 aBiradar, Narayan, S.1 aHengne, Amol, M.1 aBirajdar, Shobha, N.1 aNiphadkar, Prashant, S.1 aJoshi, Praphulla, N.1 aRode, Chandrashekhar, V.  uhttps://library.ncl.res.in/content/single-pot-formation-thfal-catalytic-hydrogenation-ffr-over-pdmfi-catalyst-001248nas a2200181   4500008004100000022001400041245012800055210006900183260011000252300001400362490000600376520045600382100002100838700002500859700002500884700002900909856012800938       2014                        eng d  a2046-206900aSurface synergism of an Ag-Ni/ZrO2 nanocomposite for the catalytic transfer hydrogenation of bio-derived platform molecules0 aSurface synergism of an AgNiZrO2 nanocomposite for the catalytic  aTHOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLANDbROYAL SOC CHEMISTRYcFEB  a9730-97360 v43 a<p>Levulinic acid was completely and selectively converted to GVL, in the presence of formic acid over an Ag-Ni/ZrO2 catalyst. The synergism between Ag and Ni in transfer hydrogenation eliminates the need for external hydrogen, making the process safer. The magnetic nature of the catalyst offers easy recovery for efficient recycling. This approach is standardized for the hydrogenation of several C-3-C-6 platform molecules in an aqueous medium.</p>1 aHengne, Amol, M.1 aMalawadkar, Atul, V.1 aBiradar, Narayan, S.1 aRode, Chandrashekhar, V.  uhttps://library.ncl.res.in/content/surface-synergism-ag-nizro2-nanocomposite-catalytic-transfer-hydrogenation-bio-derived-001764nas a2200193   4500008004100000022001400041245011900055210006900174260000800243300001400251490000700265520104700272100002501319700002101344700002501365700002101390700002901411856013001440       2014                        eng d  a1083-616000aTailoring the product dstribution with batch and continuous process options in catalytic hydrogenation of furfural0 aTailoring the product dstribution with batch and continuous proc  cNOV  a1434-14420 v183 a<p>Various noble metal catalysts were screened in a batch operation for a furfural (FFR) single-step decarbonylation and hydrogenation reaction to obtain THF in high selectivity. Among these, the 3% Pd/C showed complete FFR conversion with a total of 80% selectivity to ring hydrogenated products including tetrahydrofuran (THF). The order of activity exhibited by other noble metals was Pt/C &gt; Re/C &gt; Ru/C. Although Pt/C exhibited the highest activity, its decarbonylation and ring hydrogenation ability were the least (24%) with a major product selectivity of 66% to furfuryl alcohol (FAL). Similarly, the Cu catalyst gave almost complete selectivity to FAL. In a continuous operation (23 g catalyst bed), the 3% Pd/C catalyst showed higher selectivity of &gt;40% compared to THF alone with complete FFR conversion and on-stream activity of similar to 100 h. The reaction pathway elucidated from some control experiments revealed that the decarbonylation of FFR to furan over the Pd/C catalyst is a prerequisite for THF formation.</p>1 aBiradar, Narayan, S.1 aHengne, Amol, A.1 aBirajdar, Shobha, N.1 aSwami, Rameshwar1 aRode, Chandrashekhar, V.  uhttps://library.ncl.res.in/content/tailoring-product-dstribution-batch-and-continuous-process-options-catalytic-hydrogenation02258nas a2200229   4500008004100000022001400041245010600055210006900161260011000230300001400340490000600354520135600360100001401716700002401730700002201754700002201776700001901798700002501817700002501842700002901867856013201896       2014                        eng d  a2044-475300aTriple nanocomposites of CoMn2O4, Co3O4 and reduced graphene oxide for oxidation of aromatic alcohols0 aTriple nanocomposites of CoMn2O4 Co3O4 and reduced graphene oxid  aTHOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLANDbROYAL SOC CHEMISTRYcMAY  a1771-17780 v43 a<p>A composite of reduced graphene oxide (RGO) with oxides of manganese and cobalt together was prepared by a solvothermal method. During synthesis, both the reduction of graphene oxide as well as the growth of nanorod shaped CoMn2O4 and Co3O4 occurred simultaneously having a crystallite size of similar to 8 nm calculated from X-ray diffraction (XRD). The as-obtained triple nanocomposite material designated as RGO-MnCoO exhibited excellent activity for the liquid phase aerobic oxidation of aromatic alcohols under base-free conditions selectively giving the corresponding aldehydes (&gt;85%). RGO loading was varied in the range of 1-10%, among which 1% RGO-MnCoO showed maximum catalytic activity enhancement of 24% as compared to the bare mixed oxide (MnCo-MO) for the oxidation of vanillyl alcohol. HR-TEM of RGO-MnCoO revealed that it was a composite material having uniform nanotubes of similar to 25 nm length and 6 nm diameter with a fringe pattern showing the (103) and (004) planes and lattice spaces of 0.26 nm and 0.22 nm, respectively, for the spinel CoMn2O4. The detailed studies on the morphology, size and composition of the as-prepared RGO-MnCoO nanocomposite by XRD, XPS, N-2-adsorption/desorption and O-2-TPD techniques were used to understand the role of RGO in the enhancement of catalytic activity for oxidation reaction.