Abstract
It is shown by XRD that mixed oxide phases Cu0.92Co2.08O4 and Cu4MgO5 are formed along with the oxides CuO, Co3O4, MgO, and CaO under certain conditions. The positive catalytic effect of individual oxides (CuO and Co3O4) and mixed oxide systems (CuO-Cu0.92Co2.08O4, CuO-CaO, and Cu-MgO-Cu4MgO5) on the oxidation of diesel soot at 280–580°C is established, and a series of catalytic activities CuO-Cu0.92Co2.08O4 > CuO-MgO-Cu4MgO5 > CuO-CaO = CuO > Co3O4 is revealed. Using TEM, the surface micromorphology of crystallites that form oxide systems is characterized. It is found that a catalytic system’s activity increases as the size and surface smoothness of crystallites diminishes. According to data from X-ray photoelectron spectroscopy, a considerable increase in the concentration of O2 in soot with CuO and Co3O4 additives after its oxidation by oxygen is observed without changing the oxidation state of Cu and Co oxidation. The promoting effect of potassium additives in the form of K2CO3 on the investigated catalytic systems during soot oxidation is revealed.
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.
