Selective and high catalytic activity of CsnH4-nPMo11VO40 (n≥3) for oxidation of ethanol

Dae Won Lee, Jin Hyuk Lee, Jae Chun Hyun, Kwan Young Lee

Research output: Contribution to journalArticlepeer-review

24 Citations (Scopus)

Abstract

Oxidation of ethanol has been performed over CsnH4-nPMo11VO40 (0 ≤ n ≤ 4) catalysts in order to investigate the oxidation property of acidic Cs salts of molybdovanadophosphoric acid. A flow-type packed bed reactor was used for the reaction. Acetaldehyde was produced by oxidation catalysis, while ethylene and diethyl ether were produced by acid catalysis. The yields of these products were strongly dependent on the amount of Cs contained. Acid catalysis was dominant in n < 3, especially 2.5 < n < 3; this could be explained by high surface acidity caused by high surface area and uniformity. On the other hand, oxidation catalysis was remarkably improved for n ≥ 3. For these catalysts, acetaldehyde was produced selectively and the yield increased up to 38%, which was three times higher than that of n < 3. Several characteristics studies using XRD, ESCA, ICP, solid-state NMR, and CO2 adsorption have showed that the high oxidation activity for n ≥ 3 was attributable to the increased surface basicity caused by surface Cs species being not incorporated into the bulk structure.

Original languageEnglish
Pages (from-to)123-127
Number of pages5
JournalApplied Catalysis A: General
Volume194
DOIs
Publication statusPublished - 2000 Mar 13

ASJC Scopus subject areas

  • Catalysis
  • Process Chemistry and Technology

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