Experimental Research On Regeneration Of DPF By Using H₂O₂

Diesel Particulate Filter (DPF) is currently an effective and widely used approach to trap the particulate materials of diesel exhaust emissions. A lot of efforts has been doing to the regeneration of the filter in last years. In this paper, the author introduces another experimental research on DPF regeneration, which has been conducted by spraying H2O2 into the filter. It features that the temperature at which the soot oxidizes properly by the reaction between carbon and highly active radical species generated from H₂O₂ become much lower.The filter constructed with wall-flow webby stainless steel coils by author experiments on 165FA diesel engine and demonstrates better regeneration effect. The results of the experiment made online and offline indicate that the filter can be regenerated at the temperatures above 300℃ in the case of spraying H2O2 into the filter. With the reactive temperature increased, the regeneration effect become better. Increasing mass flow ratf of HiOi improves significantly the DPF regeneration. The main component of the emissions in the case of the conducted experiment was COi, but CO was negligible.A numeric simulation on the flow field of the filter using Computational Fluid Dynamics (CFD) software is adopted. So the influence of the filter's configuration on its whole performance (include flow loss, pressure loss and etc. ) detail and an optimized design of the filter was also proposed.