Concentration Limits of Hydrogenous Mixtures with Helium

4 Concentration Limits of Hydrogenous Mixtures with Helium 

Mixtures with helium are specified by the position of the limit curve tip. Due to the high helium diffusion constants, the tip is on the stoichiometry line. The increase in the initial temperature broadens the combustibility region (see Fig. 4.4). 

5 Concentration Limits of Combustion of Hydrogenous Mixtures with Water Steam 

The solid curve in Fig. 4.5 shows the measured data [8] obtained in the vertical heated tube at 373 K temperature and lower-than-atmospheric pressure. The pressure used was in the range between 0.02 and 0.051 MPa depending on the supplied 

The calculation method of igniting mixtures with water steam, that was developed by the IChPh [13], was used to calculate the limit curve and to determine how significant the discrepancies within the limit data obtained in [8, 9] were. The 

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