Reduction behaviour of WO3 to W under carbon monoxide atmosphere

Fairous Salleh, Tengku Shafazila Tengku Saharuddin, Alinda Samsuri, Rizafizah Othaman, Mohamed Wahab Mohamed Hisham, Mohd. Ambar Yarmo

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The reduction behaviour of tungsten oxide have been studied by using temperature programmed reduction (TPR) and X-ray diffraction (XRD). The reduction behavior was examined by a nonisothermal reduction up to 900 °C then continued with isothermal reduction at 900 °C for 15, 30 and 45 min time under (40% v/v) carbon monoxide in nitrogen (CO in N2) atmosphere. The TPR signal clearly shows one peak attributed to formation of suboxide W18O49 (more) and WO2 (less) observed at 80 min. Based on the characterization of the reduction residue using XRD, it was found that, nonisothermal reduction of WO3 at temperature 900 °C partially converted to some W18O49 and WO2 phases. However, after increased the reaction holding time for 45 min, WO3 phases disappeared and converted to WO2 and W metal phases. It is obviously shows that by hold the reduction time could improve the reducibility of the sample oxide. Furthermore, it is suggested that reduction by using CO as reducing agent follows the consecutives steps WO3 → WO2.92 →W18O49 → WO2 → W.

Original languageEnglish
Title of host publicationMaterials Science Forum
PublisherTrans Tech Publications Ltd
Pages305-308
Number of pages4
Volume840
ISBN (Print)9783038355373
DOIs
Publication statusPublished - 2016
EventSeminar on Advanced Materials haracterization Techniques in Research, Industry and Nuclear Applications, AMCT 2015 - Selangor, Malaysia
Duration: 9 Jun 201510 Jun 2015

Publication series

NameMaterials Science Forum
Volume840
ISSN (Print)02555476

Other

OtherSeminar on Advanced Materials haracterization Techniques in Research, Industry and Nuclear Applications, AMCT 2015
CountryMalaysia
CitySelangor
Period9/6/1510/6/15

Fingerprint

Carbon Monoxide
Carbon monoxide
carbon monoxide
atmospheres
X ray diffraction
Oxides
tungsten oxides
Reducing Agents
Reducing agents
diffraction
Temperature
temperature
Tungsten
x rays
Nitrogen
Metals
nitrogen
oxides

Keywords

  • Carbon monoxide
  • TPR
  • Tungsten (VI) oxide
  • XRD

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering
  • Mechanics of Materials

Cite this

Salleh, F., Tengku Saharuddin, T. S., Samsuri, A., Othaman, R., Mohamed Hisham, M. W., & Yarmo, M. A. (2016). Reduction behaviour of WO3 to W under carbon monoxide atmosphere. In Materials Science Forum (Vol. 840, pp. 305-308). (Materials Science Forum; Vol. 840). Trans Tech Publications Ltd. https://doi.org/10.4028/www.scientific.net/MSF.840.305

Reduction behaviour of WO3 to W under carbon monoxide atmosphere. / Salleh, Fairous; Tengku Saharuddin, Tengku Shafazila; Samsuri, Alinda; Othaman, Rizafizah; Mohamed Hisham, Mohamed Wahab; Yarmo, Mohd. Ambar.

Materials Science Forum. Vol. 840 Trans Tech Publications Ltd, 2016. p. 305-308 (Materials Science Forum; Vol. 840).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Salleh, F, Tengku Saharuddin, TS, Samsuri, A, Othaman, R, Mohamed Hisham, MW & Yarmo, MA 2016, Reduction behaviour of WO3 to W under carbon monoxide atmosphere. in Materials Science Forum. vol. 840, Materials Science Forum, vol. 840, Trans Tech Publications Ltd, pp. 305-308, Seminar on Advanced Materials haracterization Techniques in Research, Industry and Nuclear Applications, AMCT 2015, Selangor, Malaysia, 9/6/15. https://doi.org/10.4028/www.scientific.net/MSF.840.305
Salleh F, Tengku Saharuddin TS, Samsuri A, Othaman R, Mohamed Hisham MW, Yarmo MA. Reduction behaviour of WO3 to W under carbon monoxide atmosphere. In Materials Science Forum. Vol. 840. Trans Tech Publications Ltd. 2016. p. 305-308. (Materials Science Forum). https://doi.org/10.4028/www.scientific.net/MSF.840.305
Salleh, Fairous ; Tengku Saharuddin, Tengku Shafazila ; Samsuri, Alinda ; Othaman, Rizafizah ; Mohamed Hisham, Mohamed Wahab ; Yarmo, Mohd. Ambar. / Reduction behaviour of WO3 to W under carbon monoxide atmosphere. Materials Science Forum. Vol. 840 Trans Tech Publications Ltd, 2016. pp. 305-308 (Materials Science Forum).
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AB - The reduction behaviour of tungsten oxide have been studied by using temperature programmed reduction (TPR) and X-ray diffraction (XRD). The reduction behavior was examined by a nonisothermal reduction up to 900 °C then continued with isothermal reduction at 900 °C for 15, 30 and 45 min time under (40% v/v) carbon monoxide in nitrogen (CO in N2) atmosphere. The TPR signal clearly shows one peak attributed to formation of suboxide W18O49 (more) and WO2 (less) observed at 80 min. Based on the characterization of the reduction residue using XRD, it was found that, nonisothermal reduction of WO3 at temperature 900 °C partially converted to some W18O49 and WO2 phases. However, after increased the reaction holding time for 45 min, WO3 phases disappeared and converted to WO2 and W metal phases. It is obviously shows that by hold the reduction time could improve the reducibility of the sample oxide. Furthermore, it is suggested that reduction by using CO as reducing agent follows the consecutives steps WO3 → WO2.92 →W18O49 → WO2 → W.

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