Simultaneous catalytic oxidation of carbon monoxide, hydrocarbons and soot with Ce–Zr–Nd mixed oxides in simulated diesel exhaust conditions

Abstract

Simultaneous catalytic oxidation of carbon monoxide, hydrocarbons and soot with Ce-Zr-Nd mixed oxides in simulated Diesel exhaust conditions, Applied Catalysis B, Environmental (2014), http://dx.doi.org/10. 1016/j.apcatb.2014.07.013 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. Diesel vehicles running with sulfur-free fuel, since it maintained significant 91 activity for soot combustion even in the presence of H 2 O and CO 2 . 92As far as we know, the simultaneous ceria-catalyzed combustion of soot, 93CO, and hydrocarbons has not been studied and reported in the literature, and 94 this is one of the goals of the current study. In addition, the positive effect of recorded between 10 and 80º (2θ) with a step of 0.025º. 124Raman spectra were recorded in a Bruker RFS 100/S Fourier Transform 125Raman Spectrometer with a variable power Nd-YAg laser source (1064 nm). 126The laser beam was focused on the sample in a 180º backscattering 127 configuration and 128 scans at 100 mW laser power were recorded. The BET specific surface area of the oxides was determined by physical respectively, of each gas pollutant (CO, propylene and benzene). 173Soot conversion was determined from CO 2 and CO evolved (both 174 followed by gas chromatography) after subtracting the stoichiometric amounts precursor, but this would be hindered Nd 3+ doping. 244Raman spectra included in Figure 3 also provided information about the 245 structure of the oxides, and supported some conclusions of the XRD analysis. 261The BET specific surface areas also showed important differences

Enhanced Catalytic Performance of Manganese and Cobalt Co–doped CeO2 Catalysts for Diesel Soot Oxidation

“…In this work, we have successfully prepared codoped ceria catalysts and tested towards soot oxidation under tight contact conditions. The observed results are consistent with the results obtained by many researchers …”

Structure, synthesis, and catalytic properties of nanosize cerium-zirconium-based solid solutions in environmental catalysis

“…Therefore, better thermal stability and higher OSC are urgent for the development of new-generation TWCs. A great amount of research has demonstrated that the doping rare earth metal can improve the three-way catalytic activity and temperature operation window, as shown in Table 9 [484][485][486][487][488][489][490][491][492][493][494][495][496][497][498].…”

Simultaneous NOx and Particulate Matter Removal from Diesel Exhaust by Hierarchical Fe-Doped Ce–Zr Oxide

“…Compared with ceria, mixed Ce–Zr oxides display better thermal stability and oxygen storage capacity, which is beneficial for PM combustion. 52 In general, it is a challenge to reduce NO x under the oxygen-rich conditions required to oxidize PM into CO 2 . 53 As NO 2 is more effective in soot oxidation than O 2 , soot is usually first oxidized in the NO x /O 2 exhaust gas, followed by ammonia-assisted NO x reduction using, for instance, Cu/zeolites placed downstream of the PM combustion zone.…”