Experimental procedure using a Wetted Wall Column for ammonia based CO2 absorption

https://doi.org/10.1016/j.dib.2018.02.047

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The experimental procedure for measuring the overall mass transfer coefficient is described by the following points:

1.

prepare the solvent with the desired ammonia concentration and loading;

2.

measure the density and the viscosity of the solvent;

3.

flush the system with nitrogen for at least 15 min, corresponding to more than 300 reaction chamber volumes;

4.

introduce the solvent in the experimental setup and pump the solvent in the liquid circuit until it forms a stable and uniform liquid film on the cylinder in the reaction chamber;

5.

set the temperature of the thermostatic bath and wait that the temperature of the reaction chamber is stable at the desired value;

6.

when the CO₂ probe reports a null concentration of CO₂ the set-up is ready for the experiment;

7.

send a flow of N₂ and CO₂ with the desired concentration into the bypass gas line and measure the CO₂ concentration at steady state condition;

8.

direct the gas to the reaction chamber and measure the CO₂ concentration at steady state condition;

9.

repeat the last two points for four other different gas mixtures;

10.

measure five points at different concentration of CO₂ following the procedure here described in the points 7–9;

11.

flow nitrogen in the set-up for 20–30 min and at least 10 l of water in order to clean up the set-up;

This procedure has been repeated at temperatures of 15 °C, 25 °C and 35 °C, ammonia concentrations of 5%, 10% and 15% and CO₂ loadings of 0.2, 0.4 and 0.6 (0.5 for 15% of ammonia to avoid salt precipitations) for a total of 27 cases (3 × 3 × 3).

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