Roles of cerium oxide and the reducibility and recoverability of the surface oxygen species in the CeO2/MgAl2O4 catalysts

Jin an Wang; Li fang Chen; Cheng lie Li

doi:10.1016/S1381-1169(98)00205-2

Roles of cerium oxide and the reducibility and recoverability of the surface oxygen species in the CeO₂/MgAl₂O₄ catalysts

Jin an Wang, Li fang Chen, Cheng lie Li

Research output: Contribution to journal › Article › peer-review

41 Scopus citations

Abstract

The properties of surface oxygen species in the MgAl₂O₄ and CeO₂/MgAl₂O₄ catalysts were investigated by the temperature-programmed reduction (TPR) technique. Three different oxygen species existing on the surface of CeO₂/MgAl₂O₄ catalysts - surface adsorbed oxygen, surface lattice oxygen which was affected by the interaction between the supported cerium and carrier, and the oxygen species corresponding to the multilayer crystalline of CeO₂, were determined. The supported cerium oxide had different functions: it not only increased the amount of surface adsorbed oxygen, but also reduced the reduction temperature of surface lattice oxygen and improved the recoverability of the surface oxygen species. These roles of cerium oxide in the CeO₂/MgAl₂O₄ catalyst significantly affected on the SO₂ adsorption properties, in the both cases of gaseous oxygen absence and presence in the reaction stream, enhancing the De-SO₂ activity.

Original language	English
Pages (from-to)	315-323
Number of pages	9
Journal	Journal of Molecular Catalysis A: Chemical
Volume	139
Issue number	2-3
DOIs	https://doi.org/10.1016/S1381-1169(98)00205-2
State	Published - 5 Mar 1999
Externally published	Yes

Keywords

Cerium oxide
De-SO
Magnesium-alumina spinel
Sulfur-transfer catalyst
Surface oxygen
Temperature-programmed reduction

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10.1016/S1381-1169(98)00205-2

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title = "Roles of cerium oxide and the reducibility and recoverability of the surface oxygen species in the CeO2/MgAl2O4 catalysts",

abstract = "The properties of surface oxygen species in the MgAl2O4 and CeO2/MgAl2O4 catalysts were investigated by the temperature-programmed reduction (TPR) technique. Three different oxygen species existing on the surface of CeO2/MgAl2O4 catalysts - surface adsorbed oxygen, surface lattice oxygen which was affected by the interaction between the supported cerium and carrier, and the oxygen species corresponding to the multilayer crystalline of CeO2, were determined. The supported cerium oxide had different functions: it not only increased the amount of surface adsorbed oxygen, but also reduced the reduction temperature of surface lattice oxygen and improved the recoverability of the surface oxygen species. These roles of cerium oxide in the CeO2/MgAl2O4 catalyst significantly affected on the SO2 adsorption properties, in the both cases of gaseous oxygen absence and presence in the reaction stream, enhancing the De-SO2 activity.",

keywords = "Cerium oxide, De-SO, Magnesium-alumina spinel, Sulfur-transfer catalyst, Surface oxygen, Temperature-programmed reduction",

author = "Wang, {Jin an} and Chen, {Li fang} and Li, {Cheng lie}",

note = "Funding Information: The authors are grateful to the National Nature Science Foundation of China and China Jinling Petrochemical Cooperation for their financial support.",

year = "1999",

month = mar,

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doi = "10.1016/S1381-1169(98)00205-2",

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pages = "315--323",

journal = "Journal of Molecular Catalysis A: Chemical",

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TY - JOUR

T1 - Roles of cerium oxide and the reducibility and recoverability of the surface oxygen species in the CeO2/MgAl2O4 catalysts

AU - Wang, Jin an

AU - Chen, Li fang

AU - Li, Cheng lie

N1 - Funding Information: The authors are grateful to the National Nature Science Foundation of China and China Jinling Petrochemical Cooperation for their financial support.

PY - 1999/3/5

Y1 - 1999/3/5

N2 - The properties of surface oxygen species in the MgAl2O4 and CeO2/MgAl2O4 catalysts were investigated by the temperature-programmed reduction (TPR) technique. Three different oxygen species existing on the surface of CeO2/MgAl2O4 catalysts - surface adsorbed oxygen, surface lattice oxygen which was affected by the interaction between the supported cerium and carrier, and the oxygen species corresponding to the multilayer crystalline of CeO2, were determined. The supported cerium oxide had different functions: it not only increased the amount of surface adsorbed oxygen, but also reduced the reduction temperature of surface lattice oxygen and improved the recoverability of the surface oxygen species. These roles of cerium oxide in the CeO2/MgAl2O4 catalyst significantly affected on the SO2 adsorption properties, in the both cases of gaseous oxygen absence and presence in the reaction stream, enhancing the De-SO2 activity.

AB - The properties of surface oxygen species in the MgAl2O4 and CeO2/MgAl2O4 catalysts were investigated by the temperature-programmed reduction (TPR) technique. Three different oxygen species existing on the surface of CeO2/MgAl2O4 catalysts - surface adsorbed oxygen, surface lattice oxygen which was affected by the interaction between the supported cerium and carrier, and the oxygen species corresponding to the multilayer crystalline of CeO2, were determined. The supported cerium oxide had different functions: it not only increased the amount of surface adsorbed oxygen, but also reduced the reduction temperature of surface lattice oxygen and improved the recoverability of the surface oxygen species. These roles of cerium oxide in the CeO2/MgAl2O4 catalyst significantly affected on the SO2 adsorption properties, in the both cases of gaseous oxygen absence and presence in the reaction stream, enhancing the De-SO2 activity.

KW - Cerium oxide

KW - De-SO

KW - Magnesium-alumina spinel

KW - Sulfur-transfer catalyst

KW - Surface oxygen

KW - Temperature-programmed reduction

UR - http://www.scopus.com/inward/record.url?scp=0033525380&partnerID=8YFLogxK

U2 - 10.1016/S1381-1169(98)00205-2

DO - 10.1016/S1381-1169(98)00205-2

M3 - Artículo

AN - SCOPUS:0033525380

SN - 1381-1169

VL - 139

SP - 315

EP - 323

JO - Journal of Molecular Catalysis A: Chemical

JF - Journal of Molecular Catalysis A: Chemical

IS - 2-3

ER -

Roles of cerium oxide and the reducibility and recoverability of the surface oxygen species in the CeO₂/MgAl₂O₄ catalysts

Abstract

Keywords

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