Premium
Effect of Ru Precursors and Reduction Conditions on Catalyst Performance in Glycerol Hydrogenolysis
Author(s) -
Mane Rasika B.,
Patil Shivanand T.,
Gurav Hanmant,
Rayalu Sadhana S.,
Rode Chandrashekhar V.
Publication year - 2017
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201700049
Subject(s) - hydrogenolysis , selectivity , catalysis , chemistry , glycerol , bond cleavage , methanol , cleavage (geology) , chloride , inorganic chemistry , medicinal chemistry , nuclear chemistry , organic chemistry , materials science , fracture (geology) , composite material
Catalyst precursors, their reduction protocols and reaction conditions integrally influenced the activity and selectivity pattern in glycerol hydrogenolysis. Ru prepared from chloride precursor (Ru(Cl)/C−B) showed the maximum selectivity to C−C cleavage products EG (56 %) and methanol (17 %) with 23 % selectivity to 1,2‐PDO. While, that prepared from nitrosyl precursor (Ru(n)/C−B) showed higher selectivity to 1,2‐PDO (44 %) and lower to EG (42 %). The catalysts prepared either with chloride or nitrosyl precursors but reduced by H 2 showed lower glycerol conversion (10‐11 %) than NaBH 4 reduced catalysts. For these catalysts, 1,2‐PDO selectivity increased to 40–43 % along with the major formation of 2‐propanol (48‐49 %) and very less selectivities to C−C cleavage products. The lower activity of the H 2 reduced catalysts can be related to their lower acidity and the bigger Ru metal particle size (3‐5 nm). For Ru(Cl)/C−B catalyst, glycerol conversion increased from 28–97 % with a rise in temperature from 180 to 250 o C also favoring 1,2‐PDO selectivity; indicating that C−O bond cleavage was favoured in comparison to C−C scission, at higher temperature.