Oil Column Method for Magnetic Microspheres with Core-shell Structure

摘要：

　　Spherical alumina catalysts have been widely used in fluidized bed and slurry-bed or catalyst carrier due to their excellent pore structure,large surface area,good physical strength and resistance to acids and stability.Magnetic microspheres of γ-Fe2O3 @ Al2O3 with core-shell structure were obtained by γ-Fe2O3 magnetic core coating with aluminum sol.After aging,drying and calcinations process,microspheres with certain hardness and magnetic properties can be obtained.During the preparation of core-shell structure microspheres,effect of both the content of aluminum sol,hexamethylenetetramine(HMT),magnetic core γ-Fe2O3 and process parameters of shaping time,aging temperature,calcination temperature on the properties of the spherical carrier was investigated.The optimum properties of microsphere carrier for hardness of 36.32 N/mm,specific surface area of 89.016 m2/g,pore volume of 0.874 cm3/g and average pore diameter 18.51 nm were synthesized,respectively.

关键词： Spherical alumina γ-Fe2O3 magnetic core Oil column method Magnetic carrier

作者: Lianqing Yu Kaituo Dong Qianqian Zhi Mingjiang Cai

作者单位: Key Laboratory of New Energy Physics & Materials Science in Universities of Shandong(China Universit College of Science China University of Petroleum QingDao 266580, China

会议类型: 国际会议

会议名称: the Chinese Materials Congress 2012(2012年中国材料大会(CMC2012))

会议地点: 太原

会议语种:英文

页码: 677-680

在线出版日期: 2012-07-13（万方平台首次上网日期，不代表论文的发表时间）