Catalyst active phases loading into the DPFs Two
Fig. 3. Scheme of the experimental setup used to perform the catalytic tests.Figure optionsDownload full-size imageDownload as PowerPoint slide
In E-64-c typical experiment, a DPF was placed into the reactor and valves 1 and 3 (see Fig. 3) were kept open while valves 2 and 4 remained closed in order to force an air stream to pass through the DPF due to the action of a vacuum pump. Then, the desired amount of soot (Printex U) was fed, as indicated in the Fig. 3, being collected in the DPF. Most experiments were carried out with 50 mg of soot, otherwise indicated. Once soot was loaded into the DPF, valves 1 and 3 were closed, valves 2 and 4 were open in order to allow the reactive gas mixture to flow through the reactor and the temperature was raised at 10 °C/min from room temperature to 800 °C.
The soot conversion profiles were determined from CO and CO2 evolved, and the carbon mass balances were closed with an albinism average experimental error of 10%.
2.4. SEM-chemical mapping characterization