Abstract
Zirconia-supported gold-promoted cobalt catalysts were synthesized and tested for the complete oxidation of propane and naphthalene. The catalysts were characterized by BET surface area, scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), powder X-ray diffraction (XRD), transmission electron microscopy (TEM), temperature-programmed reduction (TPR), and X-ray photoelectron spectroscopy (XPS). In both propane and naphthalene combustion reactions, the results obtained indicate that catalysts formulated with Co3O4 are more active than those containing only Au. Catalysts prepared using the deposit/precipitation (DP) method have better activity than those in which the traditional technique is used. Gold addition using the DP methods generates a promoting effect on the activity of cobalt-containing catalysts. The AuDpCoZt catalyst was found to be the most active for both propane and naphthalene combustion. The catalytic behavior of this sample is associated with a synergic effect between gold, cobalt, and the support, which is also evidenced by an increase in the reducibility of this catalytic system. The effect of the presence of NO in the feed was also analyzed for propane combustion.
Highlights
Pollutants known as volatile organic compounds (VOCs) are emitted into the atmosphere from different sources
Catalysts containing gold and cobalt present specific surface areas similar to those observed in supported cobalt catalysts. These results suggest that gold addition has not modified the catalyst textural properties
The preparation method of monometallic gold catalysts directly influences the activity of these solids, both for propane and naphthalene reactions
Summary
Pollutants known as volatile organic compounds (VOCs) are emitted into the atmosphere from different sources. VOCs act as greenhouse gases, causing serious damage to the environment and adverse health effects. A methodology used to reduce emissions from mobile sources is proposed by introducing catalytic converters to vehicle exhausts, where the oxidation of these gases to CO2 and H2 O occurs at a low temperature. Catalytic oxidation is considered an efficient way to treat. VOC emissions [1,2,3,4]. Systems based on supported noble metals (Pt, Pd, Au) are recognized among the most active catalysts for this process. The most widely studied catalysts are based on Pt and Pd
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
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.
