Formation kinetics are investigated in semi-batch operation for different reactor pressures and for multiple captureregeneration cycles. In these cycles, the capture phase is according to the description of a semi-batch experiment while for the regeneration phase the reactor vessel is depressurized and remains open for at least 12 h to ensure complete dissociation of the hydrate. Fig. shows the mole fraction of CO 2 in the gas mixture during the capture phase obtained from consecutive cycles. Each series begins with a fresh packed bed and is designed to operate at a specific pressure level -specifically, either 40, 30, or 20 bar. After the start of the experiment, the CO 2 fractions start to decrease from their initial value of 15 mol% and approach thermodynamic equilibrium. While the CO 2 fraction decreases fast at the beginning of the experiment, the rate of change almost vanishes in the final third of it. Despite the fact that the mole fraction continues to decrease by the experiment's end, Fig. illustrates clearly that extending the duration further is simply impractical for the purpose of this study. Hence, the steady-state definition of thermodynamic equilibrium used in this work always overestimates the actual values which could be more accurately approximated by extending the duration of the experiment significantly. A closer look at the very first few minutes still reveals a small drop in CO 2 fraction occurring practically immediately after pressurization. This small drop, which gets more pronounced as the pressure increases, can be attributed to the selective adsorption of CO 2 on the solidified dry water. Yet, the drop due to adsorption can be clearly discriminated from the subsequent and significantly larger drop occurring as a result of hydrate formation. Subsequent cycles do not exhibit a pronounced induction period, suggesting a much faster hydrate nucleation in the regenerated packed bed of ice at low formation pressures. The significant reduction in the induction period observed for hydrate formation when starting from ice (or liquid water) with a prior hydrate history is a well-known phenomenon, commonly referred to as the "memory effect". Although the underlying mechanisms behind the memory effect are not fully understood , yet, our results clearly indicate its usefulness in the application of HBCC, where numerous formation-dissociation cycles are required. A more nuanced perspective on the interplay between adsorption, hydrate formation, and the memory effect at the initial phase of capture is provided in the following section on continuous experiments.