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Influence of tungsten sources on the synthesis and properties of ammonium dioxothiotungstate

Yunfei Bi, Shuangqin Zeng, Dadong Li, and Hong Nie

Research Institute of Petroleum Processing, SINOPEC, 18 Xue Yuan Road, 100083 Beijing, China

 

E-mail: beiyf2003@yahoo.com.cn

Received: 5 May 2009  Revised: 15 July 2009  Accepted: 16 July 2009

Abstract: Ammonium dioxothiotungstate was synthesized using different tungsten sources and characterized in detail by powder X-ray diffraction, energy dispersive X-ray spectrometry, transmission electron microscopy, nitrogen adsorption, and temperature-programmed sulfidation. It was found that tungsten oxide nanobelts are superior to ammonium metatungstate as tungsten source for the synthesis of ammonium dioxothiotungstate due to a time-consuming aging step being excluded from the synthesis route. Moreover, detailed characteristic data reveal that, when tungsten oxide nanobelts are used, the physical and chemical properties of the resulting ammonium dioxothiotungstate including particles size, specific surface area, and sulfidation pattern were improved. Also, the hydrodesulfurization measurements showed higher catalytic activity and balanced selectivity of the resulting ammonium dioxothiotungstate.

Keywords: ammonium dioxothiotungstate - tungsten oxide - nanobelts - catalytic properties

Full paper is available at www.springerlink.com.

DOI: 10.2478/s11696-009-0088-5

 

Chemical Papers 64 (1) 40–45 (2010)

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