Pb-substituted hydroxyapatite catalysts prepared by coprecipitation method for oxidative coupling of methane

Kwan Young Lee, Yoon Chull Han, Dong Jin Suh, Tae J. Park

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

Pb-substituted hydroxyapatites (Ca(10-x)Pbx(PO4)6(OH)2, x=0-10) prepared by coprecipitation method were studied as catalysts for oxidative coupling of methane using gas flow reactor in the temperature range of 675 to 800°C. They showed much higher activity for the production of C2 compounds than those of unsubstituted hydroxyapatites. Especially, Ca9.5Pb0.5(PO4)6(OH)2 showed the highest activity among them, which revealed maximum C2 yield of about 22%. As compared to the catalysts prepared by ion-exchange method, these catalysts had much higher activity and better thermal stability. Such high activity and stability of the catalysts could be confirmed by XPS, XRD, ICP, etc. to be resulted from the optimum amount of Pb substitution, uniformity of structure, and the maintenance of their own structure during the reaction.

Original languageEnglish
Pages (from-to)385-390
Number of pages6
JournalStudies in Surface Science and Catalysis
Volume119
Publication statusPublished - 1998 Dec 1

Fingerprint

Methane
Durapatite
Coprecipitation
Hydroxyapatite
Hydroxyapatites
methane
catalysts
Catalysts
maintenance
gas flow
Flow of gases
Ion exchange
Thermodynamic stability
Substitution reactions
thermal stability
X ray photoelectron spectroscopy
reactors
substitutes
ions
Temperature

ASJC Scopus subject areas

  • Catalysis
  • Physical and Theoretical Chemistry

Cite this

Pb-substituted hydroxyapatite catalysts prepared by coprecipitation method for oxidative coupling of methane. / Lee, Kwan Young; Han, Yoon Chull; Suh, Dong Jin; Park, Tae J.

In: Studies in Surface Science and Catalysis, Vol. 119, 01.12.1998, p. 385-390.

Research output: Contribution to journalArticle

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