04/16/2010

LIST AG DRY PROCESSING -, INTELLIGENT PROCESSING

PREDICTION OF MASS TRANSPORT OF SOLVENT / POLYMER SYSTEMS IN HIGH VOLUME KNEADER REACTORS AT FINITE SOLVENT CONCENTRATIONS

Kneader reactors are used for combined unitary processing in the polymer industry for devolatilization, compounding or polymerization. In the past, mass transport prediction for devolatilization operations in kneader reactors did not match experimental results, when diffusion was assumed as sole driving force. It was detected that there is an additional concentration and temperature dependent driving force that triggers enhanced
transport at finite solvent concentrations by orders of magnitude. The author suggests that the underlying root cause is likely micro bubble formation within the polymer melt. An attempt to model this additional mass transport mechanism is presented.


Read more under: http://www.list.ch/downloads/pdf/0049.pdf