Influence of calcination temperature on the stability of fluorinated nanosized HZSM-5 in the methylation of biphenyl

Yanan Wang; Xinwen Guo; Chen Zhang; Fengling Song; Xiangsheng Wang; Hai Ou Liu; Xiaochun Xu; Chunshan Song; Weiping Zhang; Xiumei Liu; Xiuwen Han; Xinhe Bao

doi:10.1007/s10562-006-0004-3

Influence of calcination temperature on the stability of fluorinated nanosized HZSM-5 in the methylation of biphenyl

Yanan Wang
, Xinwen Guo
, Chen Zhang
, Fengling Song
, Xiangsheng Wang
, Hai Ou Liu
, Xiaochun Xu
, Chunshan Song
, Weiping Zhang
, Xiumei Liu
, Xiuwen Han
, Xinhe Bao

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

25 Scopus citations

Abstract

A series of fluorinated nanosized HZSM-5 catalysts were prepared by impregnating the zeolite with NH₄F solution. The samples were characterized by XRD, XRF, FTIR-Py, TPD, ²⁷Al and ²⁹Si MAS-NMR. The effect of calcination temperature on the structure and acidity was studied in the range of 400-500°C. When the calcination temperature increases, more framework aluminum atoms are removed due to the fluorination. As a result, the number of acid sites and the acid strength decrease, but the ratio of the total Brönsted acid sites to the total Lewis acid sites (B_T/L_T) increases. The fluorinated nanosized HZSM-5 catalysts exhibit better stability in the methylation of biphenyl (BP) with methanol. Moreover, the stability increases with the increase of the calcination temperature. When the fluorinated nanosized HZSM-5 is calcined at 500°C, the conversion of BP can keep at about 10% for 50h. The enhancement of stability may be due to the decrease of the acid strength and the increase of the ratio of B_T/L_T.

Original language	English (US)
Pages (from-to)	209-214
Number of pages	6
Journal	Catalysis Letters
Volume	107
Issue number	3-4
DOIs	https://doi.org/10.1007/s10562-006-0004-3
State	Published - Mar 2006

All Science Journal Classification (ASJC) codes

Catalysis
General Chemistry

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10.1007/s10562-006-0004-3

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@article{f9a21a9eb6e247d581f11d0cb7193c6d,

title = "Influence of calcination temperature on the stability of fluorinated nanosized HZSM-5 in the methylation of biphenyl",

abstract = "A series of fluorinated nanosized HZSM-5 catalysts were prepared by impregnating the zeolite with NH4F solution. The samples were characterized by XRD, XRF, FTIR-Py, TPD, 27Al and 29Si MAS-NMR. The effect of calcination temperature on the structure and acidity was studied in the range of 400-500°C. When the calcination temperature increases, more framework aluminum atoms are removed due to the fluorination. As a result, the number of acid sites and the acid strength decrease, but the ratio of the total Br{\"o}nsted acid sites to the total Lewis acid sites (BT/LT) increases. The fluorinated nanosized HZSM-5 catalysts exhibit better stability in the methylation of biphenyl (BP) with methanol. Moreover, the stability increases with the increase of the calcination temperature. When the fluorinated nanosized HZSM-5 is calcined at 500°C, the conversion of BP can keep at about 10\% for 50h. The enhancement of stability may be due to the decrease of the acid strength and the increase of the ratio of BT/LT.",

author = "Yanan Wang and Xinwen Guo and Chen Zhang and Fengling Song and Xiangsheng Wang and Liu, \{Hai Ou\} and Xiaochun Xu and Chunshan Song and Weiping Zhang and Xiumei Liu and Xiuwen Han and Xinhe Bao",

year = "2006",

month = mar,

doi = "10.1007/s10562-006-0004-3",

language = "English (US)",

volume = "107",

pages = "209--214",

journal = "Catalysis Letters",

issn = "1011-372X",

publisher = "Kluwer Academic Publishers",

number = "3-4",

}

TY - JOUR

T1 - Influence of calcination temperature on the stability of fluorinated nanosized HZSM-5 in the methylation of biphenyl

AU - Wang, Yanan

AU - Guo, Xinwen

AU - Zhang, Chen

AU - Song, Fengling

AU - Wang, Xiangsheng

AU - Liu, Hai Ou

AU - Xu, Xiaochun

AU - Song, Chunshan

AU - Zhang, Weiping

AU - Liu, Xiumei

AU - Han, Xiuwen

AU - Bao, Xinhe

PY - 2006/3

Y1 - 2006/3

N2 - A series of fluorinated nanosized HZSM-5 catalysts were prepared by impregnating the zeolite with NH4F solution. The samples were characterized by XRD, XRF, FTIR-Py, TPD, 27Al and 29Si MAS-NMR. The effect of calcination temperature on the structure and acidity was studied in the range of 400-500°C. When the calcination temperature increases, more framework aluminum atoms are removed due to the fluorination. As a result, the number of acid sites and the acid strength decrease, but the ratio of the total Brönsted acid sites to the total Lewis acid sites (BT/LT) increases. The fluorinated nanosized HZSM-5 catalysts exhibit better stability in the methylation of biphenyl (BP) with methanol. Moreover, the stability increases with the increase of the calcination temperature. When the fluorinated nanosized HZSM-5 is calcined at 500°C, the conversion of BP can keep at about 10% for 50h. The enhancement of stability may be due to the decrease of the acid strength and the increase of the ratio of BT/LT.

AB - A series of fluorinated nanosized HZSM-5 catalysts were prepared by impregnating the zeolite with NH4F solution. The samples were characterized by XRD, XRF, FTIR-Py, TPD, 27Al and 29Si MAS-NMR. The effect of calcination temperature on the structure and acidity was studied in the range of 400-500°C. When the calcination temperature increases, more framework aluminum atoms are removed due to the fluorination. As a result, the number of acid sites and the acid strength decrease, but the ratio of the total Brönsted acid sites to the total Lewis acid sites (BT/LT) increases. The fluorinated nanosized HZSM-5 catalysts exhibit better stability in the methylation of biphenyl (BP) with methanol. Moreover, the stability increases with the increase of the calcination temperature. When the fluorinated nanosized HZSM-5 is calcined at 500°C, the conversion of BP can keep at about 10% for 50h. The enhancement of stability may be due to the decrease of the acid strength and the increase of the ratio of BT/LT.

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U2 - 10.1007/s10562-006-0004-3

DO - 10.1007/s10562-006-0004-3

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JO - Catalysis Letters

JF - Catalysis Letters

IS - 3-4

ER -

Influence of calcination temperature on the stability of fluorinated nanosized HZSM-5 in the methylation of biphenyl

Abstract

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