Abstract
A Ni-Cu-SiO2 nanocomposite was studied as a catalyst for vapor-phase glycerol hydrogenation to produce 1,2-propanediol (1,2-PDO). Substitution of a small amount (3wt%) of Ni for Cu is beneficial for decreasing the Cu particle size, which would be advantageous for attaining higher 1,2-PDO selectivity and higher glycerol conversion. 92% 1,2-PDO selectivity and 100% glycerol conversion were obtained at 220°C, 30bar, and a weight hourly space velocity of 0.5h−1 over Ni(3)-Cu(77)-SiO2, which were nearly identical to those obtained with the conventional copper chromite (CuO-Cr2O3) catalyst. Therefore, the present Ni(3)-Cu(77)-SiO2 nanocomposite is regarded as a green and efficient catalyst for glycerol conversion into more valuable 1,2-PDO.
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