Cristin-resultat-ID: 1092645
Sist endret: 4. november 2014, 21:35
NVI-rapporteringsår: 2013
Resultat
Vitenskapelig artikkel
2014

Acetylene pyrolysis in tubular reactor

Bidragsytere:
  • Odd A. Rokstad
  • Odd Asbjørn Lindvåg og
  • Anders Holmen

Tidsskrift

International Journal of Chemical Kinetics
ISSN 0538-8066
e-ISSN 1097-4601
NVI-nivå 1

Om resultatet

Vitenskapelig artikkel
Publiseringsår: 2014
Publisert online: 2013
Trykket: 2014
Volum: 46
Hefte: 2
Sider: 104 - 115

Importkilder

Scopus-ID: 2-s2.0-84890786515
Isi-ID: 000328635400002

Beskrivelse Beskrivelse

Tittel

Acetylene pyrolysis in tubular reactor

Sammendrag

Pyrolysis of acetylene was investigated in a tubular reactor of graphite with an internal lining of alumina. The temperature range was 850–1650 °C, and the pressure was about 0.133 bar (100 Torr). Pure acetylene and acetylene diluted with argon or hydrogen were used as feed. Carbon and hydrogen are the main products from acetylene pyrolysis particularly at higher conversion. At lower conversion of acetylene, other gas products were formed; the amount of these depended on temperature, dilution, and conversion. Benzene and vinyl acetylene are the main gas products from pyrolysis of pure acetylene below 1000 °C and at low conversion. Diacetylene increases with increasing temperature. Dilution with hydrogen changes the composition of the gas product, decreases the selectivity of vinyl acetylene and benzene, and increases the formation of methane and ethylene. Gas-phase equilibrium may be approached between some components. The conversion of acetylene with argon dilution and low conversion was found to be of second order. Pyrolysis of pure acetylene at lower temperature and low conversion gave the rate constant k = 3.1 × 109 · exp(−34.8/RT) L mol−1 s−1 with an activation energy of 34.8 kcal mol−1. The initial reaction at 864 °C is a molecular formation of vinyl acetylene. The initial activation of acetylene in gas phase seems to be rate determining and of second order in acetylene. Decomposition of acetylene can take place both homogeneously and heterogeneously. Above a critical partial pressure of acetylene, the decomposition is apparently explosive with instant plugging of the reactor with carbon.

Bidragsytere

Odd Arne Rokstad

Bidragsyterens navn vises på dette resultatet som Odd A. Rokstad
  • Tilknyttet:
    Forfatter
    ved Institutt for kjemisk prosessteknologi ved Norges teknisk-naturvitenskapelige universitet
  • Tilknyttet:
    Forfatter
    ved SINTEF Industri ved SINTEF AS

Odd Asbjørn Lindvåg

  • Tilknyttet:
    Forfatter
    ved Prosessteknologi ved SINTEF AS

Anders Holmen

  • Tilknyttet:
    Forfatter
    ved Institutt for kjemisk prosessteknologi ved Norges teknisk-naturvitenskapelige universitet
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