Abstract
In this paper, the syntheses of a set of cerium-bismuth mixed oxides with the formula Ce1−xBixO2−x/2, where the range of x is 0.0 to 1.0 in 10 mol% steps, via co-precipitation methods is described. Two synthesis routes are tested: The “normal” and the so called “reverse strike” (RS) co-precipitation route. The syntheses are performed with an automated synthesis robot. The activity for Diesel soot oxidation is measured by temperature programmed oxidation with an automated, serial thermogravimetric and differential scanning calorimetry system (TGA/DSC). P90 is used as a model soot. An automated and reproducible tight contact between soot and catalyst is used. The synthesized catalysts are characterized in terms of the specific surface area according to Brunauer, Emmett and Teller (SBET), as well as the dynamic oxygen storage capacity (OSCdyn). The crystalline phases of the catalysts are analysed by powder X-ray diffraction (PXRD) and Raman spectroscopy. The elemental mass fraction of the synthesized catalysts is verified by X-ray fluorescence (XRF) analysis. A correlation between the T50 values, OSCdyn and SBET has been discovered. The best catalytic performance is exhibited by the catalyst with the formula RS-Ce0.8Bi0.2Ox which is synthesized by the reverse strike co-precipitation route. Here, a correlation between activity, OSCdyn, and SBET can be confirmed based on structural properties.
Highlights
Diesel soot has proven to be carcinogenic [1] and it can influence the environment, the vegetation, or the climate [2]
From a visual inspection of the precipitation process, we find the beginning of precipitation for bismuth oxide at Ph < 1 and for cerium oxide near to pH = 4
The synthesized oxides are characterized by normal synthesis and the reverse strike synthesis
Summary
Diesel soot has proven to be carcinogenic [1] and it can influence the environment, the vegetation, or the climate [2]. Diesel soot may cause lung or cardiovascular diseases [3,4]. Different technologies to control the emission of Diesel soot have been developed. Modern Diesel vehicles possess a Diesel particulate filter (DPF) system to filtrate Diesel soot from the exhaust stream. Diesel soot accumulates on the surface or in the channels of the DPF.
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.
