Correction procedures for extra-column effects in dynamic column breakthrough experiments

Dynamic column breakthrough experiments, routinely used to complement adsorption and diffusion studies at the particle scale, constitute an important step in the development and verification of dynamic models for simulation of adsorption processes. Various parts of the experimental set-up contribut...

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Main Authors: Rajendran, Arvind, Kariwala, Vinay, Farooq, Shamsuzzaman
Other Authors: School of Chemical and Biomedical Engineering
Format: Article
Language:English
Published: 2009
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Online Access:https://hdl.handle.net/10356/90917
http://hdl.handle.net/10220/4514
http://sfxna09.hosted.exlibrisgroup.com:3410/ntu/sfxlcl3?sid=metalib:ELSEVIER_SCIRUS&id=doi:&genre=&isbn=&issn=&date=2008&volume=63&issue=10&spage=2696&epage=2706&aulast=Rajendran&aufirst=%20A&auinit=&title=Chemical%20Engineering%20Science&atitle=Correction%20procedures%20for%20extra%2Dcolumn%20effects%20in%20dynamic%20column%20breakthrough%20experiments
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spelling sg-ntu-dr.10356-909172023-12-29T06:51:23Z Correction procedures for extra-column effects in dynamic column breakthrough experiments Rajendran, Arvind Kariwala, Vinay Farooq, Shamsuzzaman School of Chemical and Biomedical Engineering DRNTU::Engineering::Chemical engineering::Chemical plants DRNTU::Engineering::Chemical engineering Dynamic column breakthrough experiments, routinely used to complement adsorption and diffusion studies at the particle scale, constitute an important step in the development and verification of dynamic models for simulation of adsorption processes. Various parts of the experimental set-up contribute to the retention time and band broadening of the experimental breakthrough curve. However, the effect of the extra-column contributions have to be properly accounted for in order to compare the experimental results with theoretical calculations. A common practice is to measure a blank response under the same flow rate, pressure and temperature conditions as the actual experiment by simply bypassing the adsorption column with a tube (or a connector) of negligible volume. This blank response is then subtracted point-by-point from the composite response (i.e., including the adsorption column) to account for extra-column contributions. The underlying assumption here is that blank and column responses are linearly additive, both in terms of mean residence time and band broadening. It is shown that this method of correction can, under certain operating conditions, lead to erroneous results. An alternative procedure based on linear regression is introduced and the improvements achieved by this method are illustrated using simulation examples. Submitted version 2009-03-09T07:06:21Z 2019-12-06T17:56:24Z 2009-03-09T07:06:21Z 2019-12-06T17:56:24Z 2008 2008 Vol. 63, no. 10 (May 2008) Journal Article Rajendran, A., Kariwala, V., & Farooq, S. (2008). Correction procedures for extra-column effects in dynamic column breakthrough experiments. Chemical Engineering Science, 63(10), 2696-2706. 0009-2509 https://hdl.handle.net/10356/90917 http://hdl.handle.net/10220/4514 http://sfxna09.hosted.exlibrisgroup.com:3410/ntu/sfxlcl3?sid=metalib:ELSEVIER_SCIRUS&id=doi:&genre=&isbn=&issn=&date=2008&volume=63&issue=10&spage=2696&epage=2706&aulast=Rajendran&aufirst=%20A&auinit=&title=Chemical%20Engineering%20Science&atitle=Correction%20procedures%20for%20extra%2Dcolumn%20effects%20in%20dynamic%20column%20breakthrough%20experiments 10.1016/j.ces.2008.02.023 en Chemical engineering science Chemical Engineering Science. Copyright © 2009 Elsevier Ltd. All rights reserved. The Journal's web site is located at http://www.sciencedirect.com/science/journal/00092509 34 p. application/pdf
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic DRNTU::Engineering::Chemical engineering::Chemical plants
DRNTU::Engineering::Chemical engineering
spellingShingle DRNTU::Engineering::Chemical engineering::Chemical plants
DRNTU::Engineering::Chemical engineering
Rajendran, Arvind
Kariwala, Vinay
Farooq, Shamsuzzaman
Correction procedures for extra-column effects in dynamic column breakthrough experiments
description Dynamic column breakthrough experiments, routinely used to complement adsorption and diffusion studies at the particle scale, constitute an important step in the development and verification of dynamic models for simulation of adsorption processes. Various parts of the experimental set-up contribute to the retention time and band broadening of the experimental breakthrough curve. However, the effect of the extra-column contributions have to be properly accounted for in order to compare the experimental results with theoretical calculations. A common practice is to measure a blank response under the same flow rate, pressure and temperature conditions as the actual experiment by simply bypassing the adsorption column with a tube (or a connector) of negligible volume. This blank response is then subtracted point-by-point from the composite response (i.e., including the adsorption column) to account for extra-column contributions. The underlying assumption here is that blank and column responses are linearly additive, both in terms of mean residence time and band broadening. It is shown that this method of correction can, under certain operating conditions, lead to erroneous results. An alternative procedure based on linear regression is introduced and the improvements achieved by this method are illustrated using simulation examples.
author2 School of Chemical and Biomedical Engineering
author_facet School of Chemical and Biomedical Engineering
Rajendran, Arvind
Kariwala, Vinay
Farooq, Shamsuzzaman
format Article
author Rajendran, Arvind
Kariwala, Vinay
Farooq, Shamsuzzaman
author_sort Rajendran, Arvind
title Correction procedures for extra-column effects in dynamic column breakthrough experiments
title_short Correction procedures for extra-column effects in dynamic column breakthrough experiments
title_full Correction procedures for extra-column effects in dynamic column breakthrough experiments
title_fullStr Correction procedures for extra-column effects in dynamic column breakthrough experiments
title_full_unstemmed Correction procedures for extra-column effects in dynamic column breakthrough experiments
title_sort correction procedures for extra-column effects in dynamic column breakthrough experiments
publishDate 2009
url https://hdl.handle.net/10356/90917
http://hdl.handle.net/10220/4514
http://sfxna09.hosted.exlibrisgroup.com:3410/ntu/sfxlcl3?sid=metalib:ELSEVIER_SCIRUS&id=doi:&genre=&isbn=&issn=&date=2008&volume=63&issue=10&spage=2696&epage=2706&aulast=Rajendran&aufirst=%20A&auinit=&title=Chemical%20Engineering%20Science&atitle=Correction%20procedures%20for%20extra%2Dcolumn%20effects%20in%20dynamic%20column%20breakthrough%20experiments
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