https://doi.org/10.1016/j.egypro.2017.03.1211
“A flow micro-calorimeter by Thermal Hazard Technology (UK) connected to a URC control software as shown in
Figure 2 was used to evaluate the heat and loading of CO2 absorption of the amines. The equipment was set to operate
at 298.15 – 353.15 K (± 1 K) with its allowable gas flow rate being 0 to 20 ml/min (± 0.1 ml/min).
The cell containing sample was placed into the calorimeter at 313.15 K and atmospheric pressure. The initial
variation in the power at the early stage of the test is recorded by the software. Afterwards, Next, CO2 flows at 0.5
ml/min (± 0.01 ml/min) into the sample cell after passing through a desiccant column. The exothermic reaction
between CO2 and the aqueous amine solution results in an initial increase and decrease in th e power signal before it
becomes stable once the reaction reaches equilibrium.
The weights of the cell only, the cell + sample, and the cell + sample + absorbed CO2 were noted to calculate the
mass of CO2 absorption absorbed during the experiment. The integral heat Q (in kJ) was determined from the URC
analysis software and the heat of absorption ΔH (- kJ/mole of CO2) is obtained by dividing the integral heat, Q (in kJ),
by the mole of CO2 absorbed.
“