Tuning the pore structure of plug-containing Al-SBA-15 by post-treatment and its selectivity for C16 olefin in ethylene oligomerization

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	Tuning the pore structure of plug-containing Al-SBA-15 by post-treatment and its selectivity for C16 olefin in ethylene oligomerization
	Lin, S. ; Shi, L. ; Zhang, H. ; Zhang, N. ; Yi, X. ; Zheng, A. ; & Li, X.
刊名	Microporous and Mesoporous Materials
	2013
期号	184 页码:151-161
关键词	Mesoporous materials Plug-containing Al-SBA-15 Structural adjustment Post-treatments
中文摘要	Al-SBA-15 containing plug structures inside straight channels have been hydrothermally synthesized through a one-step synthesis strategy in an environmentally friendly acid-free medium. The effects of steaming, alkali, and acid post-treatments on the structural properties were investigated by powder X-ray diffraction (XRD), nitrogen adsorption–desorption at 77 K, transmission electron microscopy (TEM), scanning electron microscopy (SEM), FT-IR spectrum, 27Al MAS NMR, and inductively coupled plasma (ICP) analyses. The presence of the plugs can significantly enhance structural stability against steaming or alkali post-treatments. Acid post-treatment can be a very simple and convenient technique for adjusting the textural properties of plug-containing Al-SBA-15, and especially for optimizing the accessibility to active sites. Acid post-treatment at the low temperatures of 313 and 323 K results in the formation of a larger specific surface area (905 m2/g) and pore volume (0.94 cm3/g) through an ‘‘open door’’ effect in the plugs, without eliminating any of the plugs from the channels. In particular, nearly half of the secondary micropores on the pore walls were preserved. In contrast, raising the acid post-treatment temperature further to 333 and 343 K caused a ‘‘closed doors’’ effect through the blockage of pores in the plugs by the extracted fragments. After loading with nickel, the catalyst exhibited a higher yield of C10+ olefins in ethylene oligomerization, and more importantly, after steaming and acid post-treatments at higher temperatures, the samples showed shape selectivity for the C16 olefin.
学科主题	多相催化转化
收录类别	SCI
语种	英语
公开日期	2014-03-25
内容类型	期刊论文
源URL	[http://ir.qibebt.ac.cn:8080/handle/337004/1700]
专题	青岛生物能源与过程研究所_多相催化转化团队
推荐引用方式 GB/T 7714	Lin, S.,Shi, L.,Zhang, H.,et al. Tuning the pore structure of plug-containing Al-SBA-15 by post-treatment and its selectivity for C16 olefin in ethylene oligomerization[J]. Microporous and Mesoporous Materials,2013(184):151-161.
APA	Lin, S..,Shi, L..,Zhang, H..,Zhang, N..,Yi, X..,...&& Li, X..(2013).Tuning the pore structure of plug-containing Al-SBA-15 by post-treatment and its selectivity for C16 olefin in ethylene oligomerization.Microporous and Mesoporous Materials(184),151-161.
MLA	Lin, S.,et al."Tuning the pore structure of plug-containing Al-SBA-15 by post-treatment and its selectivity for C16 olefin in ethylene oligomerization".Microporous and Mesoporous Materials .184(2013):151-161.