Benchtop Investigation of Filtration Efficiency and Pressure Drop Behavior of Commercial High Porosity Gasoline Particulate Filters
Published January 15, 2019 by SAE International in United States
Downloadable datasets for this paper availableAnnotation of this paper is available
The increasing number of gasoline direct injection (GDI) vehicles on the roads has drawn attention to their particulate matter (PM) emissions, which are greater both in number and mass than port fuel injected (PFI) spark ignition (SI) engines . Regulations have been proposed and implemented to reduce exposure to PM, which has been shown to have negative impacts on both human health and the environment [2, 3]. Currently, the gasoline particulate filter (GPF) is the proposed method of reducing the amount of PM from vehicle exhaust, but modifications to improve the filtration efficiency (FE) and reduce the pressure drop across the filter are yet needed for implementation of this solution in on-road vehicles. This work evaluates the impacts of wall thickness and cell density on filtration efficiency and backpressure using a benchtop filtration system. For both unmodified and modified GPFs, the filtration efficiency was studied using a scanning mobility particle sizer (SMPS), and the pressure drop across the filter was obtained using a differential pressure transducer. The performance of the unmodified GPFs were investigated at three space velocities: 15,000 hr-1, 30,000 hr-1, and 60,000 hr-1. Increasing space velocity through unmodified GPFs results in decreasing FE by approximately 5% for every 15,000 hr-1 increase, which means a GPF has its lowest FE and highest pressure drop at 60,000 hr-1. The GPF with lowest initial FE and pressure drop, 300-10, was modified by preloading calcium sulfate (CaSO4) to form a cake layer on the walls. The improvement of about 10% to the filtration efficiency and increase of about 6% to the pressure drop when loaded to 20 g/L indicates that a preloaded cake layer can improve performance with less penalty than increasing wall thickness.
CitationPorter, Q. and Strzelec, A., "Benchtop Investigation of Filtration Efficiency and Pressure Drop Behavior of Commercial High Porosity Gasoline Particulate Filters," SAE Technical Paper 2019-01-0054, 2019, https://doi.org/10.4271/2019-01-0054.
Data Sets - Support Documents
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- Saliba, G. et al., “Comparison of Gasoline Direct-Injection (GDI) and Port Fuel Injection (PFI) Vehicle Emissions: Emission Certification Standards, Cold-Start, Secondary Organic Aerosol Formation Potential, and Potential Climate Impacts,” Environmental Science & Technology 51(11):6542-6552, 2017.
- Hoek, G. et al., “Long-Term Air Pollution Exposure and Cardio- Respiratory Mortality: A Review. Environmental Health,” A Global Access Science Source 12(1):1-15, 2013.
- Anderson, J.O., Thundiyil, J.G., and Stolbach, A., “Clearing the Air: A Review of the Effects of Particulate Matter Air Pollution on Human Health,” Journal of Medical Toxicology: Offficial Journal of the American College of Medical Toxicology 8(2):166-175, 2012.
- EPA, “Summary of the Clean Air Act,” 2017, EPA.gov.
- Baker, J.A., “Particulate Matter Regulation and Implications for the Diesel Engine,” SAE Technical Paper 981174, 1998, doi:10.4271/981174.
- Harrison, R.M. and Yin, J., “Particulate Matter in the Atmosphere: Which Particle Properties Are Important for Its Effects on Health?” Science of the Total Environment 249(1):85-101, 2000.
- EPA, “Health and Environmental Effects of Particulate Matter in EPA.gov,” 2016.
- Weinmayr, G. et al., “Long-Term Exposure to Fine Particulate Matter and Incidence of Type 2 Diabetes Mellitus in a Cohort Study: Effects of Total and Traffic-Specific Air Pollution,” Environ Health 14:53, 2015.
- Gladstein, N.A., “Ultrafine Particulate Matter and the Benefits of Reducing Particle Numbers in the United States,” 2013.
