Kinetic studies of the reaction of atomic sulfur with acetylene Metadata

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Title

  • Main Title Kinetic studies of the reaction of atomic sulfur with acetylene

Creator

  • Author: Ayling, Sean
    Creator Type: Personal
    Creator Info: University of North Texas
  • Author: Gao, Yide
    Creator Type: Personal
    Creator Info: University of North Texas
  • Author: Marshall, Paul
    Creator Type: Personal
    Creator Info: University of North Texas

Publisher

  • Name: Elsevier Science Ltd.
    Place of Publication: [New York, New York]

Date

  • Creation: 2014-06-25

Language

  • English

Description

  • Content Description: Article on kinetic studies of the reaction of atomic sulfur with acetylene.
  • Physical Description: 8 p.

Subject

  • Keyword: acetylene
  • Keyword: sulfur
  • Keyword: kinetics
  • Keyword: RRKM theory

Source

  • Journal: Proceedings of the Combustion Institute, 2014, New York: Elsevier Limited Ltd., pp. 215-222

Citation

  • Publication Title: Proceedings of the Combustion Institute
  • Volume: 35
  • Issue: 1
  • Page Start: 215
  • Page End: 222
  • Pages: 8
  • Peer Reviewed: True

Collection

  • Name: UNT Scholarly Works
    Code: UNTSW

Institution

  • Name: UNT College of Arts and Sciences
    Code: UNTCAS

Rights

  • Rights Access: public

Resource Type

  • Article

Format

  • Text

Identifier

  • DOI: 10.1016/j.proci.2014.05.079
  • Archival Resource Key: ark:/67531/metadc501395

Degree

  • Academic Department: Chemistry

Note

  • Display Note: Abstract: The rate constant for reaction of sulfur atoms with acetylene was measured. Laser flash photolysis of CS2 precursor was employed to generate ground-state S(3P) atoms, which were monitored with time-resolved resonance fluorescence as they reacted with C2H2 in a large excess of Ar bath gas. Temperatures from 295 to 1015 and pressures from 10 to 500 mbar were investigated. A pressure-dependence was observed at all temperatures, revealing that adduct formation is the dominant reaction channel. The necessary stability suggests H2CCS or possibly HCCSH are the products at high temperatures, so that the reaction is spin-forbidden. The fall-off curves may be represented with a broadening factor Fcent = 0.6, and low and high-pressure limiting rate constants of k0 = 1.0 × 10−18 (T/K)−3.55 exp(−1990 K/T) cm6 molecule−2 s−1 and k∞ = 2.1 × 10−11 exp(−11.2 kJ mol−1/RT) cm3 molecule−1 s−1, respectively. An entrance barrier to recombination of about 10 kJ mol−1 is proposed to arise where the singlet and triplet potential energy curves cross.
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