Filter-Blocking Tendency of Biodiesel and Biodiesel-Diesel Blends in Compression-Ignition Fuel Systems: Mechanisms, Test Methods and Mitigation

Musthafa B; Manikandan P; Balaji V; Saravanan B

doi:10.34256/famr2612

Musthafa B Department of Automobile Engineering, B.S. Abdur Rahman Crescent Institute of Science and Technology, Chennai, Tamil Nadu, India
Manikandan P School of Mechanical Engineering, Vellore Institute of Technology, Vellore, Tamil Nadu, India
Balaji V Department of Mechanical Engineering, Sri Shakthi Institute of Technology, Coimbatore, Tamil Nadu, India
Saravanan B Department of Mechanical Engineering, Sri Shakthi Institute of Technology, Coimbatore, Tamil Nadu, India

Keywords: Biodiesel, Cold-Flow Operability, Compression-Ignition Engine, Filter Blocking Tendency, Fuel Quality, Oxidation Stability, Saturated Monoglycerides

Abstract

Biodiesel can reduce petroleum dependence and improve the lubricity and renewable content of compression-ignition fuels, but its field reliability is strongly influenced by filterability. Filter blocking is not produced by a single contaminant or temperature threshold. It results from coupled effects of feedstock fatty-acid composition, incomplete transesterification, saturated monoglycerides, sterol glucosides, soaps, residual metals, particulate matter, water, microbial growth, oxidative ageing and low-temperature crystallisation. This review critically synthesises the mechanisms by which these species form, agglomerate and deposit within vehicle and dispenser filters. It distinguishes filter-blocking tendency from cloud point, cold-filter-plugging point, particulate contamination and cold-soak filtration, and explains why no individual laboratory method reproduces every field failure. ASTM D2068 evaluates the filtration behaviour of middle-distillate fuels and biodiesel blends, whereas ASTM D7501 targets cold-soak filter-blocking potential of B100. Their outputs should be interpreted together with oxidation stability, glyceride composition, particulate loading and actual thermal history. Evidence from B20 and higher blends shows that pressure-drop growth depends on feedstock, fuel age, temperature cycling and contaminant interactions rather than biodiesel concentration alone. Mitigation is most effective when implemented as a hierarchy: rigorous conversion and purification, removal of minor precipitating species, oxidation control, dry and clean storage, climate-appropriate blending, validated cold-flow improvers, suitable filter design and condition-based maintenance. A research framework is proposed for deposit-resolved chemical analysis, standardised accelerated ageing, pressure-drop sensing and predictive filter-life modelling. The review concludes that filterability must be treated as a systems property linking fuel chemistry, logistics, climate and engine hardware, rather than as a pass/fail property of freshly produced biodiesel.

Downloads

Download data is not yet available.

References

U.S. Department of Energy. (2025). Biodiesel fuel basics. Alternative Fuels Data Center. https://afdc.energy.gov/fuels/biodiesel-basics

R. McCormick, K. Moriarty, (2023). Biodiesel Handling and Use Guide (No. NREL/TP--4A00-86939; CRD-15-00593). National Renewable Energy Laboratory (NREL), Golden, CO (United States). https://www.osti.gov/biblio/2001221

V. Manieniyan, V. Velumani, R. Senthilkumar, S. Sivaprakasam, Effect of EGR in a Diesel Engine with Multi-Walled Carbon Nanotubes and Vegetable-Oil-Refinery-Waste Biodiesel. Fuel, 288, (2021) 119689. https://doi.org/10.1016/j.fuel.2020.119689

S. Thangamani, S.N. Sundaresan, S. Kannappan, V.T. Barawkar, T. Jeyaseelan, Impact of Biodiesel and Diesel Blends on the Fuel Filter: A Combined Experimental and Simulation Study. Energy, 227, (2021) 120526. https://doi.org/10.1016/j.energy.2021.120526

A.S. Fersner, J.M. Galante-Fox, Biodiesel Feedstock and Contaminant Contributions to Diesel Fuel Filter Blocking. SAE International Journal of Fuels and Lubricants, 7(3), (2014) 783-791. https://doi.org/10.4271/2014-01-2723

F. Marcella, J. Pichler, A. Agocs, B. Dewitz, T. Drexler, A. Orfaniotis, Root Causes for Low-Temperature Filter Blocking at Petrol Stations - A Field Study. Fuel, 366, (2024) 131304. https://doi.org/10.1016/j.fuel.2024.131304

F. Cardeño, M. Lapuerta, L. Rios, J.R. Agudelo, Reconsideration of Regulated Contamination Limits to Improve Filterability of Biodiesel Fuels. Renewable Energy, 159, (2020) 1243-1251. https://doi.org/10.1016/j.renene.2020.06.079

I. Paryanto, I.A. Budianta, K.C.H. Alifia, I.M. Hidayatullah, M.A. Darmawan, T. Judistira, T. Prakoso, A. Indarto, M. Gozan, Modelling of Fuel Filter Clogging of B20 Fuel Based on the Precipitate Measurement and Filter Blocking Test. ChemEngineering, 6(6), (2022) 84. https://doi.org/10.3390/chemengineering6060084

Haryono, et al., The effect of contaminants and temperatures of a high-biodiesel fuel blend on filter blocking tendency. Energies, 18, (2025) 219.

