In situ ATR-IR studies in aqueous phase reforming of Hydroxyacetone (cas 116-09-6) on Pt/ZrO2 and Pt/AlO(OH) catalysts: The role of aldol condensation

Add time:08/28/2019    Source:sciencedirect.com

In situ Attenuated Total Reflection Infrared (ATR-IR) spectroscopy was used to study Aqueous Phase Reforming of Hydroxyacetone (cas 116-09-6) on Pt/AlO(OH) and Pt/ZrO2 catalysts at 230 °C/ 30 bar. Formation of strongly adsorbed aldol condensation products was observed on the surface of Pt/ZrO2 and ZrO2 in contrast to Pt/AlO(OH) and AlO(OH). Peak assignments were supported by DFT calculations of the IR spectra of the condensation products in vacuum and in the presence of water. Aldol condensation of hydroxyacetone leading to compounds with high molecular weight with unsaturated bonds was suggested as a first step in coke formation. Carbonaceous deposits on the surface of the ZrO2 support are oxygen-rich and highly reactive, according elemental analysis and TPO. Surprisingly, no adsorbed CO on Pt was observed in the spectra obtained under reaction conditions, suggesting that adsorbed CO is not involved in the rate-determining step in APR of hydroxyacetone.

We also recommend Trading Suppliers and Manufacturers of Hydroxyacetone (cas 116-09-6). Pls Click Website Link as below: cas 116-09-6 suppliers

Prev:Liquid-liquid equilibria and COSMO-SAC modeling of organic solvent/ionic liquid - Hydroxyacetone (cas 116-09-6) - water mixtures
Next:Hydrogen production via catalytic reforming of the bio-oil model compounds: Acetic acid, phenol and Hydroxyacetone (cas 116-09-6))