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

	Influence of calcination temperature on the stability of fluorinated nanosized HZSM-5 in the methylation of biphenyl
	Wang, YN ; Guo, XW ; Zhang, C ; Song, FL ; Wang, XS ; Liu, HO ; Xu, XC ; Song, CS ; Zhang, WP ; Liu, XM
刊名	catalysis letters
	2006-03-01
卷号	107 期号:3-4 页码:209-214
关键词	nanosized HZSM-5 stability fluorination calcination temperature dealuminum methylation biphenyl
通讯作者	xinwen guo
产权排序	3;9
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.
WOS标题词	science & technology ; physical sciences
类目[WOS]	chemistry, physical
研究领域[WOS]	chemistry
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
收录类别	SCI
原文出处	true
语种	英语
WOS记录号	WOS:000236114500013
公开日期	2010-11-30
内容类型	期刊论文
源URL	[http://159.226.238.44/handle/321008/98055]
专题	大连化学物理研究所_中国科学院大连化学物理研究所
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
推荐引用方式 GB/T 7714	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.
APA	Wang, YN.,Guo, XW.,Zhang, C.,Song, FL.,Wang, XS.,...&Bao, XH.(2006).Influence of calcination temperature on the stability of fluorinated nanosized HZSM-5 in the methylation of biphenyl.catalysis letters,107(3-4),209-214.
MLA	Wang, YN,et al."Influence of calcination temperature on the stability of fluorinated nanosized HZSM-5 in the methylation of biphenyl".catalysis letters 107.3-4(2006):209-214.