02303nas a2200229   4500008004100000022001400041245013600055210006900191260009500260300001200355490000700367520140500374653001201779653001601791653002801807653001601835653002101851100002901872700001901901700002201920856013101942       2015                        eng d  a0263-876200aCatalytic upgrading of citric acid to environmental friendly tri-butyl citrate plasticizer over ultra stable phosphonated Y zeolite0 aCatalytic upgrading of citric acid to environmental friendly tri  a165-189 RAILWAY TERRACE, DAVIS BLDG, RUGBY CV21 3HQ, ENGLANDbINST CHEMICAL ENGINEERScJUN  a212-2190 v983 a<p>The catalytic synthesis of non-toxic/eco-friendly tributyl citrate (TBC) plasticizer by esterification of renewable citric acid (CA) with butanol would be completely sustainable route. In this context, catalytic performance of parent ultra stable Y (USY) and phosphonated USY catalysts were investigated for TBC synthesis. Parent USY and phosphonated USY catalysts were characterized by powder X-ray diffraction (XRD), N-2 adsorption-desorption, NH3 temperature programmed desorption (TPD), pyridine-Fourier Transform Infrared Spectroscopy (FTIR), FTIR, SEM, ICP. The influence of various process parameters such as phosphorous (P) loading (0 to 4 wt/%), catalyst loading (5-25%), molar ratio of CA to n-butanol (1:4 to 1:12), reaction temperature (383-423 K) and reaction time (1-5 h) have been investigated over USY catalyst with aim to maximize CA conversion and TBC yield. Amongst the studied catalysts, the 2% (w/w) P/USY was found to be highly potential catalyst with complete CA conversion (100%) and 93% TBC yield. The present method of using 2% (w/w) P/USY catalyst for the synthesis of TBC would be environmentally benign in the context of bio-renewable synthetic route, high catalytic activity, non-toxic product, long term stability and reusability of catalyst (five catalytic cycles). (c) 2015 The Institution of Chemical Engineers. Published by Elsevier B.V. All rights reserved,</p>10aButanol10aCitric acid10aheterogeneous catalysis10aPlasticizer10aTributyl citrate1 aNandiwale, Kakasaheb, Y.1 aGogoi, Pranjal1 aBokade, Vijay, V.  uhttps://library.ncl.res.in/content/catalytic-upgrading-citric-acid-environmental-friendly-tri-butyl-citrate-plasticizer-over-002074nas a2200229   4500008004100000022001400041245017700055210006900232260000900301300001400310490000700324520117400331653002101505653002801526653001801554653003701572653003001609100002201639700001901661700003301680856013101713       2021                        eng d  a1861-472800aActive and recyclable gold metal nanoparticles catalyst supported on nitrogen-doped mesoporous carbon for chemoselective hydrogenation of cinnamaldehyde to cinnamyl alcohol0 aActive and recyclable gold metal nanoparticles catalyst supporte  cSEP   a2702-27220 v163 aSeveral supported gold metal catalysts with different Au nanoparticles sizes were prepared and evaluated for the chemoselective hydrogenation of cinnamaldehyde (CA) to cinnamyl alcohol (CAL). To investigate the structure-activity relationship, stability of catalyst, heterogeneity and recyclability, the structural characteristics of materials and Au catalysts (fresh and spent catalysts) were studied by employing variety of physico-chemical techniques. The interrelationship among Au nanoparticles size (nm) with turnover frequency (h(-1)) of Au catalysts has also been explored. Among the various Au catalysts tested, nitrogen-doped mesoporous carbon (NMC) supported Au catalyst having homogeneously dispersed (78.8%) Au nanoparticles (1.6 nm) synthesized by sol-immobilization method (Au-NMC-SI) demonstrated improved catalytic activity affording 78% CAL selectivity and 94.2% CA conversion without using any promoter. Moreover, Au-NMC-SI catalyst exhibited good recyclability and stability. The catalyst synthesis approach described in this investigation opens up a novel strategy for the design of highly efficient metal nano-catalysts supported on NMC materials.10aAu Nanoparticles10aheterogeneous catalysis10aHydrogenation10aNitrogen-doped mesoporous carbon10aSupport-Metal interaction1 aNagpure, Atul, S.1 aGogoi, Pranjal1 aChilukuri, Satyanarayana, V.  uhttps://library.ncl.res.in/content/active-and-recyclable-gold-metal-nanoparticles-catalyst-supported-nitrogen-doped-mesoporous