Development of a high-pressure microbalance for hydrogen storage materials

Publication: Research - peer-reviewConference article – Annual report year: 2007

View graph of relations

Pressure-composition isotherms (PCI's) help to determine thermodynamic properties related to hydrogen uptake of materials. PCI's are normally obtained volumetrically with a Sieverts type apparatus or gravimetrically with a microbalance. A potential problem with the gravimetric technique is that the sample is momentarily exposed to air when transferring it to the system often causing unwanted changes such as oxidation and reaction with moisture in the air. In this study, a high-pressure microbalance was built from scratch inside a glove box with inert atmosphere. The system consists of an electromagnetic microbalance, pressure resistant casing for up to 100 bar hydrogen, a flow system for hydrogen and inert gas, heating elements for temperature control, and software for controlling the system. Thermal convection effects are observed and dampened by heating on both the sample and a counterweight. The precision of the mass measurements for a 1 g sample was +/- 5 mu g, and this range proved to be the same independent of pressure and temperature.
Original languageEnglish
JournalJournal of Alloys and Compounds
Publication date31 Oct 2007
Volume446
IssueSpecial Issue
Pages703-706
ISSN0925-8388
DOIs
StatePublished

Conference

ConferenceInternational Symposium on Metal-Hydrogen Systems : Fundamentals and Applications
CityLahaina, Maui, Hawaii
Period01/01/06 → …
CitationsWeb of Science® Times Cited: 3

Keywords

  • gas-solid reactions, high-pressure, metal hydrides, hydrogen absorbing materials, thermodynamic properties
Download as:
Download as PDF
Select render style:
APAAuthorCBEHarvardMLAStandardVancouverShortLong
PDF
Download as HTML
Select render style:
APAAuthorCBEHarvardMLAStandardVancouverShortLong
HTML
Download as Word
Select render style:
APAAuthorCBEHarvardMLAStandardVancouverShortLong
Word

ID: 4350803