Experimental evaluation of DPF performance loaded over Pt and sulfur-resisting material for marine diesel engines

Different from vehicle engines, Diesel Particulate Filter (DPF) inactivation is an unavoidable issue for low-speed marine diesel engines fueled with Heavy Fuel Oil (HFO). This paper introduced a sulfur resisting material in Silicon Carbide (SiC)-DPF to improve DPF performance. The results of bench-scale experiments showed that the Balance Point Temperature of the modified DPF module was 300 degrees C and DPF modules had a good filtration performance, with Particulate Matters (PMs) residual being less than 0.6 g per cycle. In pilot-scale tests, PMs emissions of unit power decreased with engine load going up, filtration efficiency of nucleation mode PMs being only 36% under 100% load, while DPF still had a good performance in accumulation mode PMs control, being 94.2% under the same load. DPF modules showed excellent regeneration durability in the 205h endurance test, with a regeneration period of 1.5-2h under 380 degrees C. There was no obvious degeneration in the DPF module structure, with no cracks or breakage. Besides, the DPF module could also control gaseous emissions, total emissions decreased by 10.53% for NO and 57.19% for CO, respectively. The results suggested that introducing sulfur-resisting material in DPF could greatly improve the DPF performance of low-speed marine diesel engines fueled with HFO.

Automated summary

This study introduced a sulfur resisting material in Silicon Carbide (SiC)-DPF to improve the performance of Diesel Particulate Filter (DPF) in low-speed marine diesel engines fueled with Heavy Fuel Oil (HFO). Both bench-scale experiments and pilot-scale tests demonstrated the effectiveness of the modified DPF module in filtration performance and regeneration durability. Introducing sulfur-resisting material greatly improved the DPF performance of low-speed marine diesel engines fueled with HFO.