Interconnected stirred tank reactors

Figure 2.3 The two most common scale-down simulators. The graphics below each picture depict the substrate concentration that a cell circulating in the simulator would experience, (a) Two interconnected stirred-tank reactors (STR-STR) with independent environmental parameter control. Cells are circulated between them, experiencing a square oscillation as depicted in the graphic at the bottom. The liquid volumes and flow rate determine the average to be evaluated, (b) A plug-flow reactor connected to a stirred-tank reactor (STR-PFR). Environmental perturbations...

During the creation of a flowsheet diagram, many variants have to be considered, e.g. the reaction part can be realized through a stirred tank reactor, or a tubular reactor, or the interconnection of these reactor types with an intermediate separator. Method fragments can guide the process by automatically generating the chosen alternatives. 

In SSITKA, it is assumed that the catalyst surface is a system made up of a number of interconnected compartments. Each compartment is a homogeneous or well-mixed system like a continuous stirred tank reactor (CSTR). A separate compartment is assumed to be present for each uniquely adsorbed reaction intermediate species. Based on this assumption, the response of a single unidirectional reaction step to a step change in the isotopic concentration of one of the reactants, which is made at time t = 0, is given as... 

---