Benzene hydrogenation over NI/TiO2-ZrO2 catalysts

Wang, Ikai; Huang, Wen-Hsi; Jung-Chung, W

doi:10.1016/s0166-9834(00)84006-3

Cited by 17 publications

(3 citation statements)

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“…The stoichiometry of ZrO 2 /TiO 2 is known to be an important factor for ensuring good properties [2][3][4]. Many researches indicated that the ZrO 2 /TiO 2 composites have higher surface areas, better stability and stronger surface acidity and alkalinity than the pure ZrO 2 /TiO 2 [6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Preparation, phase transformation and microstructure of ZrxTi1−xO2 (x=0.1–0.9) fine fibers

Zhu

Wang

et al. 2009

Journal of Non-Crystalline Solids

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Section: Introductionmentioning

confidence: 99%

Preparation, phase transformation and microstructure of ZrxTi1−xO2 (x=0.1–0.9) fine fibers

Zhu

Wang

et al. 2009

Journal of Non-Crystalline Solids

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“…TiO 2 −ZrO 2 has been used as a support for MoO 3 - and V 2 O 5 -based catalysts for hydroprocessing applications and NO x reduction with NH 3 , respectively . V 2 O 5 /TiO 2 −ZrO 2 was found to exhibit better catalytic properties for the synthesis of isobutyraldehyde from methanol and ethanol mixtures .…”

Section: Introductionmentioning

confidence: 99%

Transmission Electron Microscopy and Energy-Dispersive X-ray Spectroscopy Study of V₂O₅/TiO₂−ZrO₂ Catalyst

Reddy¹,

Rojas²,

Fernández³

et al. 2000

Langmuir

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Transmission electron microscopy (TEM) and energy-dispersive X-ray (EDX) spectroscopy techniques were used to investigate the structure of a TiO2−ZrO2 binary oxide support and a V2O5/TiO2−ZrO2 catalyst. The TiO2−ZrO2 (1:1 mole ratio) was obtained by a homogeneous coprecipitation method, and the 12 wt % V2O5/TiO2−ZrO2 catalyst was prepared by a wet impregnation method. Both samples were subjected to thermal treatments from 773 to 1073 K in order to understand the temperature stability of these materials. The TiO2−ZrO2 support was in an amorphous state when calcined at 773 K. However, the formation of the ZrTiO4 compound was noted at higher calcination temperatures characterized by a layer structure with a lattice spacing of ca. 2.87 Å due to the (111) plane of this compound. The V2O5/TiO2−ZrO2 catalyst when calcined at 773 K shows heterogeneity in the distribution of vanadium oxide species on the support surface. The TEM/EDX analysis further provides clear evidence for ZrV2O7 and TiO2 formation at 1073 K calcination in agreement with X-ray diffraction observations.

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“…have been used and studied for the nitration of aromatic substrates like benzene, toluene, halo-benzene, phenol, anisole and disubstituted benzene [4][5][6][7][8][9][10]11,12]. However, some of these catalysts were suffered with need of longer residence time, tedious workup procedures and above all, their expensiveness MoO3 based catalysts are well known and successfully tested for different applications like, trasesterification of dimethyl oxalate with phenol [13], thiophene hydrodesulfurization and 1-cyclohehene hydrogenation [14] and hydroprocessing applications [15]. An activity of these catalysts in the respective reactions was found related with strong acidity possessed by them.…”

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confidence: 99%

Mixed Oxide Supported MoO3 Catalyst: Preparation, Characterization and Activities in Nitration of o-xylene

Kemdeo

Sapkal

Chaudhari

2010

Bull. Chem. React. Eng. Catal.

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TiO2-ZrO2 mixed oxide support was prepared and impregnated with 12 wt % MoO3 and calcined at various temperatures. The resultant catalyst systems were characterized by XRD, FT-IR, BET, SEM, NH3-TPD and pyridine adsorbed FT-IR methods to know the physico-chemical changes occurred in course of thermal treatment. Activities of these catalysts were tested by employing them in the nitration of o-xylene. Mostly, 500 oC calcined catalyst sample was found to be most active for nitration reaction. Catalyst calcined at higher temperatures showed the negative influence on o-xylene conversion and 4-nitro-o-xylene selectivity. Conversion can be correlated with the presence of strong Brönsted acid sites over the catalyst surface whereas change in selectivity was found attributed to the pore diameter of the catalyst. These catalysts also performed satisfactorily, when used for nitration of other aromatics. No use of corrosive sulfuric acid and efficient reusability of the catalyst make the process environmentally friendly and economic. © 2010 by Authors, Published by BCREC Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0)

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Benzene hydrogenation over NI/TiO2-ZrO2 catalysts

Cited by 17 publications

References 12 publications

Preparation, phase transformation and microstructure of ZrxTi1−xO2 (x=0.1–0.9) fine fibers

Preparation, phase transformation and microstructure of ZrxTi1−xO2 (x=0.1–0.9) fine fibers

Transmission Electron Microscopy and Energy-Dispersive X-ray Spectroscopy Study of V₂O₅/TiO₂−ZrO₂ Catalyst

Mixed Oxide Supported MoO3 Catalyst: Preparation, Characterization and Activities in Nitration of o-xylene

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Benzene hydrogenation over NI/TiO2-ZrO2 catalysts

Cited by 17 publications

References 12 publications

Preparation, phase transformation and microstructure of ZrxTi1−xO2 (x=0.1–0.9) fine fibers

Preparation, phase transformation and microstructure of ZrxTi1−xO2 (x=0.1–0.9) fine fibers

Transmission Electron Microscopy and Energy-Dispersive X-ray Spectroscopy Study of V2O5/TiO2−ZrO2 Catalyst

Mixed Oxide Supported MoO3 Catalyst: Preparation, Characterization and Activities in Nitration of o-xylene

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Transmission Electron Microscopy and Energy-Dispersive X-ray Spectroscopy Study of V₂O₅/TiO₂−ZrO₂ Catalyst