April 2009

Special Report: Achema 2009/ Petrochemical Developments

Improve product ethylene separation

New high-capacity trays enable retrofitting existing splitter superfractionator to expand unit capacity and conserve energy

Bernard, A., Nova Chemicals (Canada) Ltd.; de Villiers, W., Shell Global Solutions; Summers, D. R., Sulzer Chemtech USA, Inc.

The Nova Chemicals (Canada) Ltd. complex located in Sarnia, Ontario, Canada, was recently revamped in 2005 to improve a previously upgraded C2 splitter tower performance. After careful examination of the existing design, desired operation and future capacity, new high-capacity distillation trays were chosen to replace older tower trays. This approach would replace the internals at larger tray spacings with fewer trays. An increase in tray efficiency was expected and required to achieve the overall performance goal of the revamp. After a successful installation, the unit was restarted and the desired performance was achieved. This article presents the operating information for the tower so th

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