General Information
    • ISSN: 2010-0221
    • Frequency: Bimonthly
    • DOI: 10.18178/IJCEA
    • Editor-in-Chief: Dr. Eldin W. C. Lim
    • Executive Editor: Mr. Ron C. Wu
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Editor-in-chief
Dr. Eldin W. C. Lim
Dept. of Chemical and Biomolecular Engineering,
National University of Singapore, Singapore
IJCEA 2016 Vol.7(1): 16-21 ISSN: 2010-0221
DOI: 10.7763/IJCEA.2016.V7.534

Study on the Reduction Behaviour of Nickel Doped Molybdenum Trioxide by Using Carbon Monoxide as Reductant

Alinda Samsuri, Fairous Salleh, Tengku Shafazila Tengku Saharuddin, Rizafizah Othaman, and Mohd. Ambar Yarmo
Abstract—The reduction behaviour of molybdenum trioxide, (MoO3) and nickel (Ni) doped MoO3 using carbon monoxide (CO) as reductant was investigated by temperature programmed reduction (TPR) and characterized by X-ray diffraction (XRD), Brunauer-Emmett-Teller (BET) and transmission electron microscope analysis (TEM). The reduction characteristics of MoO3 to MoO2 were examined up to temperature 700 ºC and continued with isothermal reduction by 20 vol. % CO in nitrogen. The studies show that, TPR spectra of doped MoO3 slightly shift to a lower temperature as compared to the undoped MoO3 which begins at 630 ºC. The interaction between nickel and molybdenum ions leads to this slightly decrease of the reduction temperature of Ni doped MoO3. Analysis using XRD confirmed, the addition of Ni enhances the reducibility of MoO3. By addition of Ni, complete reduction to MoO2 were take place at only 30 minutes starting of the isothermal reduction at 700 °C. Whereas, for undoped MoO3 it takes about 60 minutes to completely reduce to MoO2. However, excess of CO brings to the formation of molybdenum carbide (Mo2C). Based on the results, it is confirmed addition of Ni to MoO3 has a remarkable influence by reducing temperature in the reduction process. The ability to enhance the reducibility involved in MoO3 may be associated to the presence of nickel molybdate, NiMoO4 compound.

Index Terms—Carbon monoxide, molybdenum trioxide, nickel, reduction.

Alinda Samsuri is with School of Chemical Science & Food Technology, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, 43600 Bangi, Selangor, Malaysia, and on study leave from Centre for Defence Foundation Studies, Universiti Pertahanan Nasional Malaysia, Kem Sungai Besi, 57000 Kuala Lumpur, Malaysia (e-mail: alindasamsuri@gmail.com).
Fairous Salleh, Tengku Shafazila Tengku Saharuddin, Rizafizah Othaman, and Mohd. Ambar Yarmo are with School of Chemical Science & Food Technology, Faculty of Science and Technology, Universiti Kebangsan Malaysia, 43600 Bangi, Selangor, Malaysia (e-mail: fairoussalleh@gmail.com, tengkushafazila@gmail.com, rizafizah@ukm.edu.my, ambar@ukm.edu.my).

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Cite: Alinda Samsuri, Fairous Salleh, Tengku Shafazila Tengku Saharuddin, Rizafizah Othaman, and Mohd. Ambar Yarmo, "Study on the Reduction Behaviour of Nickel Doped Molybdenum Trioxide by Using Carbon Monoxide as Reductant," International Journal of Chemical Engineering and Applications vol. 7, no. 1, pp. 16-21, 2016.

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