PRESSURE SWING ADSORPTION FOR THE PURIFICATION OF HYDROGEN

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PRESSURE SWING ADSORPTION FOR THE PURIFICATION OF HYDROGEN ( pressure-swing-adsorption-forpurification-hydrogen )

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Notation and glossary π‘Žπ‘– number of neighbouring sites occupied by the adsorbate molecule in the multisite Langmuir isotherm, dimensionless 𝐴 Bed area 𝐢𝑝,π‘Žπ‘‘π‘  Heat capacity of adsorbent material 𝐢𝑝,𝑀 Heat capacity of the wall material 𝑑𝑏 Bed diameter 𝑑𝑝 Adsorbent particle diameter π·π‘Žπ‘₯ Dispersion coefficient h Fluid mass specific enthalpy hπ‘Žπ‘‘ Enthalpy of adsorbed component [m2] [kJ/kg βˆ™ K] [kJ/kg βˆ™ K] [m] [m] [m2/s] [kJ/kg] [kJ/mol] [kJ/mol] [mol/kg] [mol/(kg βˆ™ K)] [atmβˆ’1] [K] [K] [bar] [W/(K βˆ™ m2)] [W/(K βˆ™ m2)] [m] [kg/mol] [bar] hβˆ…(𝑇) 𝑖 Pure component enthalpy at the bed temperature and standard pressure (1 bar). π‘˜1 Langmuir-Freundlich isotherm parameter π‘˜2 Langmuir-Freundlich isotherm parameter π‘˜3 Langmuir-Freundlich isotherm parameter π‘˜4 Langmuir-Freundlich isotherm parameter π‘˜5 Langmuir-Freundlich isotherm parameter, dimensionless π‘˜6 Langmuir-Freundlich isotherm parameter 𝐾𝑖 Equilibrium constant in the Multisite Langmuir π‘˜π‘‡,𝑏𝑀 Heat transfer coefficient from bed to wall π‘˜π‘‡,π‘€π‘Ž Heat transfer coefficient from wall to ambient 𝑙𝑀 Bed wall thickness π‘€π‘Š Molecular weight 𝑃 Bed pressure Pressure Swing Adsorption for Hydrogen Purification vii

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