کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
43847 45991 2006 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Tungsten-containing MCF silica as active and recyclable catalysts for liquid-phase oxidation of 1,3-butanediol to 4-hydroxy-2-butanone
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی کاتالیزور
پیش نمایش صفحه اول مقاله
Tungsten-containing MCF silica as active and recyclable catalysts for liquid-phase oxidation of 1,3-butanediol to 4-hydroxy-2-butanone
چکیده انگلیسی

W-containing mesocellular silica foams (MCF) having a Si/W (molar) ratio of 10–40 were synthesized and characterized by means of N2 adsorption, SAXS, XRD, TEM, DRIFTS, DR UV–vis and Raman spectroscopy. The results show that tungsten was well incorporated inside the MCF material and the nature of WOx species closely depends on the tungsten content. At low tungsten content (Si/W ≥ 20), the characteristic mesocellular structure of the MCF material was well maintained while at higher tungsten content (Si/W ∼ 10) a significant degradation of the mesocellular arrangement of MCF pores was observed. The selective liquid-phase oxidation of 1,3-butanediol (1,3-BDO) to 4-hydroxy-2-butanone (HB) over the W-MCF material with various Si/W ratios was investigated. Under optimized reaction conditions, the W-MCF catalyst showed a superior catalytic performance in the selective oxidation of 1,3-BDO as compared to other W-containing materials such as WO3/MCF and W-SBA-15. Moreover, a very stable catalytic activity as a function of cycling test was observed for the W-MCF catalyst.

W-containing mesocellular silica foams (MCF) having a Si/W (molar) ratio of 10–40 were synthesized and investigated with regard to their performance in the selective liquid-phase oxidation of 1,3-butanediol (1,3-BDO) to 4-hydroxy-2-butanone (HB). A very stable catalytic activity as a function of cycling test was observed for the as-synthesized W-MCF catalysts. Figure optionsDownload as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Catalysis A: General - Volume 315, 23 November 2006, Pages 91–100
نویسندگان
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