Cambridge Open Engage home
What is Cambridge Open Engage?
How to Submit
Browse
About
News [opens in a new tab]

The Thermodynamic Way of Assessing Reversible Metal Hydride Volume Expansion: Getting a Grip on Metal Hydride Formation Overpotential

04 February 2021, Version 3
Working Paper
This content is a preprint and has not undergone peer review at the time of posting.

Abstract

The relative volume change of reversible metal hydrides upon hydrogenation is determined by means of the van’t Hoff reaction entropy and STP ideal gas parameters. This method allows insight into the requirements to metal hydride formation, outlined by example of Ti-NaAlH4. This work presents a timeless perspective on the sorbent phase thermodynamics of reversible chemical hydrogen storage systems.

Keywords

metal hydride
Reversible Hydrogen Storage Properties
molar volume results
sodium alanate
Thermodynamic Modeling
Thermodynamic tailoring
Equilibrium thermodynamics
Reversible Hydrogen Storage Capacity
volume expansion ratios
reaction comparison approaches
reversibility
hydrogen storage

Supplementary weblinks

Title
Description
Actions
Title
Description
Actions
View
Title
Description
Actions
View

Comments

Comments are not moderated before they are posted, but they can be removed by the site moderators if they are found to be in contravention of our Commenting Policy [opens in a new tab] - please read this policy before you post. Comments should be used for scholarly discussion of the content in question. You can find more information about how to use the commenting feature here [opens in a new tab] .
This site is protected by reCAPTCHA and the Google Privacy Policy [opens in a new tab] and Terms of Service [opens in a new tab] apply.

Version History

Feb 04, 2021 Version 3

Version Notes

V3: Some mental leaps and unclear parts were noticed and amended: sections 2 and 3 are more clearly outlined and from equation 8d onwards the line of argument has been sharpened (equation 13 in V2 omitted). A minor mistake with the Na3AlH6 crystal density calculation was noticed, leading to a 3.5 % deviation in the final result; it has been corrected and the result is now spot-on.

Metrics

3,064
755
0
Views
Downloads
Citations

License

CC logo
CC
BY logo
BY
NC logo
NC
ND logo
ND
The content is available under CC BY NC ND 4.0 [opens in a new tab]

DOI

10.26434/chemrxiv.10316819.v3
D O I: 10.26434/chemrxiv.10316819.v3 [opens in a new tab]

Funding

European Space Agency grant 4000105330/12/NL/CLP

Author’s competing interest statement

There are no conflicts to declare.

Share