Absorption of CO2 is an exothermic process resulting in an
overall increase in the temperature of the solvent which will
limit the driving force for absorption and hence lower the
absorption capacity of the solvent system. At lower temperatures,
the kinetics of the system are limited, however,
vapour–liquid-equilibrium characteristics will be favourable.
At higher temperatures, the kinetics become more favourable
(improved viscosities and diffusion coefficients resulting in
higher mass transfer coefficients)