Table 1 Physical parameters of methane and hydrogen.

From: Research on hydrogen distribution characteristics in town hydrogen-doped methane pipeline

Gas

Relative density

Volume low calorific value

(MJ m−3)

Mass low calorific value

(MJ kg−1)

Flame speed (cm s−1)

Minimum Ignition Energy (MJ)

CH4

0.5548

34.04

50.3

43

0.033

H2

0.0695

10.23

119.9

350

0.018