S. Thangamani, S.N. Sundaresan, S. Kannappan, V.T. Barawkar, T. Jeyaseelan, Impact of biodiesel and diesel blends on the fuel filter, Energy 227 (2021) 120526.

Y.S. Pradana, I.G.B. Makertihartha, A. Indarto, T. Prakoso, T.H. Soerawidjaja, A Review of Biodiesel Cold Flow Properties and its Improvement Methods: Towards Sustainable Biodiesel Application. Energies, 17(18), (2024) 4543. https://doi.org/10.3390/en17184543

E. David, J. Kopac, Survey on Antioxidants used as Additives to Improve Biodiesel Oxidation Stability, Molecules, 28(23), (2023) 7765. https://doi.org/10.3390/molecules28237765

ASTM International. (2014). Standard Test Method for Determination of Total Monoglycerides, Total Diglycerides, Total Triglycerides, and Free and Total Glycerin in B-100 Biodiesel Methyl Esters by Gas Chromatography.

J. Barker, J. Reid, E. Wilmot, A. Carter, J. Langley, J. Herniman, (2023) A Study of Biodiesel and Biodiesel Petroleum Diesel Blends to Mitigate Filter Blocking. In 2023 JSAE/SAE Powertrains, Energy and Lubricants International Meeting, 354456. https://doi.org/10.4271/2023-32-0131

C.B. Sia, J. Kansedo, Y.H. Tan, K.T. Lee, Evaluation on Biodiesel Cold Flow Properties, Oxidative Stability and Enhancement Strategies: A Review. Biocatalysis and Agricultural Biotechnology, 24, (2020) 101514. https://doi.org/10.1016/j.bcab.2020.101514

J. Barba, M. Lapuerta, F. Cardeño, J. Hernández, Are Cold Filter Plugging Point and Cloud Point Reliable Enough to Prevent Cold-Start Operability Problems in Vehicles using Biodiesel Blends?. Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering, 234(9), (2020) 2305-2311. https://doi.org/10.1177/0954407020915101

ASTM International. (2022). Standard Test Method for Determination of Fuel Filter Blocking Potential of Biodiesel Fuel Blendstock (B100) by Cold Soak Filtration Test (ASTM D7501-22). West Conshohocken, PA. https://doi.org/10.1520/D7501-22

ASTM International. (2024). Standard Test Method for Determination of Filter Blocking Tendency (ASTM D2068-24a). https://www.astm.org/d2068-24a.html

ASTM International. (2021). Standard Test Method for Determining Enhanced Filter Blocking Tendency of Middle Distillate Fuel Oils (ASTM D8386-21). https://www.astm.org/d8386-21.html

L.N. Komariah, F. Hadiah, F. Aprianjaya, F. Nevriadi, Biodiesel Effects on Fuel Filter: Assessment of Clogging Characteristics. Journal of Physics: Conference Series, 1095, (2018) 012017. https://doi.org/10.1088/1742-6596/1095/1/012017

B. Saravanan, B. Musthafa, M.A. Asokan, A Combined Study of Filterability and Soaking Strength of Fuel Filter and Effect of Injection Timing on CI Engine Characteristics using Ceiba Pentandra Biodiesel. Biofuels, 14(7), (2023) 703-711. https://doi.org/10.1080/17597269.2023.2167270

I. Paryanto, et al., Modelling of fuel filter clogging of B20 fuel based on the precipitate measurement and filter blocking test, ChemEngineering 6 (2022) 84. https://doi.org/10.3390/chemengineering6060084

K. Gopalan, S. Raikova, C.R. Smith, C.D. Bannister, M. Savvoulidi, S. Chrysafi, N. Johnston, C.J. Chuck, The Impact of Biodiesel and Alternative Diesel Fuel Components on Filter Blocking Through Accelerated Testing on a Novel High-Pressure Common-Rail Non-Firing Rig. Fuel, 282, (2020) 118850. https://doi.org/10.1016/j.fuel.2020.118850

I.S.S. Nawaz, B. Musthafa, S.A. Srinivasan, M.A. Asokan, Influence of Nano Fuel Additives on Filter Blocking Characteristics of Biodiesel-Bioethanol-Diesel Blends, Solid Fuel Chemistry, 58, (2024) 280-284. https://doi.org/10.3103/S0361521924700162

B. Musthafa, M.A. Asokan, A Comparative Study of Fuel Filterability, Performance and Emission Characteristics in a CI Engine Fuelled with a Dual-Biodiesel Mixture Blended with Conventional Diesel. Solid Fuel Chemistry, 57, (2023) S42-S52. https://doi.org/10.3103/S0361521923070066