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In-line Filter for Particulate Matter at Heavy-Duty Hydrogen Fueling Stations


c.       In-line Filter for Particulate Matter at Heavy-Duty Hydrogen Fueling Stations

This subtopic seeks concepts that can remove particulate contaminants from hydrogen fuel at fueling stations for medium- and heavy-duty vehicles.


Hydrogen fueling stations for fuel cell vehicles conventionally use filters to prevent particulate matter from contaminating the vehicle [1]. Limits for particulate matter in hydrogen fuel for vehicles have been established by the Society of Automotive Engineers (SAE) J2719 and the International Organization for Standardization (ISO) 14687 standards.[2] Per SAE J2719, particulate matter must be limited to 1 mg/kg H2, and 99% of particulates larger than 5 micrometers should be removed before reaching a vehicle.[3] Filters that meet SAE J2719 requirements are available for light duty vehicle fueling stations, where the peak flow rate is less than 2 kg/min. However, filters that can support the need to fill at the higher flow rates (60 kg or more in approximately 6-10 minutes), needed for fueling medium- (MD) and heavy-duty (HD) vehicles, are not commercially available.


Proposed filter concepts must be capable of continuous operation at -40°C and pressures of 700-1,000 bar. The unit design should account for any occurring pressure drop due to the filtration. The unit developed must be capable of installation within a hydrogen dispenser, and potentially, at multiple points in the fueling system (e.g. between compressor stages) to mitigate the consequences of failure. The unit must be capable of an average flow rate of approximately 10 kg H2/min [4].


Phase I proposals should include concept development and feasibility evaluation of filter materials and design for key metrics, including durability under 1,000 bar pressure and -40°C temperature, and ability to meet SAE J2719 particulate requirements. Further, the resistance across the filter should not generate sufficient pressure drop to impact the desired flow rate and dispensing pressures.

Phase II proposals will involve incorporation of the filter design into a device that should additionally be easily field replaceable, and validation of the device. Phase II proposals must identify service life and provide criteria for filter replacement. Concepts proposed should target a capital cost of $500 or less.


Questions – Contact: Neha Rustagi,


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