Modeling of temporal behavior of isotopic exchange between gaseous hydrogen and palladium hydride power

Thumbnail image of item number 1 in: 'Modeling of temporal behavior of isotopic exchange between gaseous hydrogen and palladium hydride power'.
Thumbnail image of item number 2 in: 'Modeling of temporal behavior of isotopic exchange between gaseous hydrogen and palladium hydride power'.
Thumbnail image of item number 3 in: 'Modeling of temporal behavior of isotopic exchange between gaseous hydrogen and palladium hydride power'.
Thumbnail image of item number 4 in: 'Modeling of temporal behavior of isotopic exchange between gaseous hydrogen and palladium hydride power'.
Showing 1-4 of 26 pages in this report.

PDF Version Also Available for Download.

Description

A parametric rate-equation model is described which depicts the time dependent behavior of the isotopic exchange process occurring between the solid and gas phases in gaseous hydrogen (deuterium) flows through packed-powder palladium deuteride (hydride) beds. The exchange mechanism is assumed to be rate-limited by processes taking place on the surface of the powder. The fundamental kinetic parameter of the model is the isotopic exchange probability, p, which is the probability that an isotopic exchange event occurs during a collision of a gas phase atom with the surface. Isotope effects between the gas and solid phases are explicitly included in terms … continued below

Physical Description

24 pages

Creation Information

Melius, C F & Foltz, G W January 1, 1987.

Context

This report is part of the collection entitled: Office of Scientific & Technical Information Technical Reports and was provided by the UNT Libraries Government Documents Department to the UNT Digital Library, a digital repository hosted by the UNT Libraries. It has been viewed 42 times, with 7 in the last month. More information about this report can be viewed below.

Who

People and organizations associated with either the creation of this report or its content.

Authors

Publisher

Provided By

UNT Libraries Government Documents Department

Serving as both a federal and a state depository library, the UNT Libraries Government Documents Department maintains millions of items in a variety of formats. The department is a member of the FDLP Content Partnerships Program and an Affiliated Archive of the National Archives.

About | Browse this Partner

Contact Us

Corrections Questions

What

Descriptive information to help identify this report. Follow the links below to find similar items on the Digital Library.

Description

A parametric rate-equation model is described which depicts the time dependent behavior of the isotopic exchange process occurring between the solid and gas phases in gaseous hydrogen (deuterium) flows through packed-powder palladium deuteride (hydride) beds. The exchange mechanism is assumed to be rate-limited by processes taking place on the surface of the powder. The fundamental kinetic parameter of the model is the isotopic exchange probability, p, which is the probability that an isotopic exchange event occurs during a collision of a gas phase atom with the surface. Isotope effects between the gas and solid phases are explicitly included in terms of the isotope separation factor, ..cap alpha... Results of the model are compared with recent experimental measurements of isotope exchange in the ..beta..-phase hydrogen/palladium system and, using a literature value of ..cap alpha.. = 2.4, a good description of the experimental data is obtained for p approx. 10/sup -7/. In view of the importance of the isotope effects in the hydrogen/palladium system and the range of ..cap alpha.. values reported for the ..beta..-phase in the literature, the sensitivity of the model results to a variation in the value of ..cap alpha.. is examined.

Physical Description

24 pages

Notes

NTIS, PC A02/MF A01; 1.

Source

  • Other Information: Portions of this document are illegible in microfiche products. Original copy available until stock is exhausted

Language

Item Type

Identifier

Unique identifying numbers for this report in the Digital Library or other systems.

Collections

This report is part of the following collection of related materials.

Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

About | Browse this Collection

What responsibilities do I have when using this report?

Digital Files

When

Dates and time periods associated with this report.

Creation Date

  • January 1, 1987

Added to The UNT Digital Library

  • July 3, 2018, 8:14 a.m.

Description Last Updated

  • Jan. 20, 2021, 3:11 p.m.

Usage Statistics

When was this report last used?

Yesterday: 0
Past 30 days: 7
Total Uses: 42
More Statistics

Interact With This Report

Here are some suggestions for what to do next.

Start Reading

Thumbnail image of item number 1 in: 'Modeling of temporal behavior of isotopic exchange between gaseous hydrogen and palladium hydride power'.
Thumbnail image of item number 2 in: 'Modeling of temporal behavior of isotopic exchange between gaseous hydrogen and palladium hydride power'.
Thumbnail image of item number 3 in: 'Modeling of temporal behavior of isotopic exchange between gaseous hydrogen and palladium hydride power'.
Thumbnail image of item number 4 in: 'Modeling of temporal behavior of isotopic exchange between gaseous hydrogen and palladium hydride power'.

PDF Version Also Available for Download.

Citations, Rights, Re-Use

International Image Interoperability Framework

IIF Logo

We support the IIIF Presentation API

Links for Robots

Helpful links in machine-readable formats.

Archival Resource Key (ARK)

International Image Interoperability Framework (IIIF)

Metadata Formats

Images

URLs

Stats

Melius, C F & Foltz, G W. Modeling of temporal behavior of isotopic exchange between gaseous hydrogen and palladium hydride power, report, January 1, 1987; Livermore, California. (https://digital.library.unt.edu/ark:/67531/metadc1190496/: accessed July 16, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.

Back to Top of Screen