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题名: Influence of calcination temperature on the stability of fluorinated nanosized HZSM-5 in the methylation of biphenyl
作者: Wang, YN;  Guo, XW;  Zhang, C;  Song, FL;  Wang, XS;  Liu, HO;  Xu, XC;  Song, CS;  Zhang, WP;  Liu, XM;  Han, XW;  Bao, XH
通讯作者: Xinwen Guo
关键词: nanosized HZSM-5 ;  stability ;  fluorination ;  calcination temperature ;  dealuminum ;  methylation ;  biphenyl
刊名: CATALYSIS LETTERS
发表日期: 2006-03-01
DOI: 10.1007/s10562-006-0004-3
卷: 107, 期:3-4, 页:209-214
收录类别: SCI
文章类型: Article
部门归属: 5
项目归属: 502
产权排名: 3;9
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Chemistry, Physical
研究领域[WOS]: Chemistry
英文摘要: 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, Al-27 and Si-29 MAS-NMR. The effect of calcination temperature on the structure and acidity was studied in the range of 400-500 degrees 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 Bronsted 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 degrees C, the conversion of BP can keep at about 10% for 50 h. 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.
关键词[WOS]: SHAPE-SELECTIVE ALKYLATION ;  CATALYTIC-PROPERTIES ;  (NH4)(2)SIF6-MODIFIED ZSM-5 ;  DIRECT HYDROXYLATION ;  CRYSTAL SIZE ;  ZEOLITE ;  4-METHYLBIPHENYL ;  4,4'-DIMETHYLBIPHENYL ;  ISOPROPYLATION ;  MORDENITES
语种: 英语
原文出处: 查看原文
WOS记录号: WOS:000236114500013
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/98055
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Dalian Univ Technol, State Key Lab Fine Chem, Dalian 116012, Peoples R China
2.Penn State Univ, Energy Inst, University Pk, PA 16802 USA
3.Penn State Univ, Dept Energy & Geoenvironm Engn, University Pk, PA 16802 USA
4.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China

Recommended Citation:
Wang, YN,Guo, XW,Zhang, C,et al. Influence of calcination temperature on the stability of fluorinated nanosized HZSM-5 in the methylation of biphenyl[J]. CATALYSIS LETTERS,2006,107(3-4):209-214.
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