(779d) Catalyst Design and Optimization for Selective Hydrodeoxygenation

Upgrading pyrolysis oil by using hydrodeoxygenation(HDO) process is intensively studied recently. However, as an expensive resource, the large consumption of hydrogen is not desired. Therefore, HDO with selectivity is the target for such type of reaction. Varies catalysts and processes were developed. However, most of these studies either dealt with one certain type of model compounds with some catalyst, or one type of catalyst with some model compounds, which could not provide a systematic comparison between catalysts. In this study, the four most commonly used noble metals (Ru, Rh, Pt, Pd) plus nickel and three types of support materials (acid/netural/alkaline) were tested with three model compounds which has oxygen in different structure. The hydrogenation (HYD) and selective HDO were two competitive reaction in the system so that temperature was critical to the selectivity. The analysis of variance (ANOVA) was used to study the interaction between experiment factors. The optimal reaction condition and proper catalyst was obtained through the data analysis. The reaction mechanism of the deoxygenation with different model compounds was proposed and how the compound structure would affect the kinetics of HYD/HDO reaction was also evaluated.