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Meerwein–Ponndorf–Verley Reduction of Crotonaldehyde over Supported Zirconium Oxide Catalysts Using Batch and Tubular Flow Reactors
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2017-12-19 00:00:00 , DOI: 10.1021/acs.iecr.7b03961 Atsushi Segawa 1 , Keita Taniya , Yuichi Ichihashi , Satoru Nishiyama , Naohiro Yoshida , Masaki Okamoto
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2017-12-19 00:00:00 , DOI: 10.1021/acs.iecr.7b03961 Atsushi Segawa 1 , Keita Taniya , Yuichi Ichihashi , Satoru Nishiyama , Naohiro Yoshida , Masaki Okamoto
Affiliation
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The authors studied Meerwein–Ponndorf–Verley (MPV) reduction of crotonaldehyde using batch and tubular flow reactors. Various ZrO2/SiO2 catalysts prepared from commercially available carriers and precursors were subjected to activity testing using autoclave batch reactors. To determine the degree of Zr dispersion in the ZrO2/SiO2 catalysts, X-ray photoelectron spectroscopy (XPS) measurements and the benzaldehyde-ammonia titration (BAT) method were carried out. The results suggested a positive correlation between Zr dispersion and crotonaldehyde conversion. Durability tests using tubular flow reactors were performed with the most suitable catalyst, which was selected through batch reactions and catalyst characterizations. Almost no degradation of the catalytic activity was observed over 2,200 h in a liquid-phase reaction, while catalyst durability was short in a gas-phase reaction. It was surmised that in the liquid-phase, 2-propanol (hydrogen donor) in the feed had dissolved the reaction byproducts to purge from the catalyst. In addition, a continuous process flow design that includes 2-propanol regeneration was proposed for industrial production.
中文翻译：
Meerwein–Ponndorf–Verley使用间歇式和管式流动反应器在负载的氧化锆催化剂上还原巴豆醛
作者研究了Meerwein–Ponndorf–Verley（MPV）使用间歇式和管式流动反应器还原巴豆醛的方法。使用高压釜间歇反应器对由市售载体和前体制备的各种ZrO 2 / SiO 2催化剂进行活性测试。确定ZrO 2 / SiO 2中的Zr分散度进行了催化剂，X射线光电子能谱（XPS）测量和苯甲醛-氨滴定（BAT）方法。结果表明Zr分散度与巴豆醛转化率之间呈正相关。使用管式流动反应器的耐久性测试是通过最合适的催化剂进行的，该催化剂是通过间歇反应和催化剂表征进行选择的。在液相反应中，在2,200 h内几乎没有观察到催化活性的降低，而在气相反应中，催化剂的耐久性却很差。据推测，在液相中，进料中的2-丙醇（氢供体）溶解了反应副产物以从催化剂中清除。另外，提出了一种包括2-丙醇再生的连续工艺流程设计用于工业生产。
更新日期：2017-12-19
中文翻译：
Meerwein–Ponndorf–Verley使用间歇式和管式流动反应器在负载的氧化锆催化剂上还原巴豆醛
作者研究了Meerwein–Ponndorf–Verley（MPV）使用间歇式和管式流动反应器还原巴豆醛的方法。使用高压釜间歇反应器对由市售载体和前体制备的各种ZrO 2 / SiO 2催化剂进行活性测试。确定ZrO 2 / SiO 2中的Zr分散度进行了催化剂，X射线光电子能谱（XPS）测量和苯甲醛-氨滴定（BAT）方法。结果表明Zr分散度与巴豆醛转化率之间呈正相关。使用管式流动反应器的耐久性测试是通过最合适的催化剂进行的，该催化剂是通过间歇反应和催化剂表征进行选择的。在液相反应中，在2,200 h内几乎没有观察到催化活性的降低，而在气相反应中，催化剂的耐久性却很差。据推测，在液相中，进料中的2-丙醇（氢供体）溶解了反应副产物以从催化剂中清除。另外，提出了一种包括2-丙醇再生的连续工艺流程设计用于工业生产。
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