Sherwood’s plot: fundamental or empirical?

Document Type: Research Note

Author

Fac. Eng. Un. Porto

Abstract

There are several examples of heuristic rules first proposed from empirical observation, which eventually earned physicochemical validity after fundamental derivation a posteriori. This is the case of Sherwood’s plot – for which a sound rationalization from first principles (entailing enthalpy and mass balances) is provided here; it applies to fine chemicals undergoing concentration followed by purification, where the cost of the latter override.

There are several examples of heuristic rules first proposed from empirical observation, which eventually earned physicochemical validity after fundamental derivation a posteriori. This is the case of Sherwood’s plot – for which a sound rationalization from first principles (entailing enthalpy and mass balances) is provided here; it applies to fine chemicals undergoing concentration followed by purification, where the cost of the latter override.

Keywords