HYARC
Hydrogen Properties
Discover the Remarkable Properties of Hydrogen

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Comparative Properties of Hydrogen and Other Fuels
PropertyUnitsHydrogenMethanePropaneMethanolEthanolGasolineChemical Formula H2CH4C3H8CH3OHC2H5OHCxHy (x = 4 - 12)Molecular Weight [a, b] 2.0216.0444.132.0446.07100 - 105Density, NTP [3, a, c]kg/m³0.08380.6681.87791789751 lb/ft³0.…
Hydrogen Fuel Quality Standards
Presents hydrogen fuel specifications currently prescribed by the State of California.Updated July, 2019.
Hydrogen Pipelines
Contains information on the lengths of hydrogen pipeline in the U.S., Europe, and the rest of the world by location and ownership.
Top U.S. Refinery Captive, On-Purpose, Hydrogen Producers
Ranks major refinery producers of hydrogen, based on their January 1, 2024 production capacity, per data taken from the Energy Information Administration's June 14, 2024 Refinery Capacity Report.
U.S. Stationary Fuel Cells
Identifies the locations and characteristics of stationary fuel cell installations 25 kW and larger currently known to be operating within the U.S. and planned fuel cell installations that have been publicly announced.  Updates to this…

This material was prepared as an account of work sponsored by an agency of the United States Government.
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The portal brings together and enhances the utility of a variety of tools and web-based content on the safety aspects of hydrogen and fuel cell technologies to help inform those tasked with designing, approving or using systems and facilities, as well as those responding to incidents.

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