relates the molar ratio of CO 2 and N 2 captured to that in the residual gas leaving the reactor at the outlet. This term could reach infinity, if no N 2 would occupy hydrate cages and the entire CO 2 of the feed stream would be consumed in the process of hydrate formation. The molar ratios can be readily obtained by integrating the individual mass flows over the entire duration of the experiment and applying the ideal gas law.