CeO2 nanoclusters stabilized in aerogel matrix as catalysts for Cl2 production from HCl oxidation

Xihua Xu; Zhaoyang Fei; Xian Chen; Jihai Tang; Mifen Cui; Xu Qiao

doi:10.11949/j.issn.0438-1157.20150902

CeO₂ nanoclusters stabilized in aerogel matrix as catalysts for Cl₂ production from HCl oxidation

Xihua Xu, Zhaoyang Fei, Xian Chen, Jihai Tang, Mifen Cui, Xu Qiao

College of Chemical Engineering

Nanjing Tech University

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

3 Scopus citations

Abstract

CeO₂ nanoclusters inserted into aerogel matrix (CeO₂@M_xO_y, M_xO_y= SiO₂, ZrO₂, Al₂O₃) prepared by a single-step sol-gel method were used as catalysts for recycling Cl₂ from HCl oxidation. Due to their remarkable quantum-size effects, the properties of CeO₂ nanoclusters were significantly different from crystal phase CeO₂. The CeO₂ nanoclusters could be completely reduced at the temperature range for reduction of the surface oxygen species of crystal phase CeO₂. The unique properties of CeO₂ nanoclusters resulted in the high activity of CeO₂@M_xO_y in the process of HCl oxidation reaction. 40CeO₂@SiO₂ exhibited the highest activity and the STY (space time yield of Cl₂) reached to 2.10 g·(g cat)^-1·h^-1 at 430℃ with V_O2/V_HCl of 1 and contact time of 0.1598 h. Kinetic studies showed that both O₂ and HCl competed for the active sites rendering desorption of surface Cl as the rate-determining step.

Original language	English
Pages (from-to)	3421-3427
Number of pages	7
Journal	Huagong Xuebao/CIESC Journal
Volume	66
Issue number	9
DOIs	https://doi.org/10.11949/j.issn.0438-1157.20150902
State	Published - 1 Sep 2015

Keywords

Aerogel
Catalytic oxidation
CeO
Chlorine recycle
Kinetics
Nanoclusters

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title = "CeO2 nanoclusters stabilized in aerogel matrix as catalysts for Cl2 production from HCl oxidation",

abstract = "CeO2 nanoclusters inserted into aerogel matrix (CeO2@MxOy, MxOy= SiO2, ZrO2, Al2O3) prepared by a single-step sol-gel method were used as catalysts for recycling Cl2 from HCl oxidation. Due to their remarkable quantum-size effects, the properties of CeO2 nanoclusters were significantly different from crystal phase CeO2. The CeO2 nanoclusters could be completely reduced at the temperature range for reduction of the surface oxygen species of crystal phase CeO2. The unique properties of CeO2 nanoclusters resulted in the high activity of CeO2@MxOy in the process of HCl oxidation reaction. 40CeO2@SiO2 exhibited the highest activity and the STY (space time yield of Cl2) reached to 2.10 g·(g cat)-1·h-1 at 430℃ with VO2/VHCl of 1 and contact time of 0.1598 h. Kinetic studies showed that both O2 and HCl competed for the active sites rendering desorption of surface Cl as the rate-determining step.",

keywords = "Aerogel, Catalytic oxidation, CeO, Chlorine recycle, Kinetics, Nanoclusters",

author = "Xihua Xu and Zhaoyang Fei and Xian Chen and Jihai Tang and Mifen Cui and Xu Qiao",

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doi = "10.11949/j.issn.0438-1157.20150902",

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T1 - CeO2 nanoclusters stabilized in aerogel matrix as catalysts for Cl2 production from HCl oxidation

AU - Xu, Xihua

AU - Fei, Zhaoyang

AU - Chen, Xian

AU - Tang, Jihai

AU - Cui, Mifen

AU - Qiao, Xu

PY - 2015/9/1

Y1 - 2015/9/1

N2 - CeO2 nanoclusters inserted into aerogel matrix (CeO2@MxOy, MxOy= SiO2, ZrO2, Al2O3) prepared by a single-step sol-gel method were used as catalysts for recycling Cl2 from HCl oxidation. Due to their remarkable quantum-size effects, the properties of CeO2 nanoclusters were significantly different from crystal phase CeO2. The CeO2 nanoclusters could be completely reduced at the temperature range for reduction of the surface oxygen species of crystal phase CeO2. The unique properties of CeO2 nanoclusters resulted in the high activity of CeO2@MxOy in the process of HCl oxidation reaction. 40CeO2@SiO2 exhibited the highest activity and the STY (space time yield of Cl2) reached to 2.10 g·(g cat)-1·h-1 at 430℃ with VO2/VHCl of 1 and contact time of 0.1598 h. Kinetic studies showed that both O2 and HCl competed for the active sites rendering desorption of surface Cl as the rate-determining step.

AB - CeO2 nanoclusters inserted into aerogel matrix (CeO2@MxOy, MxOy= SiO2, ZrO2, Al2O3) prepared by a single-step sol-gel method were used as catalysts for recycling Cl2 from HCl oxidation. Due to their remarkable quantum-size effects, the properties of CeO2 nanoclusters were significantly different from crystal phase CeO2. The CeO2 nanoclusters could be completely reduced at the temperature range for reduction of the surface oxygen species of crystal phase CeO2. The unique properties of CeO2 nanoclusters resulted in the high activity of CeO2@MxOy in the process of HCl oxidation reaction. 40CeO2@SiO2 exhibited the highest activity and the STY (space time yield of Cl2) reached to 2.10 g·(g cat)-1·h-1 at 430℃ with VO2/VHCl of 1 and contact time of 0.1598 h. Kinetic studies showed that both O2 and HCl competed for the active sites rendering desorption of surface Cl as the rate-determining step.

KW - Aerogel

KW - Catalytic oxidation

KW - CeO

KW - Chlorine recycle

KW - Kinetics

KW - Nanoclusters

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DO - 10.11949/j.issn.0438-1157.20150902

M3 - 文章

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SN - 0438-1157

VL - 66

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JO - Huagong Xuebao/CIESC Journal

JF - Huagong Xuebao/CIESC Journal

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ER -

CeO₂ nanoclusters stabilized in aerogel matrix as catalysts for Cl₂ production from HCl oxidation

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