The sorbent was placed in between these two beds. This setup is used to measure the effect of the removal of NH3 produced in the first bed on the NH3 synthesis in the second catalyst bed. Figure shows that in the total sorption phase it is expected to observe NH3 produced in the second catalyst bed only. This is due to the fact that NH3 synthesized in the first bed is removed completely in the sorbent bed, while NH3 from the second bed is not affected by sorptive removal. During the partial sorption phase the breakthrough of NH3 through the sorbent bed is expected, which leads to the further increase in NH3 outlet molar flow rate, since the full catalyst mass contributes to the measured NH3 amount. Finally, the saturation phase is expected to provide identical NH3 outlet molar flow rates compared to the other bed configurations, as the saturated sorbent is inert in that case.