H2 Cylinder
H2 Cylinder
(OP)
Dear Friends
Wish u very happy new year
i got one ?
i am using H2 Cylinder 51 inch height 9 inch dia pressure 125 kg/cm2 g
i am using hydrogen for my process
at 50 kg/cm2 i stopped the hydrogen.
is it possible to calc the remaining hydrogen amount with this data.
i don't know the cylinder weight
i know only initial amount,pressure and final pressure
can u able to help me
Wish u very happy new year
i got one ?
i am using H2 Cylinder 51 inch height 9 inch dia pressure 125 kg/cm2 g
i am using hydrogen for my process
at 50 kg/cm2 i stopped the hydrogen.
is it possible to calc the remaining hydrogen amount with this data.
i don't know the cylinder weight
i know only initial amount,pressure and final pressure
can u able to help me
K Madhavan





RE: H2 Cylinder
Then V, volume of the cylinder = M1 x 0.10715.
Thermodynamic tables would also tell you the specific volume of hydrogen at the final P, T conditions. At 25oC and the indicated pressure, it would be 0.25364 m3/kg.
Having estimated the volume V of the bottle before, you could now estimate the mass of hydrogen left in the bottle dividing the V by 0.25364.
If the assumed temperatures and the readings I took from the NIST tables are OK, the reduction in mass would be:
A Happy New Year.
RE: H2 Cylinder
PV = nRT
n = PV/RT
P = 50 kg/cm2 g = 711 lb/in2 g = 726 psia
V = 3.1415 x (4.5/12)^2 x (51/12) = 1.88 ft3
T = ?, so assume 60 F = 520 R
n = 726 x 1.88 / (10.73 x 520) = 0.247 lb-mols
m = n x MW = 0.247 x 2.01594 = 0.49 lb
Good luck,
Latexman
RE: H2 Cylinder
John