Toward a reliable computational description of hydrocarbon activation in zeolites : a study of cracking, dehydrogenation, and H/D Exchange of alkanes in H-ZSM-5. Metadata

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Title

  • Main Title Toward a reliable computational description of hydrocarbon activation in zeolites : a study of cracking, dehydrogenation, and H/D Exchange of alkanes in H-ZSM-5.

Creator

  • Author: Zygmunt, S. A.
    Creator Type: Personal
  • Author: Bootz, B. L.
    Creator Type: Personal
  • Author: Miller, A. W.
    Creator Type: Personal
  • Author: Curtiss, L. A.
    Creator Type: Personal
  • Author: Iton, L. E.
    Creator Type: Personal

Contributor

  • Sponsor: United States. Department of Energy.
    Contributor Type: Organization
    Contributor Info: US Department of Energy (United States)

Publisher

  • Name: Argonne National Laboratory
    Place of Publication: Illinois
    Additional Info: Argonne National Lab., IL (United States)

Date

  • Creation: 2000-11-01

Language

  • English

Description

  • Content Description: During the past decade, quantum-chemical calculations have been used to model hydrocarbon reactions in zeolite acid catalysts. In the interest of computational feasibility, the zeolite has often been represented by a very small cluster model, at times including only one tetrahedrally-coordinated atom (a 1T cluster). The results of such calculations have given important qualitative insights such as possible reaction pathways and transition state geometries, but the calculated activation energies for hydrocarbon reactions have usually been 50 percent or more higher than experimental values. In our recent work we developed a methodology of quantum-chemical techniques and corrections that allowed us to calculate a quantitatively accurate activation energy for protolytic cracking of ethane in H-ZSM-5 [1]. In order to test the limits of our computational method, we have carried out a study of protolytic cracking, dehydrogenation, and H/D exchange of the n-alkanes ethane, propane, and butane using a cluster model of H-ZSM-5. Our goal is to study the dependence of the activation energy on the alkane chain length in these reactions and to determine whether this method can produce results in quantitative agreement with available experimental results [2-5].
  • Physical Description: 4 p.

Subject

  • Keyword: Isotopic Exchange
  • STI Subject Categories: 02 Petroleum
  • Keyword: Zeolites
  • Keyword: Propane
  • STI Subject Categories: 37 Inorganic, Organic, Physical And Analytical Chemistry
  • Keyword: Molecular Structure
  • Keyword: Catalysts
  • Keyword: Dehydrogenation
  • Keyword: Ethane
  • Keyword: Butane
  • Keyword: Cracking
  • Keyword: Catalysis
  • Keyword: Activation Energy

Source

  • Conference: 17th North American Catalysis Meeting, Toronto, Ontario (CA), 06/03/2001--06/08/2001

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.: ANL/MSD/CP-103177
  • Grant Number: W-31-109-ENG-38
  • Office of Scientific & Technical Information Report Number: 768592
  • Archival Resource Key: ark:/67531/metadc718149

Note

  • Display Note: OSTI as DE00768592
  • Display Note: Medium: P; Size: 4 pages