Positive sensitivity values indicate that increasing the reaction rate constant or species enthalpy leads to an increase in descriptors, while negative sensitivity values represent a decrease in descriptor values. Reactions happen at an extremely small timescale, and species' concentrations reach a steady state near the start of the catalyst zone in these simulations, so the catalyst surface to volume ratio is decreased to 5% of the value in when doing sensitivity analyses and descriptor screenings. As a consequence, the distance from the beginning of the reactor to reach steady state is extended. This extension ensures that the chemistry happening at the descriptor sample position remains comparable between models with and without BMAs.