Cristin-resultat-ID: 1253761
Sist endret: 30. oktober 2017, 11:10
NVI-rapporteringsår: 2015
Resultat
Vitenskapelig artikkel
2015

Carbothermal reduction of quartz in methane–hydrogen–argon gas mixture

Bidragsytere:
  • Xiang Li
  • Guangqing Zhang
  • Kai Tang
  • Oleg Ostrovski og
  • Ragnar Tronstad

Tidsskrift

Metallurgical and Materials Transactions B
ISSN 1073-5615
e-ISSN 1543-1916
NVI-nivå 2

Om resultatet

Vitenskapelig artikkel
Publiseringsår: 2015
Publisert online: 2015
Trykket: 2015
Volum: 46
Hefte: 5
Sider: 2384 - 2393

Importkilder

Scopus-ID: 2-s2.0-84936862579
Scopus-ID: 2-s2.0-84942192847

Beskrivelse Beskrivelse

Tittel

Carbothermal reduction of quartz in methane–hydrogen–argon gas mixture

Sammendrag

Synthesis of silicon carbide (SiC) by carbothermal reduction of quartz in a CH4–H2–Ar gas mixture was investigated in a laboratory fixed-bed reactor in the temperature range of 1573 K to 1823 K (1300 °C to 1550 °C). The reduction process was monitored by an infrared gas analyser, and the reduction products were characterized by LECO, XRD, and SEM. A mixture of quartz–graphite powders with C/SiO2 molar ratio of 2 was pressed into pellets and used for reduction experiments. The reduction was completed within 2 hours under the conditions of temperature at or above 1773 K (1500 °C), methane content of 0.5 to 2 vol pct, and hydrogen content ≥70 vol pct. Methane partially substituted carbon as a reductant in the SiC synthesis and enhanced the reduction kinetics significantly. An increase in the methane content above 2 vol pct caused excessive carbon deposition which had a detrimental effect on the reaction rate. Hydrogen content in the gas mixture above 70 vol pct effectively suppressed the cracking of methane.

Bidragsytere

Xiang Li

  • Tilknyttet:
    Forfatter
    ved University of Wollongong

Guangqing Zhang

  • Tilknyttet:
    Forfatter
    ved University of Wollongong

Kai Tang

  • Tilknyttet:
    Forfatter
    ved Metallproduksjon og prosessering ved SINTEF AS

Oleg Ostrovski

  • Tilknyttet:
    Forfatter
    ved University of New South Wales

Ragnar Tronstad

  • Tilknyttet:
    Forfatter
    ved Elkem AS
1 - 5 av 5