Effect of isopropanol aging of Zr(OH)4 on n-hexane isomerization over Pt-SO42-/Al2O3-ZrO 2

G. X. Yu; X. L. Zhou; F. Liu; C. L. Li; L. F. Chen; J. A. Wang

doi:10.1016/j.cattod.2009.02.045

Effect of isopropanol aging of Zr(OH)₄ on n-hexane isomerization over Pt-SO₄^2-/Al₂O₃-ZrO ₂

G. X. Yu, X. L. Zhou, F. Liu, C. L. Li, L. F. Chen, J. A. Wang

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

11 Scopus citations

Abstract

Two Pt/SO₄^2-/ZrO₂-Al₂O ₃ (denoted as PSZA and I-PSZA) catalysts were prepared by using Zr(OH)₄ as precursor aged in different conditions, including conventional aging and isopropanol aging. The textural properties, crystalline structure, surface acidity and reduction behaviours of the as PSZA and I-PSZA catalysts were comparatively investigated by N₂ adsorption isotherms, XRD, TG-DSC, pyridine-FTIR and H₂-TPR techniques. Catalytic tests showed that, using isopropanol aged Zr(OH)₄ as ZrO₂ precursor, in the n-hexane isomerization reaction, the catalytic activity and stability of the catalyst could be greatly increased and the selectivity of 2,2-DMB was enhanced by more than two times. It was found that isopropanol aging of Zr(OH)₄ modified the textural properties and inhibited zirconia phase transformation and stabilized the tetragonal ZrO₂ crystalline structure. On the I-PSZA catalyst, more acid centers were formed in comparison with that presented on the PSZA catalyst. Our experimental results show that the surface acidity, textural properties and phase composition of the Pt/SO₄^2-/ZrO₂-Al₂O ₃ catalysts play an important role in n-hexane hydroisomerization.

Original language	English
Pages (from-to)	70-74
Number of pages	5
Journal	Catalysis Today
Volume	148
Issue number	1-2
DOIs	https://doi.org/10.1016/j.cattod.2009.02.045
State	Published - 30 Oct 2010
Externally published	Yes

Keywords

Alumina
Hydroisomerization
Isopropanol aging
Sulfated zirconia
Zirconium hydroxide
n-Hexane

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10.1016/j.cattod.2009.02.045

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@article{821ef1e72151443aa2f75519a90a2df1,

title = "Effect of isopropanol aging of Zr(OH)4 on n-hexane isomerization over Pt-SO42-/Al2O3-ZrO 2",

abstract = "Two Pt/SO42-/ZrO2-Al2O 3 (denoted as PSZA and I-PSZA) catalysts were prepared by using Zr(OH)4 as precursor aged in different conditions, including conventional aging and isopropanol aging. The textural properties, crystalline structure, surface acidity and reduction behaviours of the as PSZA and I-PSZA catalysts were comparatively investigated by N2 adsorption isotherms, XRD, TG-DSC, pyridine-FTIR and H2-TPR techniques. Catalytic tests showed that, using isopropanol aged Zr(OH)4 as ZrO2 precursor, in the n-hexane isomerization reaction, the catalytic activity and stability of the catalyst could be greatly increased and the selectivity of 2,2-DMB was enhanced by more than two times. It was found that isopropanol aging of Zr(OH)4 modified the textural properties and inhibited zirconia phase transformation and stabilized the tetragonal ZrO2 crystalline structure. On the I-PSZA catalyst, more acid centers were formed in comparison with that presented on the PSZA catalyst. Our experimental results show that the surface acidity, textural properties and phase composition of the Pt/SO42-/ZrO2-Al2O 3 catalysts play an important role in n-hexane hydroisomerization.",

keywords = "Alumina, Hydroisomerization, Isopropanol aging, Sulfated zirconia, Zirconium hydroxide, n-Hexane",

author = "Yu, {G. X.} and Zhou, {X. L.} and F. Liu and Li, {C. L.} and Chen, {L. F.} and Wang, {J. A.}",

note = "Funding Information: We would like to thank the financial supports from the key international cooperative research projects by National Ministry of Science and Technology, PR China (No. 2004CB720603).",

year = "2010",

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doi = "10.1016/j.cattod.2009.02.045",

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volume = "148",

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TY - JOUR

T1 - Effect of isopropanol aging of Zr(OH)4 on n-hexane isomerization over Pt-SO42-/Al2O3-ZrO 2

AU - Yu, G. X.

AU - Zhou, X. L.

AU - Liu, F.

AU - Li, C. L.

AU - Chen, L. F.

AU - Wang, J. A.

N1 - Funding Information: We would like to thank the financial supports from the key international cooperative research projects by National Ministry of Science and Technology, PR China (No. 2004CB720603).

PY - 2010/10/30

Y1 - 2010/10/30

N2 - Two Pt/SO42-/ZrO2-Al2O 3 (denoted as PSZA and I-PSZA) catalysts were prepared by using Zr(OH)4 as precursor aged in different conditions, including conventional aging and isopropanol aging. The textural properties, crystalline structure, surface acidity and reduction behaviours of the as PSZA and I-PSZA catalysts were comparatively investigated by N2 adsorption isotherms, XRD, TG-DSC, pyridine-FTIR and H2-TPR techniques. Catalytic tests showed that, using isopropanol aged Zr(OH)4 as ZrO2 precursor, in the n-hexane isomerization reaction, the catalytic activity and stability of the catalyst could be greatly increased and the selectivity of 2,2-DMB was enhanced by more than two times. It was found that isopropanol aging of Zr(OH)4 modified the textural properties and inhibited zirconia phase transformation and stabilized the tetragonal ZrO2 crystalline structure. On the I-PSZA catalyst, more acid centers were formed in comparison with that presented on the PSZA catalyst. Our experimental results show that the surface acidity, textural properties and phase composition of the Pt/SO42-/ZrO2-Al2O 3 catalysts play an important role in n-hexane hydroisomerization.

AB - Two Pt/SO42-/ZrO2-Al2O 3 (denoted as PSZA and I-PSZA) catalysts were prepared by using Zr(OH)4 as precursor aged in different conditions, including conventional aging and isopropanol aging. The textural properties, crystalline structure, surface acidity and reduction behaviours of the as PSZA and I-PSZA catalysts were comparatively investigated by N2 adsorption isotherms, XRD, TG-DSC, pyridine-FTIR and H2-TPR techniques. Catalytic tests showed that, using isopropanol aged Zr(OH)4 as ZrO2 precursor, in the n-hexane isomerization reaction, the catalytic activity and stability of the catalyst could be greatly increased and the selectivity of 2,2-DMB was enhanced by more than two times. It was found that isopropanol aging of Zr(OH)4 modified the textural properties and inhibited zirconia phase transformation and stabilized the tetragonal ZrO2 crystalline structure. On the I-PSZA catalyst, more acid centers were formed in comparison with that presented on the PSZA catalyst. Our experimental results show that the surface acidity, textural properties and phase composition of the Pt/SO42-/ZrO2-Al2O 3 catalysts play an important role in n-hexane hydroisomerization.

KW - Alumina

KW - Hydroisomerization

KW - Isopropanol aging

KW - Sulfated zirconia

KW - Zirconium hydroxide

KW - n-Hexane

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SN - 0920-5861

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JO - Catalysis Today

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ER -

Effect of isopropanol aging of Zr(OH)₄ on n-hexane isomerization over Pt-SO₄^2-/Al₂O₃-ZrO ₂

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