First Responders

Welcome to the First Responders Role Page!

Resources and tools are shown on this page and may be searched using the search box. Also, you may search in a specific resource to only view those results.  To expand a block of resources, click the green header. Once expanded, you can view the resources of your choice by clicking it, or collapse it back by clicking the green header again. You can easily view many resources side-by-side to get a comprehensive overview of hydrogen safety.

 

 

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Apr 24 2015 - 8:57am
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Basic Hydrogen Properties Chart

Download the information in Excel format: Hydrogen Properties

Properties

Values

Units

Autoignition temperatureThe autoignition temperature depends on hydrogen concentration (minimum at stoichiometric combustion conditions), pressure, and even the surface characteristics of the vessel. See NFPA 2: Hydrogen Technologies Code 2016 Edition Annex D.

500

°C

932

°F

Boiling point (1 atm)NIST Chemistry WebBook

-252.9

°C

-423.2

°F

Density (NTP)NTP (normal temperature and pressure) = 20°C (68°F) and 1 atm. NIST Chemistry WebBook

0.08375

kg/m³

0.005229

lb/ft³

Diffusion coefficient in air (NTP)NTP (normal temperature and pressure) = 20°C (68°F) and 1 atm. National Aeronautical and Space Administration, Safety Standard for Hydrogen and Hydrogen Systems (NSS 1740.16), 1997

0.610

cm²/s

6.57 E-4

ft²/s

Enthalpy (NTP)NTP (normal temperature and pressure) = 20°C (68°F) and 1 atm. NIST Chemistry WebBook

3858.1

kJ/kg

1659.8

Btu/lb

EntropyNTP (normal temperature and pressure) = 20°C (68°F) and 1 atm. NIST Chemistry WebBook

53.14

J/g-K

12.70

Btu/lb-°R

Flame temperature in airNational Aeronautical and Space Administration, Safety Standard for Hydrogen and Hydrogen Systems (NSS 1740.16), 1997

2045

°C

3713

°F

Flammable range in airNTP (normal temperature and pressure) = 20°C (68°F) and 1 atm. National Aeronautical and Space Administration, Safety Standard for Hydrogen and Hydrogen Systems (NSS 1740.16), 1997

4.0 - 75.0

vol%

Ignition energy in airHydrogen Fuel Cell Engines and Related Technologies. Module 1: Hydrogen Properties. U.S. DOE. 2001

2.0 E-5

J

1.9 E-8

Btu

Internal Energy (NTP)NTP (normal temperature and pressure) = 20°C (68°F) and 1 atm. Reference state: Internal Energy U=0 at 273.16 K for saturated liquid; Entropy S=0 at 273.16 K for saturated liquid. NIST Chemistry WebBook

2648.3

kJ/kg

1139.3

Btu/lb

Molecular weightNIST Chemistry WebBook

2.02

Specific gravity (air = 1) (NTP)NTP (normal temperature and pressure) = 20°C (68°F) and 1 atm. Hydrogen Fuel Cell Engines and Related Technologies. Module 1: Hydrogen Properties. U.S. DOE. 2001

0.0696

Specific volume (NTP)NTP (normal temperature and pressure) = 20°C (68°F) and 1 atm. NIST Chemistry WebBook

11.94

m³/kg

191.26

ft³/lb

Specific heat at constant pressure, Cp (NTP)NTP (normal temperature and pressure) = 20°C (68°F) and 1 atm. NIST Chemistry WebBook

14.29

J/g-K

3.415

Btu/lb-°R

Specific heat at constant volume, Cv (NTP)NTP (normal temperature and pressure) = 20°C (68°F) and 1 atm. NIST Chemistry WebBook

10.16

J/g-K

2.428

Btu/lb-°R

Thermal conductivity (NTP)NTP (normal temperature and pressure) = 20°C (68°F) and 1 atm. NIST Chemistry WebBook

0.1825

W/m-K

0.1054

Btu/ft-h-°R

Viscosity (NTP)NTP (normal temperature and pressure) = 20°C (68°F) and 1 atm. NIST Chemistry WebBook

8.813 E-5

g/cm-sec

5.922 E-6

lb/ft-sec

Videos

Two fellows from the Fuel Cell Technologies Office show off an electrolyzer and fuel cell demonstration to...
This is a hydrogen station introduction video developed in Oct 2016 in response to a request from the Fire...
H2Tools is a portal of resources for the advancement of hydrogen safety.
Operational Overview and Hydrogen Safety Training when dealing with a containerized fuel cell generator, used...
Hydrogen verses propane flame comparison, and differences in precautions that should be taken in each case,...
The Energy Department's Fuel Cell Technologies Office (FCTO) announced the launch of a new, free, online...

Hydrogen Conversion Calculator

You may use this calculator to do simple conversions between four popular phase points of hydrogen

  • Liquid at boiling point (-252.87°C at 1 atm).
  • Gas at Normal Temperature and Pressure (NTP = 20°C at 1 atm).
  • Gas at standard conditions (15.6°C at 1 atm).
  • Gas at standard conditions (0°C at 1 atm).

Training Resources

National Hydrogen and Fuel Cell Emergency Response Training Resource

Featured Resource! The California Fuel Cell Partnership and the Pacific Northwest National Laboratory collaborated to develop a national hydrogen safety training resource for emergency responders. The resource provides a single repository of credible and reliable information related to hydrogen and fuel cells that is current and accurate and eliminates duplicative efforts among various training programs. This approach will enable government and private training organizations nationwide to develop their own training programs with consistent hydrogen and fuel cells content and standards. See more information about using this resource.

Introduction to Hydrogen Safety for First Responders

DOE's Introduction to Hydrogen Safety for First Responders is a Web-based course that provides an "awareness level" overview of hydrogen for fire, law enforcement, and emergency medical personnel. This multimedia tutorial acquaints first responders with hydrogen, its basic properties, and how it compares to other familiar fuels; hydrogen use in fuel cells for transportation and stationary power; potential hazards; initial protective actions should a responder witness an incident; and supplemental resources including videos, supporting documents, and links relevant to hydrogen safety.