(173e) Functionalized TiO2 Nanotubes for Selective Dehydration and Hydrogenation of Polyols
AIChE Annual Meeting
Wednesday, November 16, 2022 - 3:30pm to 5:00pm
The conversion for 2,5-hexanediol was carried out in three different solvents as a function of temperature reactant concentration. The products and their concentrations for the 2,5-hexanediol conversion were determined by GC-MS and GC-FID, respectively. In comparison, the conversion of ethylene vinyl alcohol was conducted in pure melts as well as in the presence of solvents described above at varying catalyst ratios, temperatures, and polymer pellet sizes. The products of reactions in the crucible and lab-scale extruder were monitored by TGA, MS, FTIR, SEM, and EDX. The use of Î³-valerolactone at 150 Â°C was shown to be sufficient to promote selective conversion while minimizing reactions of the solvent itself. For the pure EVOH, we utilized these results to identify conditions that maximize EVOH decomposition rate without substantial formation of new C-C bonds. We summarize the intrinsic rate constants in both the model compound blends and real polymers, which are used to identify conditions (temperature and hydrogen pressure) necessary for the selective conversion of polyols to deoxygenated products in multicomponent blends.