底膜对脱硫用羟乙基纤维素复合膜性能的影响  

Influence of Support Layer on Desulfurization Performance of Composite Hydroxyethyl Cellulose Membrane: Effect of Additive Content

作　　者：渠慧敏[1] 孔瑛[1,2] 张玉忠[2] 杨金荣[1] 卢福伟[1] 史德青[1] 

机构地区：[1]中国石油大学(华东)重质油国家重点实验室,山东青岛266555 [2]天津工业大学巾空纤维膜材料与膜过程教育部重点实验室,天津300160

出　　处：《郑州大学学报（工学版）》2008年第4期28-32,共5页Journal of Zhengzhou University（Engineering Science）

基　　金：教育部新世纪优秀人才支持计划资助项目(NCET-06-0605);中国博士后科学基金资助项目(20070420119)

摘　　要：以聚偏氟乙烯为底膜材料,以羟乙基纤维素(HEC)为活性层材料,通过改变底膜铸膜溶液中添加剂的质量浓度,制备出不同的渗透汽化脱硫用HEC复合膜;用催化裂化汽油评价了复合膜的脱硫性能,并对汽油组分在底膜内的传质进行了简单分析.结果表明,添加剂的质量浓度增加,底膜平均孔径增加,孔隙率却稍有降低,但汽油组分在底膜内的传质系数增加.添加剂的浓度增加,HEC复合膜对硫化物的选择性先增加后降低,渗透性则先降低后增加,在添加剂含量1%时出现极值.The composite hydroxyethyl cellulose （HEC） membranes for gasoline desulfurization were prepared by using polylinylidene fluioride （PVDF） as the material of support layer and HEC as the material of active layer. The different composite HEC membranes were obtained by changing the content of additive in the casting solution. The desulfurization performance of these composite membranes was tested with fluid catalytic cracking gasoline ; the mass transport of gasoline components in the support layer was simply analyzed. The resuits show that the average pore radius of support .layer increased with the increasing content of additive and porosity slightly decreased. Also, the mass transfer coefficient of gasoline component increased in the support layer. The selectivity of the composite HEC membrane for sulfur - containing compounds first increased and then decreased, but permeation flux first decreased and then increased with the increasing content of additive, and both met polar values at 1%.

关 键 词：渗透汽化 汽油脱硫 底膜 传质 复合膜 

分 类 号：TE063[石油与天然气工程]