First step in the ARcconstruction for cSSF. PFR and CSTR from feed point F to point A (full ethanol yield). Green trajectories correspond to PFR with feed points along the CSTR. The gray shaded region represents the convex hull of all the trajectories. The feed stream corresponds to washed solids at 0.2 solid fraction and all reactors are fed with F as denoted by italic letters above the reactor’s feeds.