Selective oxidation of isobutane to methacrolein over MoVTe mixed oxide supported on SBA-3 and SiO(2)
- 化学化工－已发表论文 
SBA-3 and SiO(2)-supported MoVTe mixed oxide catalysts have been prepared by impregnation and/or direct synthesis methods and tested for selective oxidation of isobutane to methacrolein (MAL). It was found that the supported catalysts showed much higher activity than the bulk MoVTe mixed oxide for the reaction. Among the supported catalysts, better isobutane conversion and MAL yield were achieved on the 3% MoV(0.8)Te(0.23)O(x)/SBA-3 catalyst prepared by the impregnation method. The catalysts were characterized with BET. XRD, Raman, H(2)-TPR, XPS and FT-IR of pyridine adsorption. The good performance of the SiO(2) and SBA-3 supported MoV(0.8)Te(0.23)O(x) catalysts was attributed to a combination of different properties: (i) formation of well dispersed active phases on large surface areas of SiO(2) and SBA-3 supports, which is beneficial for the isolation of active site and preventing the further oxidation of unstable reaction intermediate as well as product; (ii) improved activity for hydrogen abstraction of C-H bond of isobutane due to the formation of isolated pseudotetrahedral VO(4) species. (C) 2011 Elsevier B.V. All rights reserved.
出处FUEL PROCESSING TECHNOLOGY，2011,92（8）：1662-1669