Hydrophobicity and catalytic properties of Ti-MFI zeolites synthesized by microwave and conventional heating

Cheng Hua Xu; Taihuan Jin; Sung Hwa Jhung; Jong San Chang; Jin Soo Hwang; Sang Eon Park

doi:10.1016/j.cattod.2005.10.063

Hydrophobicity and catalytic properties of Ti-MFI zeolites synthesized by microwave and conventional heating

Cheng Hua Xu, Taihuan Jin, Sung Hwa Jhung, Jong San Chang, Jin Soo Hwang, Sang Eon Park

Research output: Contribution to journal › Conference article › peer-review

45 Scopus citations

Abstract

Ti-incorporated MFI zeolite (Ti-MFI-MW) has been synthesized with microwave heating. Their physicochemical properties such as surface hydrophobicity, and adsorption and catalytic properties have been compared with those of Ti-incorporated MFI zeolite (Ti-MFI-CH) prepared by conventional hydrothermal method. Competitive adsorption measurements with toluene and water revealed that the hydrophobicity index of Ti-MFI-MW (8.0) is higher than that of Ti-MFI-CH (6.2). IR spectra showed that Ti-MFI-MW also has a lower content of surface hydroxyl groups and adsorbs a larger amount of 1-hexene than Ti-MFI-CH. These results pointed out that Ti-MFI-MW is more hydrophobic than Ti-MFI-CH. Epoxidation reactions of 1-hexene and styrene with hydrogen peroxide have been conducted to investigate catalytic properties of the Ti-MFI zeolites according to the synthesis method. The conversions and epoxide selectivities over Ti-MFI-MW are higher than those over Ti-MFI-CH due to the enhanced surface hydrophobicity.

Original language	English
Pages (from-to)	366-372
Number of pages	7
Journal	Catalysis Today
Volume	111
Issue number	3-4
DOIs	https://doi.org/10.1016/j.cattod.2005.10.063
State	Published - 15 Feb 2006

Keywords

Epoxidation
Hydrophobicity
Microwave heating
Modified hydrophobicity index
Ti-MFI zeolite

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10.1016/j.cattod.2005.10.063

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title = "Hydrophobicity and catalytic properties of Ti-MFI zeolites synthesized by microwave and conventional heating",

abstract = "Ti-incorporated MFI zeolite (Ti-MFI-MW) has been synthesized with microwave heating. Their physicochemical properties such as surface hydrophobicity, and adsorption and catalytic properties have been compared with those of Ti-incorporated MFI zeolite (Ti-MFI-CH) prepared by conventional hydrothermal method. Competitive adsorption measurements with toluene and water revealed that the hydrophobicity index of Ti-MFI-MW (8.0) is higher than that of Ti-MFI-CH (6.2). IR spectra showed that Ti-MFI-MW also has a lower content of surface hydroxyl groups and adsorbs a larger amount of 1-hexene than Ti-MFI-CH. These results pointed out that Ti-MFI-MW is more hydrophobic than Ti-MFI-CH. Epoxidation reactions of 1-hexene and styrene with hydrogen peroxide have been conducted to investigate catalytic properties of the Ti-MFI zeolites according to the synthesis method. The conversions and epoxide selectivities over Ti-MFI-MW are higher than those over Ti-MFI-CH due to the enhanced surface hydrophobicity.",

keywords = "Epoxidation, Hydrophobicity, Microwave heating, Modified hydrophobicity index, Ti-MFI zeolite",

author = "Xu, {Cheng Hua} and Taihuan Jin and Jhung, {Sung Hwa} and Chang, {Jong San} and Hwang, {Jin Soo} and Park, {Sang Eon}",

year = "2006",

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doi = "10.1016/j.cattod.2005.10.063",

language = "English",

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T1 - Hydrophobicity and catalytic properties of Ti-MFI zeolites synthesized by microwave and conventional heating

AU - Xu, Cheng Hua

AU - Jin, Taihuan

AU - Jhung, Sung Hwa

AU - Chang, Jong San

AU - Hwang, Jin Soo

AU - Park, Sang Eon

PY - 2006/2/15

Y1 - 2006/2/15

N2 - Ti-incorporated MFI zeolite (Ti-MFI-MW) has been synthesized with microwave heating. Their physicochemical properties such as surface hydrophobicity, and adsorption and catalytic properties have been compared with those of Ti-incorporated MFI zeolite (Ti-MFI-CH) prepared by conventional hydrothermal method. Competitive adsorption measurements with toluene and water revealed that the hydrophobicity index of Ti-MFI-MW (8.0) is higher than that of Ti-MFI-CH (6.2). IR spectra showed that Ti-MFI-MW also has a lower content of surface hydroxyl groups and adsorbs a larger amount of 1-hexene than Ti-MFI-CH. These results pointed out that Ti-MFI-MW is more hydrophobic than Ti-MFI-CH. Epoxidation reactions of 1-hexene and styrene with hydrogen peroxide have been conducted to investigate catalytic properties of the Ti-MFI zeolites according to the synthesis method. The conversions and epoxide selectivities over Ti-MFI-MW are higher than those over Ti-MFI-CH due to the enhanced surface hydrophobicity.

AB - Ti-incorporated MFI zeolite (Ti-MFI-MW) has been synthesized with microwave heating. Their physicochemical properties such as surface hydrophobicity, and adsorption and catalytic properties have been compared with those of Ti-incorporated MFI zeolite (Ti-MFI-CH) prepared by conventional hydrothermal method. Competitive adsorption measurements with toluene and water revealed that the hydrophobicity index of Ti-MFI-MW (8.0) is higher than that of Ti-MFI-CH (6.2). IR spectra showed that Ti-MFI-MW also has a lower content of surface hydroxyl groups and adsorbs a larger amount of 1-hexene than Ti-MFI-CH. These results pointed out that Ti-MFI-MW is more hydrophobic than Ti-MFI-CH. Epoxidation reactions of 1-hexene and styrene with hydrogen peroxide have been conducted to investigate catalytic properties of the Ti-MFI zeolites according to the synthesis method. The conversions and epoxide selectivities over Ti-MFI-MW are higher than those over Ti-MFI-CH due to the enhanced surface hydrophobicity.

KW - Epoxidation

KW - Hydrophobicity

KW - Microwave heating

KW - Modified hydrophobicity index

KW - Ti-MFI zeolite

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DO - 10.1016/j.cattod.2005.10.063

M3 - Conference article

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SN - 0920-5861

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EP - 372

JO - Catalysis Today

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ER -

Hydrophobicity and catalytic properties of Ti-MFI zeolites synthesized by microwave and conventional heating

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