NaA分子筛膜蒸气渗透脱除一氯甲烷中的痕量水.pdf

石油化
PETROCHEMICAL TECHNOLOGY
2012年第41卷第10期
NaA分子筛膜蒸气渗透脱除
氯甲烷中的痕量水
梅金凤,周志辉2,刘红,王金渠2
(1.武汉科技大学治金矿产资源高效利用与造块湖北省重点实验室,湖北武汉430081;
2.大连理工大学精细化工国家重点实验室,辽宁大连116012
[摘要」利用热浸渍提拉晶种法,在孔径为2~3um的多孔a-Al20陶瓷管載体上水热合成NaA分子筛膜,采用XRD和SEM等
方法对合成的膜进行表征。用NaA分子筛膜对水含量为0.252%(w)的一氯甲烷进行蒸气渗透分离,考察合成液配方、进料压
力和进料温虔等条件对NaA分子筛膜蒸气渗透分离性能的影响。实验结果表明,经3次水热合成得到致密、连续的NaA分子筛
膜,在合成液摩尔组成为1Al2O3:2SiO2:2Na-O:120H2O时制备的膜厚度为7~8um;室温下NaA分子筛膜的分离因数可达75
000:在进料压力为0.05~0.20MPa时,NaA分子筛膜对水的通量为0.147kg/(m2?h)。
L关键词」NaA分子筛膜;热浸渍提拉晶种法;蒸气渗透;脱水;一氯甲烷
L文章编号」1000~-8144(2012)10-1148-06
中图分类号」TQ028.8
文献标识码
Removal of Trace Water in Methane Chloride by Vapor Permeation Throug.
h
Zeolite NAA Membranes
Mei Jinfeng, Zhou Zhihu
(1. Hubei Key Laboratory for Eficient Utilization and Aglomeration of Metallur ic Mineral Resourees, Wuhan University of Science
and Technology, Wuhan Hubei 430081, China; 2. State Key Laboratory of Fine Chemicals, Dalian University of Technology
Dalian Liaoning 116012, China)
Abstractj Zeolite NAA membranes were prepared on a porous A-A1, O, support by hot dip-coating
seeding method and characterized by means of XRD and SEM. The membranes were applied to the
removal of trace water(0. 252%(w))in methane chloride through vapor permeation. The effects of
the molar composition of the synthezing solution, feed pressure and feed temperature on the vapor
permeation performance of the zeolite NAA membranes were investigated. The results indicate that the
NAA membranes prepared by three times of hydrothermal synthesis are continuous and compact. The
membrane thickness is in the range of 7-8 wm when the molar composition of the synthezing solution
is 1AL20; 2si02 2NA2O: 120H] O. The separation factor of water/methane chloride system with
the membranes is as high as 75 000 at room temperature. The water flux maintained 0.147 k/(m,.h)
when the feed pressure is in the range of005-0.20 Mpa
Keywords J zeolite NAA membrane; hot dip-coating seeding method; vapor permeation
dehydration methane chloride
沸石分子筛膜不仅具有一般无机膜具有的耐引起人们的关注4,尤其是NaA分子筛膜5]?。
高温、耐化学腐蚀、机槭强度大和不易溶胀等优
点,还具有些独特的化学性质,如分子筛晶体中
收稿日期]2012-04-24;[修改稿目期]2012-07-11
的阳离子可以交换、硅铝比可以调节、分子筛膜的
作者简介]梅金风(1987~),女,山东省德州市人,硕士生。
联系人:周志辉,电话13871294049,电郎 huihui20980
孔径分布均匀,因此具有优异的气体及液体分离性
能等。近年来,沸石分子筛膜的合成与研究越来越『基金项目国家自然科学基金项日(20606004)