Decomposition of glucose with in situ deoxygenation in a low H2 pressure environment – Part I: Monometallic catalysts.

Graphical abstract Highlights • Decomposition of glucose with various monometallic catalysts to perform in situ deoxygenation under low H 2 pressure. • Dispersed and small catalyst sites (0.5%Ni/SiO 2) promoted glucose decomposition. • Large metal sites (4%Co/SiO 2) demonstrated the best in situ selective deoxygenation. • Additional H 2 was produced in situ and utilized by catalysts. Abstract Glucose was decomposed at 350 °C within a dilute H 2 environment in the presence of monometallic, deoxygenation catalysts to promote in situ deoxygenation. The catalysts, which were supported on SiO 2 , included Ni, Cu, Co, and Fe in concentrations of 0.5 wt% and 4 wt% as well as Re, Pt, and Pd in concentrations of 0.5 wt%. Furanic compounds were used to identify deoxygenation due to their unique structures which allow them to be readily identified and because of their well-established deoxygenation reaction pathways. The 4% Co catalyst was deemed most superior at in situ deoxygenation. Ni catalysts were competitive in deoxygenation and helped reduce solid residue most substantially. 0.5 wt% catalysts reduced solid content the most however higher concentrations were needed for better in situ deoxygenation. [ABSTRACT FROM AUTHOR]