正辛烷在NaY/β复合分子筛上的吸附扩散  

Adsorption and Diffusion of n-Octane on NaY/β Composite Zeolite

作　　者：赵华[1,2] 宋丽娟[1,2] 孙兆林[1,2] 秦玉才[2] 

机构地区：[1]中国石油大学化学工程学院,山东青岛266580 [2]辽宁石油化工大学石油化工催化科学与技术重点实验室,辽宁抚顺113001

出　　处：《石油学报（石油加工）》2015年第4期1022-1027,共6页Acta Petrolei Sinica(Petroleum Processing Section)

基　　金：国家重点基础研究发展计划"973"项目(2007CB216403);国家自然科学基金项目(21076100;21376114);辽宁省高校创新团队支持计划项目资助

摘　　要：采用频率响应(FR)和智能重量分析(IGA)技术考察了正辛烷在NaY、Hβ、NaY/β复合分子筛,以及NaY和Hβ质量比为1的机械混合物(记为NaY+β)上的吸附和扩散。结果表明,333K下,在79.99~133.32Pa范围内,正辛烷在4种分子筛上的吸附过程为其传质过程的速控步骤,并存在2种不同的吸附过程,FR响应强度值由大到小的吸附剂顺序为NaY、NaY+β、Hβ、NaY/β;大于399.97Pa时,扩散过程是主要的传质速控步骤,扩散系数由大到小的吸附剂顺序为NaY/β、NaY+β、NaY、Hβ。正辛烷与NaY分子筛的作用力明显强于其与Hβ、NaY/β和NaY+β的作用力。The frequency response （FR） and intelligent gravimetric analysis （IGA） techniques were applied to study adsorption and diffusion processes of n-octane on NaY zeolite, Hβ zeolite, NAY/β composite and mechanical mixture of NaY and Hβ zeolite with mass ratio of l（named NaY＋β）. On the four zeolites the adsorption of n-octane was found to he the rate-controlling step and there were two different adsorption processes at 333 K and the pressure in the range of 79.99- 133.32 Pa. Based on their response intensities from large to small, the four absorbents were in the order of NaY, NaY ＋ β, Hβ and NaY^ft. Diffusion of n-octane was the rate-controlling step under the pressure of more than 399.97 Pa, with the diffusion coefficiency descending in order of NaY/β, NaY＋β, NaY, Hβ. The interaction between n-octane and NaY zeolite was significantly stronger than that between n-octane and Hβ, NaY/β or NaY＋β.

关 键 词：正辛烷 复合分子筛 频率响应(FR) 智能重量分析(IGA) 吸附扩散 

分 类 号：TE626.21[石油与天然气工程—油气加工工程]