Minimum reflux calculation for multicomponent distillation in multi‐feed, multi‐product columns: Mathematical model

Jiang, Zheyu; Tawarmalani, Mohit; Agrawal, Rakesh

doi:10.1002/aic.17929

Title: Minimum reflux calculation for multicomponent distillation in multi‐feed, multi‐product columns: Mathematical model

Journal Article · 03 November 2022 · AIChE Journal

DOI: https://doi.org/10.1002/aic.17929 · OSTI ID:1896918

^[1]; Tawarmalani, Mohit ^[2];

^[3]

Davidson School of Chemical Engineering Purdue University West Lafayette Indiana USA, School of Chemical Engineering Oklahoma State University Stillwater Oklahoma USA
Krannert School of Management Purdue University West Lafayette Indiana USA
Davidson School of Chemical Engineering Purdue University West Lafayette Indiana USA

Abstract Multi‐feed, multi‐product distillation columns are ubiquitous in multicomponent distillation systems. The minimum reflux ratio of a distillation column is directly related to its energy consumption and capital cost. Thus, it is a key parameter for distillation systems design, operation, and comparison. In this series, we present the first accurate shortcut based algorithmic method to determine the minimum reflux condition for any general multi‐feed, multi‐product (MFMP) distillation column separating any ideal multicomponent mixture. The classic McCabe‐Thiele or Underwood method is a special case of this general approach. Compared with existing techniques, this method does not involve any rigorous tray‐by‐tray calculation, nor does it require guessing of key components. In this first part of the series, we present the mathematical model for a general MFMP column, derive constraints for feasible separation and minimum reflux condition, discuss their geometric interpretations, and present an illustrative example to demonstrate the effectiveness of our approach.

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Research Organization:: Purdue Univ., West Lafayette, IN (United States)

Sponsoring Organization:: USDOE; USDOE Office of Energy Efficiency and Renewable Energy (EERE)

Grant/Contract Number:: EE0005768

OSTI ID:: 1896918

Journal Information:: AIChE Journal, Journal Name: AIChE Journal Journal Issue: 12 Vol. 68; ISSN 0001-1541

Publisher:: Wiley Blackwell (John Wiley & Sons)Copyright Statement

Country of Publication:: United States

Language:: English

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37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
minimum reflux ratio
multi-feed distillation column
multi-product distillation column
multicomponent distillation
shortcut model

Title: Minimum reflux calculation for multicomponent distillation in multi‐feed, multi‐product columns: Mathematical model

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