Multiphase imaging of gas flow in a nanoporous material usingremote detection NMR Metadata

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Title

  • Main Title Multiphase imaging of gas flow in a nanoporous material usingremote detection NMR

Creator

  • Author: Harel, Elad
    Creator Type: Personal
  • Author: Granwehr, Josef
    Creator Type: Personal
  • Author: Seeley, Juliette A.
    Creator Type: Personal
  • Author: Pines, Alex
    Creator Type: Personal

Contributor

  • Sponsor: United States. Department of Energy. Division of Materials Sciences and Engineering.
    Contributor Type: Organization
    Contributor Info: USDOE Director. Office of Science. Office of Basic Energy Sciences. Materials Science and Engineering Division
  • Sponsor: United States. Department of Homeland Security.
    Contributor Type: Organization
    Contributor Info: Fellowship

Publisher

  • Name: Lawrence Berkeley National Laboratory
    Place of Publication: Berkeley, California
    Additional Info: Ernest Orlando Lawrence Berkeley National Laboratory, Berkeley, CA (United States)

Date

  • Creation: 2005-10-03

Language

  • English

Description

  • Content Description: Pore structure and connectivity determine how microstructured materials perform in applications such as catalysis, fluid storage and transport, filtering, or as reactors. We report a model study on silica aerogel using a recently introduced time-of-flight (TOF) magnetic resonance imaging technique to characterize the flow field and elucidate the effects of heterogeneities in the pore structure on gas flow and dispersion with Xe-129 as the gas-phase sensor. The observed chemical shift allows the separate visualization of unrestricted xenon and xenon confined in the pores of the aerogel. The asymmetrical nature of the dispersion pattern alludes to the existence of a stationary and a flow regime in the aerogel. An exchange time constant is determined to characterize the gas transfer between them. As a general methodology, this technique provides new insights into the dynamics of flow in porous media where multiple phases or chemical species may be present.

Subject

  • Keyword: Chemical Shift
  • Keyword: Xenon Nmr Mri Remote Detection Aerogel Flow
  • Keyword: Nmr Mri Remote Detection Aerogel Flow
  • STI Subject Categories: 36 Materials Science
  • Keyword: Pore Structure
  • Keyword: Magnetic Resonance
  • Keyword: Detection
  • Keyword: Gas Flow
  • Keyword: Catalysis
  • Keyword: Silica
  • Keyword: Transport
  • Keyword: Storage

Source

  • Journal Name: Nature Materials; Journal Volume: 5; Journal Issue: 4; Related Information: Journal Publication Date: 04/2006

Collection

  • Name: Office of Scientific & Technical Information Technical Reports
    Code: OSTI

Institution

  • Name: UNT Libraries Government Documents Department
    Code: UNTGD

Resource Type

  • Article

Format

  • Text

Identifier

  • Report No.: LBNL--58951
  • Grant Number: DE-AC02-05CH11231
  • Office of Scientific & Technical Information Report Number: 881740
  • Archival Resource Key: ark:/67531/metadc873475
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