Preparation of SiO2 model catalyst and its application in research of diffusion coefficient of residue

摘要：

Spherical Model catalysts of 4 mm were prepared by firstly ordered packing of monodisperse 200～500nm silica spheres, which were prepared through hydrolysis and condensation of alkoxysilanes, and then calcining at 800 . Then micropores of the monodisperse silica spheres were vanished and the mechanical strength ℃ was increased during the calcining process. Owing to the uniform size of the silica spheres, the prepared model catalysts had uniform interstitial pores, which can be tuned by change the diameter of the monodisperse silica particles. Using the model catalyst prepared by 300nm silica particles, the diffusion coefficient of a fraction of Dagang residue was determined and founded to be 7.54×10-10 m2/s.

关键词： Colloidal silica momodispers model catalyst diffusion coefficient residue

作者: 刘子媛 陈胜利 董鹏

作者单位: 中国石油大学 重质油国家重点实验室,北京102249;中国石油大学化学化工学院,山东东营257061 中国石油大学 重质油国家重点实验室,北京102249

会议类型: 国际会议

会议名称: 第六届中国国际纳米科技研讨会

会议地点: 成都

会议语种:英文

在线出版日期: 2007-11-19（万方平台首次上网日期，不代表论文的发表时间）