Like in the semi-batch cases, the same packed bed of solidified dry water is used for a whole series of cycles to explore the effect of cycle number, i.e., bed age. Cumulative masses of captured CO 2 are shown in addition to the CO 2 fractions at the reactor inlet and outlet to ease the discussion on absolute capture rates. Note that the pressurization period is excluded from the integration of the cumulative masses, as they are not directly associated to gas hydrate formation. Mechanisms of capture. Focusing on the CO 2 fraction at the reactor outlet, the same general behavior can be observed in all experiments. The behavior can be best explained using a superposition of two distinct phenomena which follow two different time scales. The first phenomenon features an immediate drop of the CO 2 fraction by a small amount proportional to the CO 2 fraction of the feed gas and to the reactor pressure and can be best explained as the selective adsorption of CO 2 on the gas-solid interface. The second phenomenon features a significantly larger decrease of the CO 2 fraction. It occurs at a much later and more random time, pointing towards the stochastic nature of hydrate nucleation and growth. In cases of particularly long induction periods, the CO 2 fraction at the outlet gradually increases and eventually approaches the concentration of the feed gas. This effect is most pronounced during the initial cycle when using a feed gas with 5 mol% of CO 2 (cf. Fig. in ESI †). There, no hydrate nucleation can be observed within the first hour. In consequence, the gas composition at the reactor outlet must approach that of the feed gas once all available adsorption sites are occupied. The only way the CO 2 fraction can decrease again afterwards is the nucleation and subsequent growth of mixed hydrates, which in this case actually happened after increasing the reactor pressure from 40 to 50 bar, thus amplifying the driving force for hydrate nucleation. The pressure increase almost instantaneously triggered hydrate growth and led to a pronounced decrease in CO 2 fraction at the reactor outlet, similar to the ones observed in subsequent cycles. For all other cases, induction times are significantly shorter and, remarkably, for the subsequent cycles, a pressure of 40 bar eventually becomes sufficient to trigger hydrate growth (cf. Fig. in ESI †). Induction times decrease most significantly from the first to the second capture-regeneration cycle and remain nearly identical for all subsequent cycles. This behavior is similar to the observations made in semi-batch experiments and can again be attributed to the previously mentioned memory effect .