Journal
CATALYSIS TODAY
Volume 302, Issue -, Pages 217-226Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.cattod.2017.02.035
Keywords
1,3-Propanediol; gamma-Valerolactone; Glycerol; Levulinic acid; Hydrogenolysis; Hydrogenationa
Funding
- Natural Science of Foundation China [U1662131, 21206192, 21576140]
- Natural Science Foundation of Tianjin [14JCYBJC20000]
- Science Foundation of China University of Petroleum-Beijing [C201603]
- MOE innovation Team of China [IRT13R30, IRT13022]
- Open Project of Key Lab Adv Energy Mat Chem (Nankai Univ)
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1,3-propanediol (1,3-PDO) and gamma-valerolactone (GVL) were simultaneously obtained via the hydrogenolysis of glycerol in levulinic acid (LA) using Ru/C catalysts. Ru/C catalyst exhibited a high LA conversion (similar to 99%) and a high GVL selectivity (similar to 99%) for the hydrogenation of LA; while a low conversion (similar to 11%) and little selectivity of 1,3-PDO for the hydrogenolysis of glycerol. LA promoted the hydrogenolysis of glycerol over Ru/C catalyst, in which LA catalyzed dehydration of glycerol into acetol (precursor of 1,2-propanediol( 1,2-PDO)), and glycerol acetalization with the hydrogenated GVL into cyclic acetals, resulting in the formation of 1,3-PDO. A reaction scheme involves the formation of cyclic acetal ethers between GVL and glycerol was proposed to explain the product distributions in the one-pot synthesis of 1,3-PDO and GVL. 64.5% conversion of glycerol and 35.8% selectivity of 1,3-PDO together with 99.1% conversion of LA and 85.8% selectivity of GVL were obtained during one-pot converting glycerol and LA with 3.0 MPa H-2 at 200 degrees C for 6 h. We reported an effective strategy for the preparation of 1,3-PDO by selective hydrogenolysis of dioxan originated from glycerol with aldehydes or ketones. (C) 2017 Elsevier B.V. All rights reserved.
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