Bioethanol valorization via its gas phase oxidation over Au &/or Ag supported on various oxides

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• 作者：Paresh H. Rana^a ; ^{ranaparesh@rediffmail.com} ; Parimal A. Parikh^b ; ^{parimal.svr@gmail.com}
• 关键词：Heterogeneous catalysis ; Supported catalysts ; Oxidation ; Bioethanol ; Metal-support interactions
• 刊名：Journal of Industrial and Engineering Chemistry
• 出版年：2017
• 出版时间：25 March 2017
• 年：2017
• 卷：47
• 期：Complete
• 页码：228-235
• 全文大小：3672 K
• 卷排序：47

文摘

Au and Ag nanoparticles supported on CeO2, SiO2 and ZrO2 were examined for bioethanol oxidation with air. Catalysts prepared were characterized by powder X-ray diffraction, transmission electron microscopy, scanning electron microscopy and Fourier transform infrared spectroscopy. Catalytic behavior was evaluated between 200–350 °C and 5 atm with gas hourly space velocity of 18,000 mL gcat−1 h−1. Au/ZrO2 and Au/CeO2 were found to be more active than other catalysts. Less activity of Ag/ZrO2 and Au–Ag/ZrO2 is attributed to facile oxidation of Ag under aerobic conditions. Acetaldehyde selectivity follows the order: Au/CeO2 > Ag/ZrO2 > Au–Ag/ZrO2 > Au/ZrO2 > Au/SiO2 under optimal conditions.