The energy balance equations for the various phases and components are described by Equation S6 using the variables and parameters defined in Table . The properties of the gas phase (subscript g), sorbent phase (subscript s), wall of the contactor shell (subscript w) and the external heat transfer fluid (subscript e) are modelled as follows. Momentum balance for the column is solved using Ergun equation as shown in Equation S7 where velocity and viscosity of gas are changing along the axis of the column. The meaning and values of the variables and parameters are described in Table .