%0 Journal Article
%T Adsorption and Diffusion Behavior of n-Butane and Butene-1 on ZSM-5 Zeolite with Different Si/Al Ratios and Temperatures<br>正丁烷和丁烯-1在不同Si/Al比ZSM-5分子筛上的吸附和扩散行为
%A WANG Fei
%A WANG Wen-chuan
%A HUANG Shi-ping
%A TENG Jia-wei
%A XIE Zai-ku
%A <br>王斐
%A 汪文川
%A 黄世萍
%A 滕加伟
%A 谢在库
%J 过程工程学报
%D 2007
%I 
%X Adsorption and diffusion behavior of C4 fractions (n-butane and butene-1) on special shape-selective and acidic ZSM-5 zeolite with different Si/Al ratios, which is used as catalyst in olefins catalytic cracking (OCC) technology, was investigated using an intelligent gravimetric analysis apparatus (IGA-003, HIDEN) at 275, 288 and 300 K. The double Langmuir model was applied to simulate the adsorption of n-butane and butene-1 on ZSM-5 zeolite samples. The diffusion coefficients of n-butane and butene-1 were correlated in terms of the Fick diffusion model. The results indicate that the diffusion of n-butane and butene-1on ZSM-5 zeolites are intracrystalline diffusion, and the diffusion coefficients are of the order of magnitude 10-14 m2/s. In addition, the diffusion coefficients of n-butane are larger than those of butene-1 on ZSM-5 zeolites at the same temperature and pressure. Moreover, the diffusion coefficients of n-butane and butene-1 on ZSM-5 zeolites all increase with temperature, and increase with pressure first and decrease at high pressure. In addition, the diffusion coefficients of n-butane all increase with the Si/Al ratio. The results are applicable in the C4 olefins catalytic cracking technology.
%K n-butane
%K butene-1
%K ZSM-5 zeolite
%K Si/Al ratio
%K adsorption isotherm
%K diffusion coefficient<br>正丁烷
%K 丁烯-1
%K ZSM-5分子筛
%K 硅/铝比
%K 吸附等温线
%K 扩散系数
%K 正丁烷
%K 丁烯
%K 分子筛
%K 吸附模型
%K 扩散行为
%K Different
%K Zeolite
%K Diffusion
%K Behavior
%K Adsorption
%K 工程数据
%K 相关
%K 样品
%K 平衡压力
%K 体系
%K 温度
%K 扩散速率
%K 体扩散
%K 结果
%K 扩散系数
%K 关联
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=3FCF8B1A330466D5&jid=B9EE12934D19905403D996AE65CEEEED&aid=93166F0ADF98DAA05C0D85EE46E55514&yid=A732AF04DDA03BB3&vid=DF92D298D3FF1E6E&iid=E158A972A605785F&sid=8DDBA6455F2E3ECF&eid=06DAE5E1DF7D0B6A&journal_id=1009-606X&journal_name=过程工程学报&referenced_num=2&reference_num=18