Selective hydrogenation of chloronitrobenzene to chloroaniline in supercritical carbon dioxide over Ni/TiO2: Significance of molecular interactions

Meng, Xiangchun; Cheng, Haiyang; Fujita, Shin-ichiro; Hao, Yufen; Shang, Yanjiao; Yu, Yancun; Cai, Shuxia; Zhao, Fengyu; Arai, Masahiko

Selective hydrogenation of chloronitrobenzene to chloroaniline in supercritical carbon dioxide over Ni/TiO2: Significance of molecular interactions

Meng, Xiangchun; Cheng, Haiyang; Fujita, Shin-ichiro et al.

Journal of Catalysis, 2010, 269(1), 131-139

Permalink : https://hdl.handle.net/2115/42642

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アクセス権	open access
URI	https://hdl.handle.net/2115/42642
タイトル	Selective hydrogenation of chloronitrobenzene to chloroaniline in supercritical carbon dioxide over Ni/TiO2: Significance of molecular interactions
著者	Meng, Xiangchun ; Cheng, Haiyang ; Fujita, Shin-ichiro ; Hao, Yufen ; Shang, Yanjiao ; Yu, Yancun ; Cai, Shuxia ; Zhao, Fengyu ; Arai, Masahiko
著者名 Meng, Xiangchun
著者名 Cheng, Haiyang
e-Rad_Researcher 80156869 著者名 Fujita, Shin-ichiro
著者名 Hao, Yufen
著者名 Shang, Yanjiao
著者名 Yu, Yancun
著者名 Cai, Shuxia
著者名 Zhao, Fengyu
e-Rad_Researcher 60125490 著者名 Arai, Masahiko
言語	英語
キーワード	Chloronitrobenzene
	Chloroaniline
	Hydrogenation
	Carbon dioxide
	Intermolecular interaction
発行日	2010-01-01
出版者	Elsevier
収録物名	Journal of Catalysis
巻(号)	269(1)
ページ	131-139
抄録	The hydrogenation of chloronitrobenzene to chloroaniline was investigated over Ni/TiO2 at 35℃ in supercritical CO2 (scCO2), ethanol, and n-hexane. The reaction rate followed the order of scCO2 > n-hexane > ethanol. In scCO2, the selectivity to chloroaniline and to aniline over Ni/TiO2 were 97-99.5% and < 1%, respectively, in the conversion range of 9-100%. The high chemoselectivity to chloroaniline cannot be achieved over Ni/TiO2 in ethanol and n-hexane. In situ high-pressure Fourier transform infrared measurements were made to study the molecular interactions of CO2 with the following reactant and reaction intermediates: chloronitrobenzene, chloronitrosobenzene, and N-chlorophenylhydroxylamine. The molecular interaction modifies the reactivity of each species and accordingly the reaction rate and the selectivity. The influence of Cl substituent on the interaction modes of CO2 with these reacting species is discussed. Possible reaction pathways for the hydrogenation of chloronitrobenzene in scCO2 over Ni/TiO2 are also proposed.
資源タイプ	学術雑誌論文
出版タイプ	Accepted Manuscript
PISSN	0021-9517
関連情報 (isVersionOf)	出版社版DOI https://doi.org/10.1016/j.jcat.2009.10.024