Preparation of Nano-sized Silica-alumina Support by Supersolubilizing Self-assembly Technique  

作　　者：Liu Yan Zhao Shanlin Li Ping Jin Yingjie Zhang Xin Zhai Yuchun 

机构地区：[1]School of Material ＆ Metallurgy, Northeastern University, Shenyang 110004 [2]Liaoning Shihua University

出　　处：《China Petroleum Processing & Petrochemical Technology》2011年第1期32-37,共6页中国炼油与石油化工（英文版）

基　　金：the financial support of Liaoning Province National Science Fund (No.20072009)

摘　　要：Nano-sized silica-alumina particles were in-situ synthesized in supersolubilizing reverse micellae.Both the most probable pore diameters and the particle sizes were distributed in nano-scale SiO2-Al2O3 particulates.The influence of SiO2/Al2O3 mass ratio and the surfactant content on the particle size and morphology,pore structure,and acidity was characterized by the low temperature nitrogen adsorption/desorption (BET),SEM,TEM and NH3-TPD methods.The test results indicated that the most probable pore diameter of SiO2-Al2O3 nanoparticles was around 10 nm,the specific surface area was about 223-286 m2 /g,the pore volumes were about 0.48-0.63 cm 3 /g,and the particle sizes of porous SiO2-Al2O3 calcined at 550 ℃ were distributed always in the range between 10 nm to 50 nm.The calcined SiO2-Al2O3 nano-powders showed their acidity being stronger than the porous γ-Al2O3 support.Nano-sized silica-alumina particles were in-situ synthesized in supersolubilizing reverse micellae.Both the most probable pore diameters and the particle sizes were distributed in nano-scale SiO2-Al2O3 particulates.The influence of SiO2/Al2O3 mass ratio and the surfactant content on the particle size and morphology,pore structure,and acidity was characterized by the low temperature nitrogen adsorption/desorption （BET）,SEM,TEM and NH3-TPD methods.The test results indicated that the most probable pore diameter of SiO2-Al2O3 nanoparticles was around 10 nm,the specific surface area was about 223-286 m2 /g,the pore volumes were about 0.48-0.63 cm 3 /g,and the particle sizes of porous SiO2-Al2O3 calcined at 550 ℃ were distributed always in the range between 10 nm to 50 nm.The calcined SiO2-Al2O3 nano-powders showed their acidity being stronger than the porous γ-Al2O3 support.

关 键 词：supersolubility NANOPARTICLE SELF-ASSEMBLY porous silica-alumina 

分 类 号：TQ133.1[化学工程—无机化工] TB333[一般工业技术—材料科学与工程]