Besides the high H2 conversion, which is an important objective due to the possibility of reducing the need to recycle, the NH3 productivity is another important key performance indicator. However, high conversion and high productivity do not always coincide and thus pose a two-objective maximization problem. This work does not represent an attempt to solve this optimization problem, but to discuss the complex interplay of different operating parameters in SEAS. In Figure , sets of solutions are depicted, where each set is derived at constant pressure, temperature and sorbent ratio, leaving the GHSV as variable. They all show a curved course from the bottom right towards the top left with increasing GHSV.