4.5 Article

Selective oxidation of isobutane and isobutene to methacrolein over Te-Mo mixed oxide catalysts

Journal

CATALYSIS LETTERS
Volume 124, Issue 3-4, Pages 428-433

Publisher

SPRINGER
DOI: 10.1007/s10562-008-9496-3

Keywords

isobutane; isobutene; Te-Mo-O catalysts; selective oxidation; methacrolein

Funding

  1. National Basic Research Program of China [2004CB217804]
  2. National Natural Science Foundation of China [20673046]

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A series of Te-Mo-O catalysts were prepared by decomposing (NH(4))(4)TeMo(6)O(22) center dot 2H(2)O telluromolybdate under different conditions and tested for the oxidation of isobutane and isobutene. Characterization results (XRD, FTIR, TG, TPR, XPS, and BET) showed that their structure and properties depend on calcination conditions. Catalytic tests showed that molybdenum may be the key element for the activation of isobutane, whereas the selective oxidation of isobutene to methacrolein (MAL) might proceed mainly on the surface of the TeMo-containing crystalline phase. Thus, relatively high selectivities and yields of MAL and methacrylic acid (MAA) can be obtained over these specially designed catalysts.

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