Abstract
The current catalysts for polychlorinated aromatics (PCAs) oxidation showed either poor low-temperature catalytic activity, low mineralization ability or bad stability, and developing oxygen vacancies enriched catalysts with abundant acid sites is a potential solution for the above drawbacks. Herein, oxygen vacancies enriched Nb-WOX were developed for o-DCB (o-dichlorobenzene, a PCAs model compound) oxidation, and they showed notably better low-temperature catalytic activity with T50% <350 °C than did commercial WO3 (T50% >400 °C) under the WHSV of 36000 mL g−1h−1. Nb-WOX supported Ru exhibited even lower T50% (173 °C) and T90% (238 °C), as well as high COX yield with >99% ratio of CO2 to CO and good stability (>99% conversion for 500 mins) when with 1.5 wt% Ru loading at 300 °C. The above phenomenon was attributed to the abundant oxygen vacancies and acid sites in Nb-WOX that contributed to the better redox property, stronger interaction with Ru species and the removal of accumulated chloride. The o-DCB oxidation mechanism revealed that the higher CO2 ratio to CO on Ru/Nb-WOX arose from the deep oxidation of CO byproducts. The work described here will instruct us to degrade PCAs effectively through catalysts design.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
