Variation of Hydrogen Density with Pressure

Table 1 below shows the density of hydrogen at various pressures, and the associated volume for 1kg of hydrogen. All values taken at 20ᵒC.

Table 1 Variation of density and volume of hydrogen with pressure at 20ᵒC [1] %%(text-align:center) |Pressure (bar)|Density (kg/m3)|Volume of 1kg hydrogen (m^3)|Volume of 1kg hydrogen (litres) |Relevance |1 |%%(text-align:center)0.084%% |11.940 |11940.3 |Atmospheric |225 |16.31 |0.061 |61.3 |MCP |350 |23.65 |0.042 |42.3 |Riversimple vehicle storage |450 |28.83 |0.035 |34.7 |Buffer for fuelling to 350b |700 |39.69 |0.025 |25.2 |Possible future vehicle storage |850 |45.12 |0.022 |22.2 |Buffer for fuelling to 700b %%

[#1] Values of density taken from Wolfram|Alpha [www.wolframalpha.com]. \

Figure 1 shows a graph of the variation of density of hydrogen with pressure

[{Image src=’Pressure_Density.png’ align:center}]

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