</p>1 aJha, Ajay1 aMhamane, Dattakumar1 aSuryawanshi, Anil1 aJoshi, Sameer, M.1 aShaikh, Parvez1 aBiradar, Narayan, S.1 aOgale, Satishchandra1 aRode, Chandrashekhar, V.  uhttps://library.ncl.res.in/content/triple-nanocomposites-comn2o4-co3o4-and-reduced-graphene-oxide-oxidation-aromatic-alcohols-002367nas a2200181   4500008004100000245010700041210006900148260000800217300001600225490000700241520169400248100002201942700002101964700002501985700002902010700002402039856012202063       2016                        eng d00aReductive cyclization of levulinic acid to gamma-valerolactone over non-noble bimetallic nanocomposite0 aReductive cyclization of levulinic acid to gammavalerolactone ov  cDEC  a13032-130390 v553 aBimetallic nanoparticles have diverse applications in catalytic processes owing to the differences in individual properties that contribute to their increased catalytic activity. To further improve the efficiency, they are dispersed in an inert support that enhances the catalytic activity toward organic transformations. In this study, we report simple, facile, and cost-effective chemical route for the fabrication of nanocomposites with Fe-Ni bimetallic nanoparticles supported on montmorillonite (MMT) possessing variation in the Fe and Ni content. These composites are characterized with X-ray diffraction, transmission electron microscopy surface area, and NH3-TPD. Fe Ni bimetallic nanoparticles are well-dispersed within MMT structure having particle sizes of about 30-40 nm. Among various compositions of Fe-Ni/MMT catalysts, composite with 25% Fe and 25% Ni exhibits >99% LA conversion with 98% selectivity to GVL within 1 h. IPA is found to be better solvent for levulinic acid (LA) to gamma-valerolactone (GVL) conversion, while substantial leaching of iron takes place when water is used as a solvent. It is observed that bimetallic sites are responsible for reduction of LA, while strong acidic sites of MMT are favoring subsequent cyclization to GVL. XPS analysis of fresh and reused Fe-Ni/MMT composites suggest that the catalyst surface does not undergo any chemical change during successive cycles, and the catalytic activity is retained up to six cycles. The plausible mechanism for LA to GVL conversion involves reductive cyclization processes through formation of levulinate ester that undergoes lactonization due to synergism in bimetallic nanoparticles and MMT clay.1 aKadu, Brijesh, S.1 aHengne, Amol, M.1 aBiradar, Narayan, S.1 aRode, Chandrashekhar, V.1 aChikate, Rajeev, C.  uhttps://library.ncl.res.in/content/reductive-cyclization-levulinic-acid-gamma-valerolactone-over-non-noble-bimetallic01446nas a2200253   4500008004100000022001400041245009400055210006900149260005700218300001400275490000800289520056900297653001000866653001300876653002100889653001700910653002700927100002500954700002100979700001901000700001801019700002901037856012601066       2016                        eng d  a1011-372X00aSingle pot transfer hydrogenation and aldolization of furfural over metal oxide catalysts0 aSingle pot transfer hydrogenation and aldolization of furfural o  a233 SPRING ST, NEW YORK, NY 10013 USAbSPRINGERcAUG  a1611-16190 v1463 a<p>One pot catalytic transfer hydrogenation (CTH) of furfural to furfuryl alcohol (FAL) by using hydrogen producing alcohols and simultaneous aldolization of carbonyl compounds produced during CTH, with furfural was achieved over non-noble metal oxides with bifunctional sites. Basic sites of MgO responsible for abstraction of proton showed complete conversion of furfural to give FAL and C8 monomer in a ratio of 3:1, respectively, the later altered to 1:1 by incorporating Al into MgO. Catalyst stability was established by its four cycles study. [GRAPHICS]</p>10aAldol10afurfural10aFurfuryl alcohol10aMetal oxides10atransfer hydrogenation1 aBiradar, Narayan, S.1 aHengne, Amol, M.1 aSakate, S., S.1 aSwami, R., K.1 aRode, Chandrashekhar, V.  uhttps://library.ncl.res.in/content/single-pot-transfer-hydrogenation-and-aldolization-furfural-over-metal-oxide-catalysts02168nas a2200193   4500008004100000022001400041245011200055210006900167260011000236300001600346490000600362520135400368100002101722700002201743700002501765700002401790700002901814856013101843       2016                        eng d  a2046-206900aTransfer hydrogenation of biomass-derived levulinic acid to gamma-valerolactone over supported Ni catalysts0 aTransfer hydrogenation of biomassderived levulinic acid to gamma  aTHOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLANDbROYAL SOC CHEMISTRYcJUN  a59753-597610 v63 a<p>A sustainable process of catalytic transfer hydrogenation (CTH) of levulinic acid (LA) to gamma-valerolactone (GVL) was investigated over Ni on various supports (Al2O3, ZnO, MMT and SiO2) in the presence of isopropanol (IPA) as the H-donor. Among these, the montmorillonite (MMT) supported Ni catalyst showed almost complete LA conversion (&gt;99%) and selectivity (&gt;99%) to GVL within 1 h. XRD and XPS results showed that the concentration of the metallic species significantly enhanced (two to four times) in the recovered sample as compared to the freshly prepared Ni/MMT. This was due to the in situ reduction of Ni2+ species present on the catalyst surface, through liberated H-2 under the reaction conditions. The strong acid strength of MMT, evidenced by NH3-TPD and py-IR, facilitated the esterification of LA as well as cyclization to GVL. The conversion-selectivity pattern was found to decrease in the IPA-water mixture while, it remained unchanged in the IPA-acetone mixture. Our catalyst could be efficiently recycled up to five times with consistent CTH activity and selectivity to GVL. The plausible mechanism of LA to GVL conversion involves the formation of a levulinate ester with IPA that favours its simultaneous hydrogenation and cyclization in a spontaneous manner to give GVL and regenerating IPA for sustainability.</p>1 aHengne, Amol, M.1 aKadu, Brijesh, S.1 aBiradar, Narayan, S.1 aChikate, Rajeev, C.1 aRode, Chandrashekhar, V.  uhttps://library.ncl.res.in/content/transfer-hydrogenation-biomass-derived-levulinic-acid-gamma-valerolactone-over-supported-ni