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Activated Carbon Coated Polymeric Foam for Hydrocarbon Vapor Adsorption
ISSN: 0148-7191, e-ISSN: 2688-3627
Published April 11, 2005 by SAE International in United States
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The Environmental Protection Agency (EPA) has enacted increasingly stringent limits on hydrocarbon emissions for vehicles used in the United States. The Partial Zero Emissions Vehicle (PZEV) requires a lower level of emissions than previously accepted. OEMs, Tier 1, and various suppliers have been working to cost effectively meet this challenge.
Activated Carbon (AC) in the form of pellets, granules, or as part of an extruded ceramic has been used in emission control systems. Wood based activated carbon, treated with phosphoric acid, seems to offer the optimal pore structure, adsorption, and desorption characteristics required.
This paper discusses materials used to meet the challenges of the PZEV requirement, highlights the differences between two types of hydrocarbon adsorbing materials, and offers a modified test method useful for evaluating filter medium performance at the lower hydrocarbon concentrations associated with PZEV emission levels.
CitationLebowitz, J., Lovette, J., Chan, C., and Frich, D., "Activated Carbon Coated Polymeric Foam for Hydrocarbon Vapor Adsorption," SAE Technical Paper 2005-01-1103, 2005, https://doi.org/10.4271/2005-01-1103.
- US EPA Ruling RIN 2060-AC64, “Control of Air Pollution From New Motor Vehicles and New Motor Vehicle Engines: Evaporative Emission Regulations for Gasoline- and Methanol-Fueled Light-Duty Vehicles, Light-Duty Trucks and Heavy-Duty Vehicles,” 40 CFR Parts 80 and 86.
- Bugli, Neville, “Air Induction Filter Assembly” US Patent 6,464,761, Oct 15, 2002
- Walters, Leslie, “Evaporative Emission Control Device”, US Patent 4,280,466, July 28, 1981.
- Hiltzik, Laurence et al., “Method for Reducing Emissions from Evaporative Emissions Control Systems”, US Patent 6,540,815, April 1, 2003
- Park, Minwoo et al., “Adsorptive Monolith Including Activated Carbon and Method for Making Said Monolith”, US Patent 5,914,294, June 22, 1999