AeH: H2 data

Spanish Hydrogen Association

Hydrogen and Fuel Cells Technologies

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HYDROGEN DATA

1. Density:	0,0899 kg/Nm³ (gas) 0,0708 kg/l (liquid)
2. Lower heating value	120 MJ/kg
Higher heating value:	141,86 MJ/kg
3. Explosion limits:	4,0 - 75,0 % (H₂ concentration in air)
4. Detonation limits:	18,3 - 59,0 % (H₂ concentration in air)
5. Specific heat capacity:	C_p=14,199 J/(kg·K) C_v=10,074 J(kg·K)
6. Diffusion coefficient:	0,61 cm²/s
7. Compressibility factor :	according to the following table

Pressure (bar)	1	50	100	150	200	250	300	350	400	500	600	700	800	900	1000
Compr. factor	1	1,032	1,065	1,089	1,132	1,166	1,201	1,236	1,272	1,344	1,416	1,489	1,560	1,632	1,702

Example of application of the compressibility factor: 1 bottle of 50 litres at 200 bars of hydrogen contains at 0ºC: 0,050 m³ ·200 / 1,132 = 8,834 Nm³

EQUIVALENCES

HYDROGEN - ENERGY

H₂(kg)	↔	H₂ gas (Nm³)	↔	liquid H₂¹(litres)	↔	Energy²(MJ)	↔	Energy²(kW·h)
1	=	11,12	=	14,12	=	120	=	33,33
0,0899	=	1	=	1,270	=	10,8	=	3,00
0,0708	=	0,788	=	1	=	8,495	=	2,359
0,00833	=	0,0926	=	0,1177	=	1	=	0,278
0,0300	=	0,333	=	0,424	=	3,6	=	1

1 Hydrogen is liquid at atmospheric pressure bellow 20,39 K

2 Based of the lower heating value

HYDROGEN FLOW – ELECTRIC POWER

Kg/h of H₂	↔	Nm³/h of H₂ gas	↔	litres/h of H₂ líquid¹	↔	Power²(kW)
1	=	11,12	=	14,12	=	33,33
0,0899	=	1	=	1,270	=	3,00
0,0708	=	0,788	=	1	=	2,359
0,00833	=	0,0926	=	0,1177	=	0,278
0,0300	=	0,333	=	0,424	=	1

1 Hydrogen is liquid at atmospheric pressure bellow 20,39 K

2 Based of the lower heating value

COMPARISON HYDROGEN - OTHER FUELS

Based of the lower heating value

1 kg of H₂ ↔ 2,78 kg of petrol ↔ 2,40 kg of methane ↔ between 2,54 and 3,14 kg of natural gas (depending of the NG composition) ↔ 2,59 kg of propane ↔ 2,62 kg of butane ↔ 6,09 kg of methanol

1 litre of liquid H₂ ↔ 0,268 litres of petrol ↔ 0,431 litres of methanol

1 litre of H₂ (at 350 bar) ↔ 0,0965 litres of petrol ↔ 0,240 litres of methane (at 350 bar) ↔ between 0,3 and 0,35 litres of natural gas (at 350 bar) ↔ 0,117 litres of propane (at 350 bar) ↔ 0,127 litres of butane (at 350 bar) ↔ 0,191 litres of methanol

This information has been prepared by ARIEMA. If you find any mistake, or you want to make any kind of suggestion, please contact us at aeh.web@ariema.com.

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