Biodiesel derived glycerol hydrogenolysis to 1,2-propanediol on Cu/MgO catalysts

• Published in: Bioresource technology 2010-09, Vol.101 (18), p.7088-7092
• Main Authors: Yuan, Zhenle, Wang, Junhua, Wang, Lina, Xie, Weihui, Chen, Ping, Hou, Zhaoyin, Zheng, Xiaoming
• Format: Article
• Language: English
• Subjects: 1,2-Propanediol; Biodiesel; Biofuel production; Biofuels - analysis; Biological and medical sciences; Biotechnology; Catalysis; CATALYSTS; Conversion; Copper; Copper - chemistry; COPPER OXIDE; Energy; Fundamental and applied biological sciences. Psychology; Glycerol; Glycerol - chemical synthesis; Glycerols; HYDROGEN; Hydrogenolysis; Hydrolysis; Industrial applications and implications. Economical aspects; MAGNESIUM OXIDE; Magnesium Oxide - chemistry; PARTICLE SIZE AND SHAPE; PROPANE; Propylene Glycol - chemistry
• ISSN: 0960-8524; 1873-2976
• DOI: 10.1016/j.biortech.2010.04.016

Hydrogenolysis of biodiesel derived glycerol to 1,2-propanediol (1,2-PDO) has attracted much attention in recent years. In this work, glycerol hydrogenolysis to 1,2-PDO was performed over CuO/MgO catalysts prepared by impregnation and coprecipitation at 180 °C and 3.0 MPa H 2. It was found that the Cu(15)/MgO catalyst prepared by coprecipitation had the best activity. The conversion of glycerol and the selectivity of 1,2-PDO over Cu(15)/MgO reached 72.0% and 97.6%, respectively. And the conversion of glycerol was further increased to 82.0% when small amount of NaOH was added in the reaction mixture. Those highly active catalysts were characterized by X-ray diffraction, transmission electron microscopy, N 2-adsorption and temperature-programmed reduction with H 2. Characterization results revealed that the activity of the prepared catalysts depended strongly on the particle sizes of both Cu and MgO. Catalysts that have smaller sized Cu and MgO particles are more active for glycerol hydrogenolysis.