May 2013

Bonus Report: Petrochemical Developments

Consider novel CGC and front-end depropanizer system for olefins production

In the presented case study, an innovative design for an integrated CGC-DeC3 system introduces part of the heavier condensate from the early compression stages directly into the high-pressure (HP) depropanizer.

Xu, Q., Fu, J., Zhao, C., Lamar University

In many liquid-cracking ethylene facilities, the multistage charge-gas compressor (CGC) is used with a front-end depropanizer (DeC3) process. The optimal design and operation of an integrated CGC-DeC3 system can provide energy savings and other benefits. In the presented case study, an innovative design for an integrated CGC-DeC3 system introduces part of the heavier condensate from the early compression stages directly into the high-pressure (HP) depropanizer. Result: The compression work and CGC stripper loading are reduced. This design also lowers heat duty for part of the heat-exchanger network. Using rigorous simulation, this new conceptual design can offer significant energy-saving pot

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