Atmospheric hydrodeoxygenation of phenol as pyrolytic‐oil model compound for hydrocarbon production using Ag/TiO 2 catalyst

Ng, Andrew Kay Lup and Abnisa, Faisal and Daud, Wan Mohd Ashri Wan and Aroua, Mohamed Kheireddine (2019) Atmospheric hydrodeoxygenation of phenol as pyrolytic‐oil model compound for hydrocarbon production using Ag/TiO 2 catalyst. Asia-Pacific Journal of Chemical Engineering, 14 (2). e2293. ISSN 1932-2135, DOI https://doi.org/10.1002/apj.2293.

Full text not available from this repository.

Abstract

Hydrodeoxygenation (HDO) kinetics of phenol over Ag/TiO 2 catalyst was investigated at 415–600 K and 1 atm. The use of oxophilic TiO 2 support has improved phenol conversion due to its preferential activation of CO bond. Product analysis confirmed the occurrence of direct deoxygenation (DDO) and hydrogenation–dehydration (HYD) pathways to produce benzene and cyclohexane, respectively. Both phenol hydrogenolysis and hydrogenation steps are the respective rate-limiting steps for DDO and HYD pathways of phenol HDO over Ag/TiO 2 . Based on the transition state theory, negative entropy changes of activation during HDO indicated that the HDO reactants formed activated complexes that had more orderly bonding configurations prior to the hydrogenolysis, hydrogenation, and dehydration steps. Under the present conditions, the catalyst was stable after 4 hr of HDO runs and able to be regenerated via H 2 -activation and calcination in air at 553 K with at least 98.9% removal efficiency to remove coke deposits and reform Ag metal species after HDO. © 2019 Curtin University and John Wiley & Sons, Ltd.

Item Type:	Article
Funders:	GSP‐MOHE, University of Malaya: fully funding this study through the project number MO008‐2015
Uncontrolled Keywords:	Gas-phase hydrodeoxygenation; Kinetic modeling; Phenol; Silver catalyst; Titania support
Subjects:	T Technology > TP Chemical technology
Divisions:	Faculty of Engineering
Depositing User:	Ms. Juhaida Abd Rahim
Date Deposited:	18 Apr 2020 13:32
Last Modified:	18 Apr 2020 13:32
URI:	http://eprints.um.edu.my/id/eprint/24212

Actions (login required)

View Item