Effect of preparation method and particle size on LaMnO3 performance in butane oxidation

Zhi Jun Sui, Leonid Vradman, Ieudit Reizner, Miron V. Landau, Moti Herskowitz

Research output: Contribution to journalArticlepeer-review

31 Scopus citations

Abstract

LaMnO3 with different crystal domain sizes and surface areas were prepared by citrate and sol-gel combustion methods and tested as catalysts for butane total oxidation reaction. The catalysts were characterized by N 2 physisorption, XRD and SEM. LaMnO3 with crystal domain sizes in the range of 30-90 nm were detected by XRD characterization when high calcination temperature, at least 500 °C for sol-gel combustion method and 700 °C for citrate method, was required to prepare pure nanocrystalline phase. Although LaMnO3 prepared by these two methods had similar crystal domain sizes, BET surface areas of samples by citrate method were significantly larger than that of samples prepared by combustion method. The difference of surface area lies in the morphology differences between the two series of samples (SEM micrographs) generated by strong sintering of samples prepared by combustion method. The catalytic activity of LaMnO3 in butane total oxidation increased with increasing surface area being higher for materials prepared by citrate method. Thus, citrate method showed significant advantages over combustion method in preparation of perovskite catalysts.

Original languageEnglish
Pages (from-to)1437-1441
Number of pages5
JournalCatalysis Communications
Volume12
Issue number15
DOIs
StatePublished - 15 Sep 2011

Keywords

  • Butane oxidation
  • Citrate method
  • LaMnO perovskite
  • Sol-gel combustion method

ASJC Scopus subject areas

  • Catalysis
  • Chemistry (all)
  • Process Chemistry and Technology

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