View in EDS

Impact of ceria over WO3–ZrO2 supported Ni catalyst towards hydrogen production through dry reforming of methane.

Saved in:
Bibliographic Details
Title: Impact of ceria over WO3–ZrO2 supported Ni catalyst towards hydrogen production through dry reforming of methane.
Authors: Patel, Rutu1 (AUTHOR), Al-Fatesh, Ahmed S.1,2 (AUTHOR) aalfatesh@ksu.edu.sa, Fakeeha, Anis H.2 (AUTHOR), Arafat, Yasir2 (AUTHOR), Kasim, Samsudeen O.2 (AUTHOR), Ibrahim, Ahmed A.2 (AUTHOR), Al-Zahrani, Salma A.3 (AUTHOR), Abasaeed, Ahmed E.2 (AUTHOR), Srivastava, Vijay Kumar1 (AUTHOR), Kumar, Rawesh1 (AUTHOR) kr.rawesh@gmail.com
Source: International Journal of Hydrogen Energy. Jul2021, Vol. 46 Issue 49, p25015-25028. 14p.
Subjects: Steam reforming, Catalyst supports, Cerium oxides, Hydrogen production, Nickel catalysts, Carbon dioxide
Abstract: ZrO 2 supported Nickel catalyst, 9 wt%WO 3 -91 wt%ZrO 2 supported Nickel catalyst and ceria promoted 9 wt%WO 3 -91 wt%ZrO 2 supported Nickel catalyst (5NixCe/WZr catalyst) is synthesized via wet impregnation and characterized by XRD, UV–vis, CO 2 -TPD, H 2 TPR-CO 2 TPD-H 2 TPR cycle, TPH, TPH followed by O 2 -TPO and CO 2 -TPD followed by O 2 -TPO. Due to limitation in surface re-oxidizing capability and shading of catalytic active sites by thermally stable carbonates; catalytic activity of unpromoted catalyst system is less. 5NixCe/WZr catalyst has extended CH 4 decomposition sites, additional basic sites (during the reaction) for CO 2 adsorption and excellent redox accompany (Ce +4/Ce +3, W+6/W +4) for carbon oxidation and re-oxidizing capability of surface up to the pristine level. 2.5 wt% Ceria promotional addition is resulted into 78% H 2 yield constantly up to 420 min TOS. The carbon deposit over ceria promoted system (up to 2.5 wt%) is amorphous type, more easily/moderately reducible, oxidizable and removable. • 2.5%Ceria promoted WO 3 –ZrO 2 supported Ni carries extended CH 4 decomposition sites. • Additional redox accompany (Ce+4/Ce+3, W+6/W+4) gear up carbon deposit oxidation. • The catalyst surface is able to re-oxidize in the stream of CO 2 up to pristine level. • Altogether, catalyst showed 78% H 2 yield through dry reforming of methane. [ABSTRACT FROM AUTHOR]
Copyright of International Journal of Hydrogen Energy is the property of Pergamon Press - An Imprint of Elsevier Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
Description
Abstract:ZrO 2 supported Nickel catalyst, 9 wt%WO 3 -91 wt%ZrO 2 supported Nickel catalyst and ceria promoted 9 wt%WO 3 -91 wt%ZrO 2 supported Nickel catalyst (5NixCe/WZr catalyst) is synthesized via wet impregnation and characterized by XRD, UV–vis, CO 2 -TPD, H 2 TPR-CO 2 TPD-H 2 TPR cycle, TPH, TPH followed by O 2 -TPO and CO 2 -TPD followed by O 2 -TPO. Due to limitation in surface re-oxidizing capability and shading of catalytic active sites by thermally stable carbonates; catalytic activity of unpromoted catalyst system is less. 5NixCe/WZr catalyst has extended CH 4 decomposition sites, additional basic sites (during the reaction) for CO 2 adsorption and excellent redox accompany (Ce +4/Ce +3, W+6/W +4) for carbon oxidation and re-oxidizing capability of surface up to the pristine level. 2.5 wt% Ceria promotional addition is resulted into 78% H 2 yield constantly up to 420 min TOS. The carbon deposit over ceria promoted system (up to 2.5 wt%) is amorphous type, more easily/moderately reducible, oxidizable and removable. • 2.5%Ceria promoted WO 3 –ZrO 2 supported Ni carries extended CH 4 decomposition sites. • Additional redox accompany (Ce+4/Ce+3, W+6/W+4) gear up carbon deposit oxidation. • The catalyst surface is able to re-oxidize in the stream of CO 2 up to pristine level. • Altogether, catalyst showed 78% H 2 yield through dry reforming of methane. [ABSTRACT FROM AUTHOR]
ISSN:03603199
DOI:10.1016/j.ijhydene.2021.05.049