Optimization of hydrogen enrichment via palladium membrane in vacuum environments using Taguchi method and normalized regression analysis

Chen, WH; Chen, KH; Chein, RY; Ong, HC; Arunachalam, KD

Optimization of hydrogen enrichment via palladium membrane in vacuum environments using Taguchi method and normalized regression analysis

Chen, WH Chen, KH Chein, RY Ong, HC Arunachalam, KD

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Publisher:: Elsevier
Publication Type:: Journal Article
Citation:: International Journal of Hydrogen Energy, 2022, 47, (100), pp. 42280-42292
Issue Date:: 2022-12-30

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Field	Value	Language
dc.contributor.author	Chen, WH
dc.contributor.author	Chen, KH
dc.contributor.author	Chein, RY
dc.contributor.author	Ong, HC
dc.contributor.author	Arunachalam, KD
dc.date.accessioned	2023-04-21T04:05:18Z
dc.date.available	2023-04-21T04:05:18Z
dc.date.issued	2022-12-30
dc.identifier.citation	International Journal of Hydrogen Energy, 2022, 47, (100), pp. 42280-42292
dc.identifier.issn	0360-3199
dc.identifier.uri	http://hdl.handle.net/10453/170061
dc.description.abstract	In this study, the separation of hydrogen from gas mixtures using a palladium membrane coupled with a vacuum environment on the permeate side was studied experimentally. The gas mixtures composed of H2, N2, and CO2 were used as the feed. Hydrogen permeation fluxes were measured with membrane operating temperature in the range of 320–380 °C, pressures on the retentate side in the range of 2–5 atm, and vacuum pressures on the permeate side in the range of 15–51 kPa. The Taguchi method was used to design the operating conditions for the experiments based on an orthogonal array. Using the measured H2 permeation fluxes from the Taguchi approach, the stepwise regression analysis was also employed for establishing the prediction models of H2 permeation flux, followed by the analysis of variance (ANOVA) to identify the significance and suitability of operating conditions. Based on both the Taguchi approach and ANOVA, the H2 permeation flux was mostly affected by the gas mixture composition, followed by the retentate side pressure, the vacuum degree, and the membrane temperature. The predicted optimal operating conditions were the gas mixture with 75% H2 and 25% N2, the membrane temperature of 320 °C, the retentate side pressure of 5 atm, and the vacuum degree of 51 kPa. Under these conditions, the H2 permeation flux was 0.185 mol s−1 m−2. A second-order normalized regression model with a relative error of less than 7% was obtained based on the measured H2 permeation flux.
dc.language	en
dc.publisher	Elsevier
dc.relation.ispartof	International Journal of Hydrogen Energy
dc.relation.isbasedon	10.1016/j.ijhydene.2022.01.060
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject	03 Chemical Sciences, 09 Engineering
dc.subject.classification	Energy
dc.title	Optimization of hydrogen enrichment via palladium membrane in vacuum environments using Taguchi method and normalized regression analysis
dc.type	Journal Article
utslib.citation.volume	47
utslib.for	03 Chemical Sciences
utslib.for	09 Engineering
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology/School of Civil and Environmental Engineering
utslib.copyright.status	closed_access	*
dc.date.updated	2023-04-21T04:05:16Z
pubs.issue	100
pubs.publication-status	Published
pubs.volume	47
utslib.citation.issue	100

Abstract:

In this study, the separation of hydrogen from gas mixtures using a palladium membrane coupled with a vacuum environment on the permeate side was studied experimentally. The gas mixtures composed of H2, N2, and CO2 were used as the feed. Hydrogen permeation fluxes were measured with membrane operating temperature in the range of 320–380 °C, pressures on the retentate side in the range of 2–5 atm, and vacuum pressures on the permeate side in the range of 15–51 kPa. The Taguchi method was used to design the operating conditions for the experiments based on an orthogonal array. Using the measured H2 permeation fluxes from the Taguchi approach, the stepwise regression analysis was also employed for establishing the prediction models of H2 permeation flux, followed by the analysis of variance (ANOVA) to identify the significance and suitability of operating conditions. Based on both the Taguchi approach and ANOVA, the H2 permeation flux was mostly affected by the gas mixture composition, followed by the retentate side pressure, the vacuum degree, and the membrane temperature. The predicted optimal operating conditions were the gas mixture with 75% H2 and 25% N2, the membrane temperature of 320 °C, the retentate side pressure of 5 atm, and the vacuum degree of 51 kPa. Under these conditions, the H2 permeation flux was 0.185 mol s−1 m−2. A second-order normalized regression model with a relative error of less than 7% was obtained based on the measured H2 permeation flux.

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http://hdl.handle.net/10453/170061