Model-based sorption-enhancement factor flow rate from reactor inlet to the half of the catalyst bed is identical for both profiles. Due to the assumed ideal sorption, the profile with sorptive removal drops down to a NH3 molar flow rate of zero at half of the catalyst bed. The effect of the sorptionenhancement is visible by comparing the profiles in the catalyst beds before (𝑧 < 𝑧 ) and after (𝑧 > 𝑧 ) the sorbent bed for the conventional and the sorption-enhanced case. In the case of the conventional synthesis reaction, the gradient in the second half of the catalyst bed decreases compared to the first half due to the reduction of the reaction rate by thermodynamic and/or kinetic limitations caused by the increasing NH3 partial pressure. Since NH3 is absent at the inlet of both the segments the second half of the sorption-enhanced profile is equal to the first half. ).