Energy optimization and comparative study of pre- and post-fractionator extractive dividing wall column for the CO2–ethane azeotropic process

CATEGORY: FRACTIONATORS
Energy Conversion and Management, Volume 79, March 2014, Pages 590–598
Energy optimization and comparative study of pre- and post-fractionator extractive dividing wall column for the CO2–ethane azeotropic process
Yadollah Tavan (a), Seiied Hadi Riazi (b), Mostafa Nozohouri (c)
a National Iranian Gas Company (NIGC), Tehran, Iran
b Petroleum Engineering Department, Petroleum University of Technology, 63431 Ahwaz, Iran
c Automation and Instrumentation Engineering in Petroleum Industries, Petroleum University of Technology, 63431 Ahwaz, Iran
Abstract
Authors examined two possible extractive dividing-wall column (DWC) arrangements to find the potential benefits derived from thermally coupled distillations in separation of a mixture including the CO2–ethane azeotrope with a low boiling point.
They found that the process including pre-fractionator in the DWC design in its optimized state leads to 51.6% reduction in total duties, as compared to the conventional process.
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