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In-line measurement of residence time distribution in a co-rotating twin-screw extruder

Authors
Journal
Food Research International
0963-9969
Publisher
Elsevier
Publication Date
Volume
36
Issue
5
Identifiers
DOI: 10.1016/s0963-9969(02)00193-x
Keywords
  • In-Line Monitoring
  • Residence Time Distribution
  • Food Extrusion
  • Tanks In Series Model
  • Near Infrared And Charge Coupled Device Spectrometer

Abstract

Abstract The residence time distribution in an intermeshing, co-rotating twin-screw extruder was measured in-line and off-line by stimulus–response technique. FD&C Red 40 was used as the tracer for the study. The die concentration was monitored in-line using a fiber-optic- equipped vis-near Infrared spectrometer while the color concentration in the off-line samples was measured using a charge coupled device (CCD) spectrometer. The in-line results correlated well with the off-line method. The effect of feed rate, water content and temperature on the residence time distribution were precisely determined and fit by the tanks in series (TIS) model.

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