01529nas a2200241 4500008004100000022001400041245012700055210006900182260000800251300001100259490000800270520068800278653002200966653000900988653001900997653002001016653001801036653002701054100002901081700002501110700002001135856013201155 2022 eng d a1566-736700aCe promoted Cu/?-Al2O3 catalysts for the enhanced selectivity of 1,2-pro-panediol from catalytic hydrogenolysis of glucose0 aCe promoted CuAl2O3 catalysts for the enhanced selectivity of 12 cMAY a1064470 v1653 a

Ce promoted Cu/gamma-Al2O3 catalysts were prepared with varying amounts of Cu (x = 0-10 wt%) and Ce (y = 0-15 wt%). The prepared catalysts were characterized and tested for the conversion of aqueous glucose (5 wt%) to 1,2propanediol in a batch reactor. 10%Ce-8%Cu/gamma-Al2O3 & nbsp;showed the complete conversion of glucose with 62.7% selectivity of 1,2-propanediol and total glycols (1,2-propanediol, ethylene glycol & 1,2-butanediol) of 81% at milder reaction conditions. Cu facilitated the hydrogenation activity and Ce loading optimize the acid/base sites of Cu/gamma-Al2O3 which obtain high selectivity of 1, 2-propanediol. Catalyst reusability is reported.

10a2-Propanediol

10a

110aCu-Ce catalyst10aethylene glycol10aGamma alumina10aGlucose hydrogenolysis1 aKirali, Arun, Arunima Ba1 aSreekantan, Sreejith1 aMarimuthu, Banu uhttps://library.ncl.res.in/content/ce-promoted-cu-al2o3-catalysts-enhanced-selectivity-12-pro-panediol-catalytic-hydrogenolysis02031nas a2200217 4500008004100000022001400041245018000055210006900235260000900304490000700313520118900320653002901509653001601538653002001554653001301574100002501587700003001612700002601642700002001668856012501688 2023 eng d a1861-472800aInvestigation of the effect of zeolite supports and the role of W-species for one-pot catalytic conversion of cellulose to ethylene glycol: theoretical & experimental studies.0 aInvestigation of the effect of zeolite supports and the role of  cFEB 0 v183 a

Endeavors were made to study the influence of various zeolite (HY, NaY, NaZSM-5 and HZSM-5) supports with (Al)-Ni-W metal combination catalysts for the ethylene glycol (EG) production, selectively from cellulose. From the experimental results ZSM-5 (NaZSM-5/73.3% & HZSM-5/67.7%) support is superior over HY & NaY support in selective EG production from cellulose. It was understood that W- species with oxygen vacancies (WO3-x, XPS analysis) plays an important role in producing the glycolaldehyde (GA) intermediate (via C-C cleavages), which on hydrogenation over Ni- sites selectively produce EG. Further, the studies based on the Density Functional Theory (DFT) were conducted to substantiate the involvement of the WO3-x species in the reaction. The adsorption energies and structural changes establish that the C-2-C-3 bond of the glucose elongates and thereby activates on adsorbing to WO3-x sites supporting the formation of GA. Activation of GA on Ni- sites is distinguished by an increase of 0.1 angstrom in C=O bond length, which facilitates the hydrogenation of C=O resulting in EG. The reaction pathway is explained through an analysis of CDD and DOS.

10aCellulose hydrogenolysis10aDFT studies10aethylene glycol10azeolites1 aSreekantan, Sreejith1 aSingh, Chandrodai, Pratap1 aKrishnamurty, Sailaja1 aMarimuthu, Banu uhttps://library.ncl.res.in/content/investigation-effect-zeolite-supports-and-role-w-species-one-pot-catalytic-conversion