Characterization of FeAPO-5 molecular sieve in the presence of HF and its catalytic performance for phenol hydroxylation

Senlin Yang; Liming Kong; Xiaoqin Liu

Characterization of FeAPO-5 molecular sieve in the presence of HF and its catalytic performance for phenol hydroxylation

Senlin Yang, Liming Kong, Xiaoqin Liu

College of Chemical Engineering

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

1 Scopus citations

Abstract

Iron-substituted aluminophosphate molecular sieves (FeAPO-5) were synthesized by hydrothermal crystallization conventionally or in the presence of fluoride ion, respectively. Those synthesized molecular sieves were characterized by X-ray diffraction (XRD), scanning electron spectroscopy (SEM), Fourier transform infrared (FT-IR) spectrometer, ultraviolet visible spectroscopy (UV-vis), electron spin resonance (ESR) and hydrogen temperature programmed reduction (H₂-TPR). The results revealed that the crystallinity and BET of synthesized samples increased apparently in the presence of F⁺. The Fe³⁺ was mainly present in the framework sites of FeAPO-5 molecular sieves, but more unsaturated co-ordinate framework Fe (III) was present in FeAPO-5 by adding HF. Moreover, the FeAPO-5 synthesized in the presence of F⁺ exhibited higher catalytic activity in the phenol hydroxylation than that of synthesized conventionally.

Original language	English
Pages (from-to)	548-552+559
Journal	Huaxue Fanying Gongcheng Yu Gongyi/Chemical Reaction Engineering and Technology
Volume	23
Issue number	6
State	Published - Dec 2007

Keywords

Hydrogen fluoride
Molecular sieve
Phenol hydroxylation
Synthesis

Cite this

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title = "Characterization of FeAPO-5 molecular sieve in the presence of HF and its catalytic performance for phenol hydroxylation",

abstract = "Iron-substituted aluminophosphate molecular sieves (FeAPO-5) were synthesized by hydrothermal crystallization conventionally or in the presence of fluoride ion, respectively. Those synthesized molecular sieves were characterized by X-ray diffraction (XRD), scanning electron spectroscopy (SEM), Fourier transform infrared (FT-IR) spectrometer, ultraviolet visible spectroscopy (UV-vis), electron spin resonance (ESR) and hydrogen temperature programmed reduction (H2-TPR). The results revealed that the crystallinity and BET of synthesized samples increased apparently in the presence of F+. The Fe3+ was mainly present in the framework sites of FeAPO-5 molecular sieves, but more unsaturated co-ordinate framework Fe (III) was present in FeAPO-5 by adding HF. Moreover, the FeAPO-5 synthesized in the presence of F+ exhibited higher catalytic activity in the phenol hydroxylation than that of synthesized conventionally.",

keywords = "Hydrogen fluoride, Molecular sieve, Phenol hydroxylation, Synthesis",

author = "Senlin Yang and Liming Kong and Xiaoqin Liu",

year = "2007",

month = dec,

language = "英语",

volume = "23",

pages = "548--552+559",

journal = "Huaxue Fanying Gongcheng Yu Gongyi/Chemical Reaction Engineering and Technology",

issn = "1001-7631",

publisher = "Zhejiang University",

number = "6",

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TY - JOUR

T1 - Characterization of FeAPO-5 molecular sieve in the presence of HF and its catalytic performance for phenol hydroxylation

AU - Yang, Senlin

AU - Kong, Liming

AU - Liu, Xiaoqin

PY - 2007/12

Y1 - 2007/12

N2 - Iron-substituted aluminophosphate molecular sieves (FeAPO-5) were synthesized by hydrothermal crystallization conventionally or in the presence of fluoride ion, respectively. Those synthesized molecular sieves were characterized by X-ray diffraction (XRD), scanning electron spectroscopy (SEM), Fourier transform infrared (FT-IR) spectrometer, ultraviolet visible spectroscopy (UV-vis), electron spin resonance (ESR) and hydrogen temperature programmed reduction (H2-TPR). The results revealed that the crystallinity and BET of synthesized samples increased apparently in the presence of F+. The Fe3+ was mainly present in the framework sites of FeAPO-5 molecular sieves, but more unsaturated co-ordinate framework Fe (III) was present in FeAPO-5 by adding HF. Moreover, the FeAPO-5 synthesized in the presence of F+ exhibited higher catalytic activity in the phenol hydroxylation than that of synthesized conventionally.

AB - Iron-substituted aluminophosphate molecular sieves (FeAPO-5) were synthesized by hydrothermal crystallization conventionally or in the presence of fluoride ion, respectively. Those synthesized molecular sieves were characterized by X-ray diffraction (XRD), scanning electron spectroscopy (SEM), Fourier transform infrared (FT-IR) spectrometer, ultraviolet visible spectroscopy (UV-vis), electron spin resonance (ESR) and hydrogen temperature programmed reduction (H2-TPR). The results revealed that the crystallinity and BET of synthesized samples increased apparently in the presence of F+. The Fe3+ was mainly present in the framework sites of FeAPO-5 molecular sieves, but more unsaturated co-ordinate framework Fe (III) was present in FeAPO-5 by adding HF. Moreover, the FeAPO-5 synthesized in the presence of F+ exhibited higher catalytic activity in the phenol hydroxylation than that of synthesized conventionally.

KW - Hydrogen fluoride

KW - Molecular sieve

KW - Phenol hydroxylation

KW - Synthesis

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M3 - 文章

AN - SCOPUS:40749097626

SN - 1001-7631

VL - 23

SP - 548-552+559

JO - Huaxue Fanying Gongcheng Yu Gongyi/Chemical Reaction Engineering and Technology

JF - Huaxue Fanying Gongcheng Yu Gongyi/Chemical Reaction Engineering and Technology

IS - 6

ER -

Characterization of FeAPO-5 molecular sieve in the presence of HF and its catalytic performance for phenol hydroxylation

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Keywords

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