- “Health and Environmental Effects of Particulate Matter in EPA.gov,” 2016.
- Jacobson, M.Z., “Control of Fossil-Fuel Particulate Black Carbon and Organic Matter, Possibly the Most Effective Method of Slowing Global Warming,” Journal of Geophysical Research 107(D19), 2002.
- Piock, W., Hoffmann, G., Berndorfer, A., Salemi, P. et al., “Strategies Towards Meeting Future Particulate Matter Emission Requirements in Homogeneous Gasoline Direct Injection Engines,” SAE Int. J. Engines 4(1):1455-1468, 2011, doi:10.4271/2011-01-1212.
- Mamakos, A. et al., “Assessment of Different Technical Options in Reducing Particle Emissions from Gasoline Direct Injection Vehicles,” Journal of Aerosol Science 63:115-125, 2013.
- Brezny, R., “Particulate Control Experience with GDI and GPFs,” Manufacturers of Emission Controls Association, 2016.
- Barnes, C., “Effect of Ethanol on the Oxidative Reactivity of Gasoline Direct Injection Particulate,” Mechanical Engineering, 2017.
- Zhang, M. et al., “Influence of Diluents on Combustion and Emission Characteristics of a GDI Engine,” Applied Thermal Engineering 124:746-755, 2017.
- Craig, A., Warkins, J., Aravelli, K., Moser, D. et al., “Low Cost LEV-III, Tier-III Emission Solutions with Particulate Control Using Advanced Catalysts and Substrates,” SAE Int. J. Engines 9(2):1276-1288, 2016, doi:10.4271/2016-01-0925.
- Chen, L. et al., “Characterizing Particulate Matter Emissions from GDI and PFI Vehicles under Transient and Cold Start Conditions,” Fuel 189:131-140, 2017.
- Zhu, R. et al., “Tailpipe Emissions from Gasoline Direct Injection (GDI) and Port Fuel Injection (PFI) Vehicles at Both Low and High Ambient Temperatures,” Environmental Pollution 216(Supplement C):223-234, 2016.
- Guan, B. et al., “Review of the State-of-the-Art of Exhaust Particulate Filter Technology in Internal Combustion Engines,” J Environ Manage 154:225-258, 2015.
- Merkel, G., Beall, D., Hickman, D., and Vernacotola, M., “Effects of Microstructure and Cell Geometry on Performance of Cordierite Diesel Particulate Filters,” SAE Technical Paper 2001-01-0193, 2001, doi:10.4271/2001-01-0193.
- Ogyu, K., Oya, T., Kasuga, T., and Ohno, K., “Study on Filter Substrate Structure for Lower Backpressure and Higher Regeneration Performance,” SAE Technical Paper 2006-01-1526, 2006, doi:10.4271/2006-01-1526.
- Mokhri, M.A. et al., “Soot Filtration Recent Simulation Analysis in Diesel Particulate Filter (DPF),” Procedia Engineering 41:1750-1755, 2012.
- Petasch, J.A.U., “Effect of Membranes in Exhaust Particulate Filtration,” in 40th International Conference & Expo on Advanced Ceramics & Composites (ICACC 2016), 2013.
- Konstandopoulos, A.G. and Johnson, J.H., “Wall-Flow Diesel Particulate Filters-Their Pressure Drop and Collection Efficiency,” SAE Technical Paper 890405, 1989, doi:10.4271/890405.
- Ohara, E., Mizuno, Y., Miyairi, Y., Mizutani, T. et al., “Filtration Behavior of Diesel Particulate Filters (1),” SAE Technical Paper 2007-01-0921, 2007, doi:10.4271/2007-01-0921.
- White, J., “Size-Dependent Filtration of Non-LOADED Particulate Traps,” Mechanical Engineering, 2014.
- Sheppard, J., Yang, and Strzelec, A., “Modeling and Experimentation of GDI-Sized Particulate Filtration and Pressure-Drop Behavior in Uncoated Commercial DPF Substrates,” SAE Technical Paper 2019-01-0052, 2019, doi:10.4271/2019-01-0052.
