Scale-up consideration for polymerization in a twin-screw extruder using 3-D numerical simulation

Linjie Zhu, Kwabena Narh, Run S. Hyun

Research output: Contribution to conferencePaper

2 Citations (Scopus)

Abstract

Scaling up a polymerization process in the fully filled screw elements of co-rotating twin-screw extruders was investigated with a 3-D Finite Volume Method. The simulation results show that, with identical mean residence time in the screw elements, the polymerization progression is accelerated when the screw diameter is increased. Moreover, the difference in conversion based on 1-D and 3-D models becomes more significant with increasing screw dimension, indicating that 1-D model can not predict the polymerization progression correctly in large extruders. The polymerization requires short screw length (L/D) to complete when the screw diameter is increased. This may be due to the fact that the heat loss through the barrel surface is more difficult to occur, and the non-uniformity in temperatures at the cross section of screw elements becomes more pronounced after scaling up.

Original languageEnglish (US)
Pages340-344
Number of pages5
StatePublished - Jun 1 2004
EventANTEC 2004 - Annual Technical Conference Proceedings - Chicago, IL., United States
Duration: May 16 2004May 20 2004

Other

OtherANTEC 2004 - Annual Technical Conference Proceedings
CountryUnited States
CityChicago, IL.
Period5/16/045/20/04

Fingerprint

Extruders
Polymerization
Computer simulation
Finite volume method
Heat losses

All Science Journal Classification (ASJC) codes

  • Chemical Engineering(all)
  • Polymers and Plastics

Keywords

  • Reactive Extrusion
  • Scale up
  • Simulation

Cite this

Zhu, L., Narh, K., & Hyun, R. S. (2004). Scale-up consideration for polymerization in a twin-screw extruder using 3-D numerical simulation. 340-344. Paper presented at ANTEC 2004 - Annual Technical Conference Proceedings, Chicago, IL., United States.
Zhu, Linjie ; Narh, Kwabena ; Hyun, Run S. / Scale-up consideration for polymerization in a twin-screw extruder using 3-D numerical simulation. Paper presented at ANTEC 2004 - Annual Technical Conference Proceedings, Chicago, IL., United States.5 p.
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Zhu, L, Narh, K & Hyun, RS 2004, 'Scale-up consideration for polymerization in a twin-screw extruder using 3-D numerical simulation' Paper presented at ANTEC 2004 - Annual Technical Conference Proceedings, Chicago, IL., United States, 5/16/04 - 5/20/04, pp. 340-344.

Scale-up consideration for polymerization in a twin-screw extruder using 3-D numerical simulation. / Zhu, Linjie; Narh, Kwabena; Hyun, Run S.

2004. 340-344 Paper presented at ANTEC 2004 - Annual Technical Conference Proceedings, Chicago, IL., United States.

Research output: Contribution to conferencePaper

TY - CONF

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AU - Zhu, Linjie

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N2 - Scaling up a polymerization process in the fully filled screw elements of co-rotating twin-screw extruders was investigated with a 3-D Finite Volume Method. The simulation results show that, with identical mean residence time in the screw elements, the polymerization progression is accelerated when the screw diameter is increased. Moreover, the difference in conversion based on 1-D and 3-D models becomes more significant with increasing screw dimension, indicating that 1-D model can not predict the polymerization progression correctly in large extruders. The polymerization requires short screw length (L/D) to complete when the screw diameter is increased. This may be due to the fact that the heat loss through the barrel surface is more difficult to occur, and the non-uniformity in temperatures at the cross section of screw elements becomes more pronounced after scaling up.

AB - Scaling up a polymerization process in the fully filled screw elements of co-rotating twin-screw extruders was investigated with a 3-D Finite Volume Method. The simulation results show that, with identical mean residence time in the screw elements, the polymerization progression is accelerated when the screw diameter is increased. Moreover, the difference in conversion based on 1-D and 3-D models becomes more significant with increasing screw dimension, indicating that 1-D model can not predict the polymerization progression correctly in large extruders. The polymerization requires short screw length (L/D) to complete when the screw diameter is increased. This may be due to the fact that the heat loss through the barrel surface is more difficult to occur, and the non-uniformity in temperatures at the cross section of screw elements becomes more pronounced after scaling up.

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Zhu L, Narh K, Hyun RS. Scale-up consideration for polymerization in a twin-screw extruder using 3-D numerical simulation. 2004. Paper presented at ANTEC 2004 - Annual Technical Conference Proceedings, Chicago, IL., United States.