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Vapour phase hydrogenolysis of glycerol to propanediols over Cu/ SBA ‐15 catalysts
Author(s) -
Harisekhar Mitta,
Pavan Kumar Vanama,
Shanthi Priya Samudrala,
Chary Komandur VR
Publication year - 2015
Publication title -
journal of chemical technology and biotechnology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.64
H-Index - 117
eISSN - 1097-4660
pISSN - 0268-2575
DOI - 10.1002/jctb.4728
Subject(s) - hydrogenolysis , catalysis , copper , glycerol , dispersion (optics) , oxide , mesoporous material , copper oxide , decomposition , inorganic chemistry , chemistry , phase (matter) , chemical engineering , nuclear chemistry , materials science , organic chemistry , physics , optics , engineering
BACKGROUND Biomass‐derived glycerol is emerging as a renewable, cheap and versatile feedstock for the production of a variety of chemicals and fuels. RESULTS Cu catalysts with varying copper loadings ranging from 2.5 to 20 wt% supported on SBA ‐15 were investigated for the vapour phase hydrogenolysis of glycerol to propanediols. The dispersion of Cu and copper metal area on mesoporous SBA ‐15 was determined by pulse N 2 O decomposition measurements. The X‐ray diffraction patterns suggest that the presence of highly dispersed copper oxide species at lower Cu loadings (≤ 5Cu ) and as crystalline CuO phase at higher Cu loadings (≥10 wt% Cu). The acidity of the catalysts measured by NH 3 ‐TPD method reveals that the acidity of the samples increases with increase of copper loading up to 5 wt% and decreases at higher copper loadings. The catalytic functionalities during the vapour phase hydrogenolysis of glycerol to propanediols are correlated with the copper oxide dispersion and also with the acidic properties CONCLUSIONS In summary, 5Cu / SBA ‐15 catalyst was found to consist of highly dispersed copper oxide on the support, evidenced by XRD , TPR and N 2 O decomposition studies. This catalyst exhibits high glycerol conversion (90%) and 84% selectivity of 1,2‐propanediol. The activity results are well correlated with Cu dispersion and acidity of the catalysts. © 2015 The Authors. Journal of Chemical Technology & Biotechnology published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry.