Selective hydrogenation of o-chloronitrobenzene over palladium supported nanotubular titanium dioxide derived catalysts

被引：42

作者：

Sikhwivhilu, Lucky M.

Coville, Neil J. ^{[1
]}

Pulimaddi, Basha M.

Venkatreddy, Jayasri

Vishwanathan, Venkataraman

机构：

[1] Univ Witwatersrand, Sch Chem, Inst Mol Sci, ZA-2050 Johannesburg, South Africa

[2] Indian Inst Chem Technol, Catalysis & Phys Chem Div, Hyderabad 500007, Andhra Pradesh, India

来源：

CATALYSIS COMMUNICATIONS | 2007年 / 8卷 / 12期

关键词：

nanotubular titanate; titanium dioxide; ortho-chloronitrobenzene; ortho-chloroaniline; hydrogenation;

D O I：

10.1016/j.catcom.2007.03.023

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Titania derived nanotubes were synthesized by treating P-25 Degussa TiO2 with a concentrated (18 M) KOH solution. Ageing the material in KOH solution for 2 days resulted in formation of tubular titania and Raman analysis revealed that the material has a titanate structure. The synthesized material was used as a catalyst support for the hydrogenation of ortho-chloronitrobenzene (o-CNB) with Pd as the active phase. The vapour-phase hydrogenation of o-CNB was carried out in ethanol at 523 K and atmospheric pressure over a Pd/ TiO2 derived nanotube catalyst (Pd/TiO2-M). Pd/TiO2,-M gave complete conversion (100%) of o-CNB with the selectivity to ortho-chloroaniline (o-CAN) of 86%. The stability of the Pd/TiO2-M catalyst was tested over 5 h during which time the conversion slowly dropped to 80% (selectivity 93%) due to catalyst poisoning. TPR analysis revealed the existence of a strong palladium-support interaction and this was found to be crucial to the overall activity of the catalyst. (C) 2007 Elsevier B.V. All rights reserved.

引用

页码：1999 / 2006

页数：8

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