Heterogeneous catalysis is of paramount importance in chemical industry, but it often involves incorporating difficult and mass transfer limited unit operations. The SpinPro Reactor has proven itself to drastically increase solid-liquid mass transfer rates, while simultaneously tackling the problems involved in downstream solids handling.
The SpinPro consists of three rotor-stator stages in series. Each compartment consists of a rotating disc, the rotor, which rapidly spins at velocities up to 3,000 RPM. The stationary encasing, the stator, is in close proximity to the disc. Typical rotor-stator distances are of the order of a millimeter. The high degree of turbulence invoked by the disc and the large amount of shear in the narrow cavity result in strongly improved mass transfer behaviour.
The figure on the right illustrates that The SpinPro consists of three compartments containing rapidly rotating discs, which intensify chemical processes by significantly
increasing mass transfer rates. Moreover, by catalytically coating the disc, catalyst entrapment can be ensured while downstream solid processing to recover the solid catalyst can be prevented.
In fact, for heterogeneously catalysed systems, solid-liquid mass transfer coefficients of kLSaLS = 0.22 m3L m-3R s-1, were obtained. To put this in perspective; this is an order of magnitude higher than values obtained in typical packed bed reactors.
Furthermore, Flowid holds a recipe for catalytically coating the rotating disc. This innovative procedure not only results in increased mass transfer performance, it simultaneously ensures that the expensive catalyst is physically entrapped inside the reactor. With this configuration, there is no need for downstream processing to recover the catalyst, and wasting of catalyst can be prevented.