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Hydrogenolysis of Glycidol as an Alternative Route to Obtain 1,3‐Propanediol Selectively Using MO x ‐Modified Nickel‐Copper Catalysts Supported on Acid Mesoporous Saponite
Author(s) -
Gebretsadik Fiseha B.,
Llorca Jordi,
Salagre Pilar,
Cesteros Yolanda
Publication year - 2017
Publication title -
chemcatchem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.497
H-Index - 106
eISSN - 1867-3899
pISSN - 1867-3880
DOI - 10.1002/cctc.201700536
Subject(s) - hydrogenolysis , glycidol , catalysis , bimetallic strip , yield (engineering) , chemistry , glycerol , propanediol , nuclear chemistry , nickel , mesoporous material , inorganic chemistry , materials science , organic chemistry , metallurgy
Ni and Cu mono‐ and bimetallic catalysts modified with various types of acid oxides MO x (M=Mo, V, W, and Re) were tested for the hydrogenolysis of glycidol as an alternative route to the hydrogenolysis of glycerol to obtain 1,3‐propanediol (1,3‐PrD). Characterization results revealed that the presence of modifiers affected the dispersion and reducibility of the NiO particles and the strength and amount of acid sites. Among the modifiers tested, Re led to the highest activity, a high propanediols selectivity, and the highest 1,3‐PrD/1,2‐propanediol (1,2‐PrD) ratio. The Ni‐Cu/Re ratio was optimized to improve the catalytic activity. The best catalytic result, with a 46 % 1,3‐PrD yield and a 1,3‐PrD/1,2‐PrD ratio of 1.24, was obtained if the monometallic Ni catalyst at 40 wt % loading and modified with 7 wt % Re was used at 393 K and 5 MPa H 2 pressure after 4 h of reaction. The overall 1,3‐PrD yield starting from glycerol and assuming a two‐step synthesis (glycerol→glycidol→1,3‐PrD) and a yield of 78 % for the first step would be 36 %. This 1,3‐PD yield is the highest for a reaction catalyzed by a non‐noble metal and is comparable to the direct hydrogenolysis of glycerol using noble metal catalysts at a longer time and a high H 2 pressure.