Microreactor containing platinum nanoparticles for nitrobenzene hydrogenation

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• 作者：Sho Kataoka ; ^{s-kataoka@aist.go.jp} ; Yasutaka Takeuchi ; Atsuhiro Harada ; Toshiyuki Takagi ; Yasumasa Takenaka ; Norihisa Fukaya ; Hiroyuki Yasuda ; Takao Ohmori ; Akira Endo ; ^{endo-akira@aist.go.jp}
• 关键词：Microreactor ; Pt nanoparticles ; Immobilization ; Slug flow ; Nitrobenzene hydrogenation
• 刊名：Applied Catalysis A: General
• 出版年：2012
• 出版时间：15 June, 2012
• 年：2012
• 卷：427-428
• 期：Complete
• 页码：119-124
• 全文大小：883 K

文摘

Pt nanoparticles were immobilized inside a microreactor to catalyze the hydrogenation of nitrobenzene to aniline. Catalyst support layers were provided on the inner wall of the microreactor to enhance the adsorption and reaction of the Pt nanoparticles. Using this immobilization method, the Pt nanoparticles inside the microreactor exhibited a good catalytic activity and also were easily regenerated even after they were deactivated. During a 14-h continuous experiment, the average yield of aniline was higher than 92 % for 50 mM initial nitrobenzene concentration with the retention time of 12 s. This is equivalent to a turnover frequency of 3200 h^?. The deactivation mechanism of the Pt nanoparticles was also discussed in a long-time reaction.