Experiments in batch mode are primarily conducted for the exploration of the V-I-H equilibrium curve at constant temperature. Contrary to the semi-batch case, batch experiments are executed in a closed system, hence, no gas is supplied during the experiment. Consequently, in the system considered, a net growth or decrease of the hydrate phase inevitably results in a reduction or increase of system pressure, respectively. Similarly, the CO 2 fraction in the gas phase will change accordingly. Only states on the V-I-H curve exhibit no change. This absence of change is used as the criterion for reaching equilibrium. For practical reasons, a change in the CO 2 fraction of less than 0.1 mol% in 60 minutes is used as a threshold value for meeting equilibrium. Batch experiments are typically carried out subsequently to semi-batch experiments by reducing the reactor pressure from values on the V-I-H curve in small steps and waiting for the system to attain equilibrium again. In cases where the attainment of equilibrium is slow because of small rates of dissociation, the reactor pressure is instead increased in small increments starting from equilibrium. Fig. depicts these procedures with open and filled markers indicating non-equilibrium and equilibrium states, respectively.