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Global minimization of total exergy loss of multicomponent distillation configurations

Journal Article · · AIChE Journal
DOI:https://doi.org/10.1002/aic.16737· OSTI ID:1547572
 [1];  [1];  [1];  [1];  [2];  [1]
  1. Davidson School of Chemical Engineering Purdue University West Lafayette Indiana
  2. Krannert School of Management Purdue University West Lafayette Indiana

Abstract

The operating cost of a multicomponent distillation system comprises two major aspects: the overall heat duty requirement and the temperature levels at which the heat duties are generated and rejected. The second aspect, often measured by the thermodynamic efficiency of the distillation system, can be quantified by its total exergy loss. In this article, we introduce a global optimization framework for determining the minimum total exergy loss required to distill any ideal or near‐ideal multicomponent mixture using a sequence of columns. Desired configurations identified by this new framework tend to use milder‐temperature reboilers and condensers and are thus attractive for applications such as heat pump assisted distillation. Through a case study of shale gas separations, we demonstrate the effectiveness of this framework and present various useful physical insights for designing energy efficient distillation systems.

Sponsoring Organization:
USDOE
Grant/Contract Number:
EE0005768
OSTI ID:
1547572
Journal Information:
AIChE Journal, Journal Name: AIChE Journal Journal Issue: 11 Vol. 65; ISSN 0001-1541
Publisher:
Wiley Blackwell (John Wiley & Sons)Copyright Statement
Country of Publication:
United States
Language:
English

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