EUBCE 2026 - Piet HASSENSTEIN - Optimization of the Glycerol Valorization to 1,2-Propanediol Via a Novel, Two-Step Separated Hydrogenolysis Approach

Optimization of the Glycerol Valorization to 1,2-Propanediol Via a Novel, Two-Step Separated Hydrogenolysis Approach

Short Introductive summary

This study, conducted within the CRC 1615 SMART-reactors, focuses on the valorization of glycerol into the valuable platform chemical 1,2-propanediol (1,2-PDO). The ultimate goal of the development is the construction and operation of an autonomous, multipurpose SMART reactor capable of converting renewable biomass to platform chemicals. Glycerol, a biodiesel by-product, undergoes hydrogenolysis involving dehydration and hydrogenation steps. The research investigates the kinetics of these sub-reactions to optimize process conditions and to suppress side reactions such as ethylene glycol formation. A novel two-step approach was developed, separating dehydration and hydrogenation under distinct reaction conditions, resulting in higher yield and selectivity of 1,2-PDO compared to the traditional single-step approach. Furthermore, a kinetic model of the glycerol hydrogenolysis sub-reactions was developed to optimize the hydrogenolysis process via predictive modelling. These results support the design of a SMART, in-situ monitored reactor capable of autonomous operation, advancing sustainable biomass valorization, and enabling adaptation to varying crude glycerol properties.

P. Hassenstein, University of Hamburg, GERMANY
D. Lumpp, University of Hamburg, GERMANY
J.D. Krueger, University of Hamburg, GERMANY
L. Paschalidis, Hamburg University of Technology, GERMANY
M. Skiborowski, Hamburg University of Technology, GERMANY
J. Albert, University of Hamburg, GERMANY