- Parks, J., Storey, J., Prikhodko, V., and Debusk, M., “Filter-Based Control of Particulate Matter from a Lean Gasoline Direct Injection Engine,” SAE Technical Paper 2016-01-0937, 2016, doi:10.4271/2016-01-0937.
- Maricq, M.M., Szente, J.J., and Jahr, K., “The Impact of Ethanol Fuel Blends on PM Emissions from a Light-Duty GDI Vehicle,” Aerosol Science and Technology 46(5):576-583, 2012.
- Dalla Nora, M., Lanzanova, T.D.M., and Zhao, H., “Effects of Valve Timing, Valve Lift and Exhaust Backpressure on Performance and Gas Exchanging of a Two-Stroke GDI Engine with Overhead Valves,” Energy Conversion and Management 123:71-83, 2016.
- Watling, T., Ravenscroft, M., Cleeton, J., Rees, I. et al., “Development of a Particulate Filter Model for the Prediction of Backpressure: Improved Momentum Balance and Entrance and Exit Effect Equations,” SAE Int. J. Engines 10(4):1765-1794, 2017, doi:10.4271/2017-01-0974.
- Hashimoto, S., Miyairi, Y., Hamanaka, T., Matsubara, R. et al., “SiC and Cordierite Diesel Particulate Filters Designed for Low Pressure Drop and Catalyzed, Uncatalyzed Systems,” SAE Technical Paper 2002-01-0322, 2002, doi:10.4271/2002-01-0322.
- Song, J., Alam, M., Zello, V., Boehman, A.L. et al., “Fuel Sulfur Effect on Membrane Coated Diesel Particulate Filter,” SAE Technical Paper 2002-01-2788, 2002, doi:10.4271/2002-01-2788.
- Mizuno, Y., Miyairi, Y., Katsube, F., Ohara, E. et al., “Study on Wall Pore Structure for Next Generation Diesel Particulate Filter,” SAE Technical Paper 2008-01-0618, 2008, doi:10.4271/2008-01-0618.
- Ogyu, K., Kudo, A., Oshimi, Y., Sato, H. et al., “Characterization of Thin Wall SiC-DPF,” SAE Technical Paper 2003-01-0377, 2003, doi:10.4271/2003-01-0377.
- Custer, N., Kamp, C., Sappok, A., Pakko, J. et al., “Lubricant-Derived Ash Impact on Gasoline Particulate Filter Performance,” SAE Int. J. Engines 9(3):1604-1614, 2016, doi:10.4271/2016-01-0942.
- Wang, Y. and Kamp, C., “The Effects of Mid-Channel Ash Plug on DPF Pressure Drop,” SAE Technical Paper 2016-01-0966, 2016, doi:10.4271/2016-01-0966.
- Sappok, A. and Wong, V., “Ash Effects on Diesel Particulate Filter Pressure Drop Sensitivity to Soot and Implications for Regeneration Frequency and DPF Control,” SAE Int. J. Fuels Lubr. 3(1):380-396, 2010, doi:10.4271/2010-01-0811.
- Lambert, C., Chanko, T., Jagner, M., Hangas, J. et al., “Analysis of Ash in Low Mileage, Rapid Aged, and High Mileage Gasoline Exhaust Particle Filters,” SAE Int. J. Engines 10(4):1595-1603, 2017, doi:10.4271/2017-01-0930.
- Panu Karjalainen, L.P., Heikkila, J., Lahde, T., Tzamkiozis, T. et al., “Exhaust Particles of Modern Gasoline Vehicles: A Laboratory and an On-Road Study,” Atmospheric Environment 97:262-270, 2014.
- Viswanathan, S. et al., “Experimental Investigation of the Effect of Inlet Particle Properties on the Capture Efficiency in an Exhaust Particulate Filter,” Journal of Aerosol Science 113:250-264, 2017.