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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
Xiang Li
Guangqing Zhang
Kai Tang
Oleg Ostrovski
og
Ragnar Tronstad
Tidsskrift
Tidsskrift
Metallurgical and Materials Transactions B
ISSN 1073-5615
e-ISSN 1543-1916
NVI-nivå 2
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Om resultatet
Om resultatet
Vitenskapelig artikkel
Publiseringsår: 2015
Publisert online: 2015
Trykket: 2015
Volum: 46
Hefte: 5
Sider: 2384 - 2393
Lenker
Lenker
original online (doi)
https://doi.org/10.1007/s11663-015-0407-x
Importkilder
Importkilder
Scopus-ID: 2-s2.0-84936862579
Scopus-ID: 2-s2.0-84942192847
Beskrivelse
Beskrivelse
Engelsk
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.
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Bidragsytere
Bidragsytere
Xiang Li
Forfatter
ved University of Wollongong
Guangqing Zhang
Forfatter
ved University of Wollongong
Kai Tang
Forfatter
ved Metallproduksjon og prosessering ved SINTEF AS
Oleg Ostrovski
Forfatter
ved University of New South Wales
Ragnar Tronstad
Forfatter
ved Elkem AS
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