For bed configuration d) with ideal in situ separation of NH3 at 𝑧 = 𝑧 the expected axial profile of NH3 molar flow rate in both parts of the catalyst bed is shown in Figure (black, dashed line). In the first part of the catalyst bed upstream of the sorbent bed (𝑧 < 𝑧 ) the profile is equal to the reference case without sorbent, as expected. At the location of the sorbent bed (𝑧 = 𝑧 ) the assumed ideal separation leads to a drop in NH3 molar flow rate down to zero. In the second part of the catalyst bed downstream of the sorbent bed (𝑧 > 𝑧 ), the molar flow rate increases again and reaches a certain value at the reactor outlet asymptotically, denoted as 𝑛̇ , . Note that for bed configuration d) the sorbent bed is placed in the middle of the split catalyst bed, which means that 𝑧 = 0.5𝐿.