How Can I Convert Nm3/hr To KG/HR? [PDF]

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Hydrogen Electrolyser Model: 8.66 Nm3/h Hydrogen gas and 4.33 m3/h Oxygen gas The ideal gas law demonstrates that: PV=nRT in which n=m/M n= mole number m= mass or mass flow (kg/h) V= volume or volumetric flow (m3/hr) M= molecular weight of the gas for example Molecular weight of hydrogen (H2) = 2 kg/kg.mole In Normal conditions according to the latest SI definition P=100 kPa (1 bar) and T=00C or 273.15 K R = gas constant =8.314 Pa.m3/mole.K So, PV = (m/M)*R*T or m(kg/h) = (P*V*M)/(R*T) At Normal conditions then we have: m(kg/h) = M* 100* V (Nm3/h) / (8.314*273.15) or m(kg/h) = 0.044 M* V (Nm3/h) Production: 8.66 Nm3/h of hydrogen is equal to: m = 0.044* 2 (molecular weight) * 8.66 (Nm3/h) m = 0.762 kg/h.