These findings indicate a pressure-dependent trade-off in the temperature effect: High temperatures lead to high catalyst activity and consequently to high NH3 partial pressures, which lead to higher sorption capacities. At the same time, at constant NH3 partial pressure the sorption capacity decreases with raising temperature. Hence, the reaction conditions of sorption-enhanced NH3 synthesis need to be optimized with respect to temperature and pressure, while both are linked via the NH3 formation rate respective catalyst activity. . This could be explained by the discussed higher slip of NH3 through the sorbent bed for the second cycle (see Figure ). Hence, the sorptive separation is less ideal in the kinetic regime than assumed in the model and leads to the observed deviations. Especially at very low 𝑝 𝑝 , ⁄ , even the small amounts of NH3 cause a kinetic inhibiting effect, consequently reducing the sorption-enhancement effect. . All experiments carried out using the Fe catalyst under the experimental conditions summarized in Table .