The novel and highly selective fumed silica-supported VPO for partial oxidation of n-butane to maleic anhydride

C. Y. Xiao, X. Chen, Z. Y. Wang, W. J. Ji*, Y. Chen, Chak Tong AU

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review

24 Citations (Scopus)

Abstract

By applying fumed SiO2 as support material, introducing the additive of polyethylene glycol (PEG) in the preparation medium and a deposition-precipitation method based on organic phase, we prepared the novel fumed SiO2-supported VPO catalysts. The catalysts are the most selective in comparison to the various supported VPO counterparts for the partial oxidation of n-butane to maleic anhydride. At 653K the derived samples showed butane conversion of 33-40% and MA selectivity of 87-65mol%. The catalysts not only showed good performance at lower reaction temperatures, but also maintained higher MA selectivity at different loadings. In addition to the unique nature of fumed SiO2, the highly uniform dispersion of VPO component and the involved VPO-support interaction, co-existence of predominant (VO)2P2O7 phase and minor VOPO4 may also be beneficial to the good performance on the unique fumed SiO 2-based catalysts. In addition, broadening of the (200) diffraction line of (VO)2P2O7 phase is an indication of structural disorder, one considered to be relevant to MA formation.

Original languageEnglish
Pages (from-to)223-228
Number of pages6
JournalCatalysis Today
Volume93-95
DOIs
Publication statusPublished - 1 Sep 2004
EventSelections from the Presentations of the 3rd Asia-Pacific Congress - Dalian, China
Duration: 12 Oct 200312 Oct 2003

Scopus Subject Areas

  • Catalysis
  • Chemistry(all)

User-Defined Keywords

  • Fumed SiO
  • Maleic anhydride
  • n-Butane
  • Partial oxidation
  • Supported VPO

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