Novel low energy hydrogen–deuterium isotope breakthrough separation using a trapdoor zeolite

[Display omitted] •Packed beds of “trapdoor zeolite” result in breakthrough separation of H2 isotopes.•Breakthrough separation of 1H and 2H occurs at ∼293K.•Interactions with trapdoor cations result in differences in breakthrough times. Cs-chabazite, a type of zeolite with caesium counter-cations, p...

Full description

Saved in:

Bibliographic Details
Published in:	Chemical engineering journal (Lausanne, Switzerland : 1996) Vol. 288; pp. 161 - 168
Main Authors:	Physick, Andrew J.W., Wales, Dominic J., Owens, Simon H.R., Shang, Jin, Webley, Paul A., Mays, Timothy J., Ting, Valeska P.
Format:	Journal Article
Language:	English
Published:	Elsevier B.V 15-03-2016
Subjects:	Breakthrough separation Deuterium Hydrogen Isotope separation Trapdoor zeolite Deuterium Isotope separation Trapdoor zeolite Hydrogen Breakthrough separation
Online Access:	Get full text
Tags:	Add Tag No Tags, Be the first to tag this record!

Description
Summary:	[Display omitted] •Packed beds of “trapdoor zeolite” result in breakthrough separation of H2 isotopes.•Breakthrough separation of 1H and 2H occurs at ∼293K.•Interactions with trapdoor cations result in differences in breakthrough times. Cs-chabazite, a type of zeolite with caesium counter-cations, possesses interesting gas separation properties due to a highly selective molecular “trapdoor” effect. Herein the use of this material for H2/D2 isotope separation is demonstrated. Isotope separation was achieved using breakthrough separation with a single pass through a packed bed at moderate temperatures (293K) and pressures (0.17MPa) when one species was in a sufficiently low concentration. The breakthrough separation curves were successfully modelled using the Thomas kinetic breakthrough model and the Yoon and Nelson kinetic breakthrough model, where working transferable kinetic rate constants were developed. Use of this material for hydrogen isotope separation would significantly lower the total energy demand compared with current hydrogen isotope separation techniques such as cryogenic distillation and is applicable to separating out low concentrations of D2 (0.0156%) present in standard grade H2.
Bibliography:	ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23
ISSN:	1385-8947 1873-3212
DOI:	10.1016/j.cej.2015.11.040