481344 Fluidized Bed Catalytic Glycerol Hydrodeoxygenation to 1,3-Propanediol

Monday, November 14, 2016: 1:15 PM
Franciscan B (Hilton San Francisco Union Square)
Mahesh Edake1,2, Jean-Luc Dubois3, Mohammad Jaber Darabi Mahboub1 and Gregory Patience4, (1)Chemical Engineering, Polytechnique Montreal, Montreal, QC, Canada, (2)Chemical Engineering, University of Ottawa, Ottawa, ON, Canada, (3)CRRA, Arkema, Pierre-BĂ©nite, France, (4)Department of Chemical Engineering, Ecole Polytechnique de Montreal, Montreal, QC, Canada

1,3 propandiol (1,3-PDO) is a monomer for commercial polyesters like Corterra® (Shell) and Sorona® (DuPont). Glycerol is an attractive feedstock for this monomer because of its low cost. Here we propose a gas-phase hydrodeoxygenation process in which we atomize a dilute solution of glycerol to a fluidized bed of of Pt/WO3/Al2O3 operating above 240 °C and atmospheric pressure. Gas-solids fluidized beds have excellent heat transfer properties that vaporize the droplets within milliseconds thereby minimizing thermal degradation of the glycerol. After 2 h at 260 °C, 1,3-PDO yield reached 14%. The other products included 1,2-PDO (18%), 1-propanol (28%), and 2-propanol (15%). We postulate that glycerol first dehydrates to acrolein, then rehydrates to 3-hydroxypropanal followed by the hydrogenation to 1,3-PDO. The yield of other compounds (acrolein, ethylene glycol, propane, and acetone) increased at higher operating temperatures.

Extended Abstract: File Not Uploaded