The depleting fossil fuel reserves and increasing problems of environmental pollution have accelerated the development and utilization of renewable energy. Biomass resources, as the only widely distributed and accessible renewable organic carbon raw materials in the world, have attracted worldwide attention. In this context, hydrogenation of bio-derived polyols (glycerol, xylitol, sorbitol, etc.) is an important way to convert biomass into high value-added chemicals. Aqueous phase hydrogenation process is considered to be the most promising route for biomass conversion. But high temperatures (&gt; 400 oC) and high H2 pressure (&gt; 4 MPa) make the side reactions very intense, leading to poor atomic utilization economics. The operating conditions of the catalytic transfer hydrogenolysis process are much milder, using H2 generated from water or renewable resources, so the energy consumption is small, the atomic utilization rate is high (~100%) and the environmental pollution is small. In this paper, we designed a RuCo catalyst loaded on activated carbon for transfer hydrogenolysis of glycerol to 1,2-propanediol. In 200 °C, nitrogen atmosphere, glycerol conversion rate and 1,2-propanediol selectivity are 40.5% and 72.3%, respectively. By adjusting the content of Co, the lattice parameter of RuCo oxide is tuned, and the effect of lattice distortion on RuCo electron structure and metal-hydrogen interaction strength is studied by using various characterization and theoretical calculation system. The structure-effect relationship between lattice distortion and activation of C-H bond and C-O bond of glycerol is probed through dynamic experiments.

Lattice distorted RuCo/AC catalyst for transfer hydrogenolysis of glycerol to 1,2- propanediol

ACS Spring Meeting 2021

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