Open AccessOxidation of Glycerol with Oxygen Molecules as the Oxidant over Activated Clay Material Catalysts
Author(s) -
L. S. Ochonogor,
Vincent E Efeovbokhan,
Joel Sankar,
Egwu E. Kalu
Publication year - 2019
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1378/3/032036
Subject(s) - glyceric acid , glycerol , oxalic acid , catalysis , chemistry , calcination , formic acid , selectivity , nuclear chemistry , oxygen , inorganic chemistry , organic chemistry
Interest in glycerol oxidation to more useful products has risen significantly over the years. This has led to the development of several catalysts some of which are scarce, uneconomical and environmentally unfriendly. In this research, two catalysts prepared from red earth - ‘A1’ (calcined at 500°c) and ‘A2’ (calcined at 500°c and dealuminated) were characterized using x-ray fluorescence (XRF) and used to oxidize glycerol with O2 molecules for 240 mins. The XRF results showed that Al 2 O 3 (31.3%), SiO 2 (47.9%) and Fe 2 O 3 (16.05%) were the predominant components in ‘A1’ while ‘A2’ showed a marked significant difference in Al 2 O 3 (19.4%), SiO 2 (72.1 %) and Fe 2 O 3 (0 %). The selectivities of the oxidation products with A1 were 18.8 % glyceric acid (GLA), 13.1 % lactic acid (LCA), 1.66 % oxalic acid (OXA) and 1.24 % formic acid (FMA), while for A2 they were (20.4%) GLA and (17%) LCA. 88.1% glycerol was converted but selectivity towards any of the products was low.