Hydrodeoxygenation of <i>m</i>-Cresol over WO<sub><i>x</i></sub>-Pt/SBA-15 Using Alkanes as Hydrogen Carriers
Ching‐Yu Wang, Junsung Ra, Kai Shen, John M. Vohs, Raymond J. Gorte
Abstract
Hydrodeoxygenation (HDO) of m -cresol was studied over WO x -Pt/SBA-15 by using several light alkanes as H 2 carriers. While dehydrogenation of n -hexane at 773 K over a Pt/SBA-15 with 9 nm pores was unstable at pressures below 30 bar, the reaction was stable for more than 5 h at pressures greater than 40 bar. The transition from stable to unstable operation depended on the support pore size and structure, occurring at lower pressures on Pt/SBA-15 with 6 nm pores and much higher pressures on conventional Pt/SiO 2 . WO x -decorated Pt/SBA-15 was active for both dehydrogenation of n -hexane and HDO of m -cresol, and both reactions could be carried out in a stable manner at high pressures. HDO of m -cresol could also be carried out using H 2 from n -pentane and 3-methylpentane over WO x -Pt/SBA-15 at high pressures. Possible explanations for the high-pressure stability are given.