Ni–Ta–O mixed oxide catalysts for the low temperature oxidative dehydrogenation of ethane to ethylene

Handle URI:
http://hdl.handle.net/10754/594218
Title:
Ni–Ta–O mixed oxide catalysts for the low temperature oxidative dehydrogenation of ethane to ethylene
Authors:
Zhu, Haibo; Rosenfeld, Devon C.; Anjum, Dalaver H.; Sangaru, Shiv ( 0000-0002-3506-8238 ) ; Saih, Youssef; Ould-Chikh, Samy ( 0000-0002-3486-0944 ) ; Basset, Jean-Marie ( 0000-0003-3166-8882 )
Abstract:
The "wet" sol-gel and "dry" solid-state methods were used to prepare Ni-Ta-O mixed oxide catalysts. The resulting Ni-Ta oxides exhibit high activity and selectivity for the low temperature oxidative dehydrogenation of ethane to ethylene. The Ta/(Ni + Ta) atomic ratios (varying from 0 to 0.11 in "wet" sol-gel method, and from 0 to 0.20 in "dry" solid-state method) as well as the preparation methods used in the synthesis, play important roles in controlling catalyst structure, activity, selectivity and stability in the oxidative dehydrogenation of ethane. Electron microscopy characterizations (TEM, EELS mapping, and HAADF-STEM) clearly demonstrate that the Ta atoms are inserted into NiO crystal lattice, resulting in the formation of a new Ni-Ta oxide solid solution. More Ta atoms are found to be located at the lattice sites of crystal surface in sol-gel catalyst. While, a small amount of thin layer of Ta2O5 clusters are detected in solid-state catalyst. Further characterization by XRD, N2 adsorption, SEM, H2-TPR, XPS, and Raman techniques reveal different properties of these two Ni-Ta oxides. Due to the different properties of the Ni-Ta oxide catalysts prepared by two distinct approaches, they exhibit different catalytic behaviors in the ethane oxidative dehydrogenation reaction at low temperature. Thus, the catalytic performance of Ni-Ta-O mixed oxide catalysts can be systematically modified and tuned by selecting a suitable synthesis method, and then varying the Ta content. ©2015 Elsevier Inc. All rights reserved.
KAUST Department:
KAUST Catalysis Center (KCC)
Citation:
Zhu H, Rosenfeld DC, Anjum DH, Sangaru SS, Saih Y, et al. (2015) Ni–Ta–O mixed oxide catalysts for the low temperature oxidative dehydrogenation of ethane to ethylene. Journal of Catalysis 329: 291–306. Available: http://dx.doi.org/10.1016/j.jcat.2015.05.023.
Publisher:
Elsevier BV
Journal:
Journal of Catalysis
Issue Date:
Sep-2015
DOI:
10.1016/j.jcat.2015.05.023
Type:
Article
ISSN:
0021-9517
Sponsors:
The Dow Chemical Company and the King Abdullah University of Science and Technology
Appears in Collections:
Articles; KAUST Catalysis Center (KCC)

Full metadata record

DC FieldValue Language
dc.contributor.authorZhu, Haiboen
dc.contributor.authorRosenfeld, Devon C.en
dc.contributor.authorAnjum, Dalaver H.en
dc.contributor.authorSangaru, Shiven
dc.contributor.authorSaih, Youssefen
dc.contributor.authorOuld-Chikh, Samyen
dc.contributor.authorBasset, Jean-Marieen
dc.date.accessioned2016-01-19T14:43:35Zen
dc.date.available2016-01-19T14:43:35Zen
dc.date.issued2015-09en
dc.identifier.citationZhu H, Rosenfeld DC, Anjum DH, Sangaru SS, Saih Y, et al. (2015) Ni–Ta–O mixed oxide catalysts for the low temperature oxidative dehydrogenation of ethane to ethylene. Journal of Catalysis 329: 291–306. Available: http://dx.doi.org/10.1016/j.jcat.2015.05.023.en
dc.identifier.issn0021-9517en
dc.identifier.doi10.1016/j.jcat.2015.05.023en
dc.identifier.urihttp://hdl.handle.net/10754/594218en
dc.description.abstractThe "wet" sol-gel and "dry" solid-state methods were used to prepare Ni-Ta-O mixed oxide catalysts. The resulting Ni-Ta oxides exhibit high activity and selectivity for the low temperature oxidative dehydrogenation of ethane to ethylene. The Ta/(Ni + Ta) atomic ratios (varying from 0 to 0.11 in "wet" sol-gel method, and from 0 to 0.20 in "dry" solid-state method) as well as the preparation methods used in the synthesis, play important roles in controlling catalyst structure, activity, selectivity and stability in the oxidative dehydrogenation of ethane. Electron microscopy characterizations (TEM, EELS mapping, and HAADF-STEM) clearly demonstrate that the Ta atoms are inserted into NiO crystal lattice, resulting in the formation of a new Ni-Ta oxide solid solution. More Ta atoms are found to be located at the lattice sites of crystal surface in sol-gel catalyst. While, a small amount of thin layer of Ta2O5 clusters are detected in solid-state catalyst. Further characterization by XRD, N2 adsorption, SEM, H2-TPR, XPS, and Raman techniques reveal different properties of these two Ni-Ta oxides. Due to the different properties of the Ni-Ta oxide catalysts prepared by two distinct approaches, they exhibit different catalytic behaviors in the ethane oxidative dehydrogenation reaction at low temperature. Thus, the catalytic performance of Ni-Ta-O mixed oxide catalysts can be systematically modified and tuned by selecting a suitable synthesis method, and then varying the Ta content. ©2015 Elsevier Inc. All rights reserved.en
dc.description.sponsorshipThe Dow Chemical Company and the King Abdullah University of Science and Technologyen
dc.publisherElsevier BVen
dc.subjectEthane oxidative dehydrogenationen
dc.subjectEthylene productionen
dc.subjectNi-Ta-O mixed oxideen
dc.subjectSol-gel synthesisen
dc.subjectSolid-state synthesisen
dc.titleNi–Ta–O mixed oxide catalysts for the low temperature oxidative dehydrogenation of ethane to ethyleneen
dc.typeArticleen
dc.contributor.departmentKAUST Catalysis Center (KCC)en
dc.identifier.journalJournal of Catalysisen
dc.contributor.institutionDow Chemical Company, 2301 N. Brazosport Blvd., Freeport, TX, United Statesen
kaust.authorZhu, Haiboen
kaust.authorSangaru, Shiven
kaust.authorSaih, Youssefen
kaust.authorOuld-Chikh, Samyen
kaust.authorBasset, Jean-Marieen
All Items in KAUST are protected by copyright, with all rights reserved, unless otherwise indicated.