Catalytic liquid-phase oxidation of acetaldehyde to acetic acid over a Pt/CeO₂-ZrO₂-SnO₂/纬-alumina catalyst

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• 作者：Pil-Gyu Choi ^{CHOI-PG@chem.eng.osaka-u.ac.jp" class="auth_mail" title="E-mail the corresponding author} ; Takanobu Ohno ; Toshiyuki Masui ; Nobuhito Imanaka ; ^{imanaka@chem.eng.osaka-u.ac.jp" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Liquid-phase oxidation ; Acetaldehyde ; Rare earths ; Catalyst
• 刊名：Journal of Environmental Sciences
• 出版年：2015
• 出版时间：1 October 2015
• 年：2015
• 卷：36
• 期：Complete
• 页码：63-66
• 全文大小：505 K

文摘

Pt/CeO₂–ZrO₂–SnO₂/纬-Al₂O₃ catalysts were prepared by co-precipitation and wet impregnation methods for catalytic oxidation of acetaldehyde to acetic acid in water. In the present catalysts, Pt and CeO₂–ZrO₂–SnO₂ were successfully dispersed on the 纬-Al₂O₃ support. Dependences of platinum content and reaction time on the selective oxidation of acetaldehyde to acetic acid were investigated to optimize the reaction conditions for obtaining both high acetaldehyde conversion and highest selectivity to acetic acid. Among the catalysts, a Pt(6.4 wt.%)/Ce_0.68Zr_0.17Sn_0.15O_2.0(16 wt.%)/纬-Al₂O₃ catalyst showed the highest acetaldehyde oxidation activity. On this catalyst, acetaldehyde was completely oxidized after the reaction at 0°C for 8 hr, and the selectivity to acetic acid reached to 95% and higher after the reaction for 4 hr and longer.