Design of a Fully Heat-Integrated Pressure-Swing Distillation for Close-Boiling Separation

Enlightened by recent progress in pressure-swing distillation (PSD) and double-effect heat integration, this work combines these two concepts for close-boiling separation, by using two fully heat-integrated columns operating at different pressure plus a recycle stream. The developed fully heat-integ...

Full description

Saved in:
Bibliographic Details
Published inChemical engineering transactions Vol. 69
Main Authors Zhijun Xi, Chengtian Cui, Jincai Chen, Siyao Liu, Jinsheng Sun
Format Journal Article
LanguageEnglish
Published AIDIC Servizi S.r.l 01.10.2018
Online AccessGet full text

Cover

More Information
Summary:Enlightened by recent progress in pressure-swing distillation (PSD) and double-effect heat integration, this work combines these two concepts for close-boiling separation, by using two fully heat-integrated columns operating at different pressure plus a recycle stream. The developed fully heat-integrated pressure swing distillation (FHIPSD) is therefore proposed, followed by two close-boiling binary systems with different relative volatility and latent enthalpy as case studies. The main advantage of the FHIPSD is to lower the separation difficulty of each column, circumventing manufacturing a very high column. For certain feed conditions, the FHIPSD can save energy cost and provide higher-temperature residual heat for further heat integration, compared to a conventional distillation column (CDiC).
ISSN:2283-9216
DOI:10.3303/CET1869149