Comparative Analysis of Emission Characteristics of DPF and CDPF Active Regeneration
Based on the external heating source regeneration bench and particle loading device,the emission char-acteristics of outlet gas and particle during active regeneration of diesel particulate filter(DPF)and catalytic DPF(CDPF)under different regeneration temperature and carbon(Printex-U,PU)loading were studied.The results show that the coating of catalyst(Pt)is conducive to the oxidation of PU.Under the same PU loading,CDPF is more likely to produce temperature peaks,and the regeneration efficiency is slightly higher than DPF.DPF regen-eration process is accompanied by higher volume fraction CO emission,and a lower concentration nuclear mode particles emission window will appear in the heating stage,and there is almost no particle release in the subsequent regeneration stage.There is almost no CO generation in the regeneration process of CDPF,but a large number of small particles below 30 nm will be released in the regeneration stage,and the particle concentration at the outlet of CDPF will gradually increase with the increase of regeneration temperature and PU loading.DPF and CDPF have different optimization windows during regeneration,which is conducive to reducing particulate emissions and maintaining high regeneration efficiency.
万方数据
维普
