SiO2-Al2O3 composite oxides with hierarchical pores as solid acid catalysts for tetrahydrofuran polymerization
SiO2-Al2O3 composite oxides with hierarchical pores as solid acid catalysts for tetrahydrofuran polymerization
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分级孔SiO2-Al2O3复合氧化物作为四氢呋喃聚合固体酸催化剂
DOI:
10.1134/s0023158413060177
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发表时间:
2013-11
影响因子:
1.1
通讯作者:
Yong Xiang Zhao
中科院分区:
文献类型:
--
作者:
Yuan Yuan Ge;Zhi Qi Jia;Chun Guang Gao;Li Li Zhao;Hai Tao Li;Yin Zhang;Yong Xiang Zhao
A series of SiO2-Al2O3 composite oxides with different parameters of porous structure was synthesized via sol-gel process at a systematically varied pH (pH 2, 5, 7, 9, 11, 13), and characterized by transmission electron microscope, N2 adsorption-desorption measurements, X-ray powder diffraction, Fourier transform infrared spectroscopy, temperature-programmed desorption of ammonia and IR spectra of pyridine adsorption. The catalytic performance of SiO2-Al2O3 was investigated in the catalytic polymerization of tetrahydrofuran. All the SiO2-Al2O3 oxides are characterized by similar acidity but different porous properties. In the pH range of 7 to 9, the hierarchical pore system composed of mesopores and macropores is formed. Due to an enhanced accessibility of acid sites and easier diffusion of reacting molecules, the samples containing a hierarchical pore system of the catalysts show the highest yield of polytetrahydrofuran (about 48%) and an improved number-average molecular weight (Mn).
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DOI:
10.3390/molecules15031398
发表时间:
2010-03-08
期刊:
Molecules (Basel, Switzerland)
影响因子:
--
作者:
Aouissi A;Al-Deyab SS;Al-Shahri H
通讯作者:
Al-Shahri H
影响因子:
7.3
作者:
Devassy, BM;Halligudi, SB
通讯作者:
Halligudi, SB
影响因子:
3
作者:
T. Setoyama;T. Ookoshi;I. Ono;M. Kobayashi;Y. Kabata;T. Kawai;Akio Nakanishi;H. Takeo
通讯作者:
T. Setoyama;T. Ookoshi;I. Ono;M. Kobayashi;Y. Kabata;T. Kawai;Akio Nakanishi;H. Takeo
影响因子:
10.9
作者:
朱晴;梁丽萍;贾志奇;高春光;赵永祥
通讯作者:
朱晴;梁丽萍;贾志奇;高春光;赵永祥
影响因子:
5.2
作者:
Jiajun Zheng;Xiwen Zhang;Yan Zhang;Jinghong Ma;Ruifeng Li
通讯作者:
Jiajun Zheng;Xiwen Zhang;Yan Zhang;Jinghong Ma;Ruifeng Li