膜科学与技术

Position：Home >> Abstract

MFI zeolite membranes modified by different silanes and their performances for H2/CO2 separation

Authors： CHEN Dongdong, ZHANG Chun, HONG Zhou, GU Xuehong

Units： State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemistry and Chemical Engineering, Nanjing Tech University, Nanjing, 210009, China

KeyWords： MFI zeolite membrane; silane; CVD; H2/CO2 separation

ClassificationCode：TQ028.8

year,volume(issue):pagination： 2016,36(1):1-6

Abstract：

On-stream chemical vapor deposition (CVD) method was carried out to modify HMFI zeolite membranes, which were obtained by NH4+ ion exchange to improve their hydrogen selective separation performance. The influence of silane size on the separation performance was investigated by using tetraethoxysilane (TEOS), methyldiethoxysilane (MDES) and trimethylethoxysilane (TMES). The results indicated that TMES with smaller size could more easily diffuse into zeolitic pores. The membrane modified by TMES achieved much higher H2/CO2 separation factor up to 45.9 with H2 permeance about 1.43×10-7 mol/(m2?s?Pa) at 500 ℃. Mass spectrometry (MS) was used to analyze the cracking products of TMES in HMFI zeolitic pores and deposition mechanism of modification with silane was discussed.

Funds：

国家自然科学基金(21222602); 江苏省杰出青年基金项目(BK2012040); 江苏省六大人才高峰项目; 江苏省自然科学基金青年基金项目(BK20130915); 中国博士后科学基金面上项目(2012M521065)

AuthorIntro：

陈冬冬(1989-), 男, 河南商丘人, 在读硕士, 从事膜材料制备与应用. 通讯联系人

Reference：

[1] Momirlan M, Veziroglu T N. The properties of hydrogen as fuel tomorrow in sustainable energy system for a cleaner planet [J]. Int J Hydrogen Energy, 2005, 30(7):795 – 802.
[2] 陈长聘. 氢能未来与储氢金属材料技术 [J]. 氯碱工业, 2003, 5:1 – 3.
[3] Ockwig N W, Nenoff T M. Membranes for hydrogen separation [J]. Chem Rev, 2007, 107(10):4078 – 4110.
[4] 袁欣, 王明臣, 孙明峰, 等. 氢气变压吸附提纯单元改造探讨 [J]. 乙烯工业, 2010, 22(3):20 – 23.
[5] Bernhard D P, Rowles H C, Moss J A, et al. Increased olefins production via recovery of refinery gas hydrocarbons [R]. OSTI Identifier: 6533113, No. CONF-880319-, Washington, DC, NPRA, 1988.
[6] Adhikari S, Fernando S. Hydrogen membrane separation techniques [J]. Ind Eng Chem Res, 2006, 45(3):875 – 881.
[7] Masuda T, Fukumota N, Kitamura M, et al. Modification of pore size of MFI-type zeolite by catalytic cracking of silane and application to preparation of H2 separation zeolite membrane [J]. Micropor Mesopor Mater, 2001, 48(1/3):239 – 245.
[8] Hong M, Falconer J L, Noble RD. Modification of zeolite membranes for H2 separation by catalytic cracking of methyldieth oxysilane [J]. Ind Eng Chem Res, 2005, 44(11):4035 – 4041.
[9] Zhu X, Wang H, Lin Y S. Effect of the membrane quality on gas permeation and chemical vapor deposition modification of MFI-type zeolite membranes [J]. Ind Eng Chem Res, 2010, 49(20):10026 – 10033.
[10] Wang H, Lin Y S. Synthesis and modification of ZSM-5/silicalite bilayer membrane with improved hydrogen separation performance [J]. J Membr Sci, 2012, 396:128 – 137.
[11] Wang H, Lin Y S. Effects of synthesis conditions on MFI zeolite membrane quality and catalytic cracking deposition modification results [J]. Micropor Mesopor Mater, 2011, 142(2):481 – 488.
[12] Gu X H, Tang Z, Dong J H. On-stream modification of MFI zeolite membranes for enhancing hydrogen separation at high temperature [J]. Micropor Mesopor Mater, 2008, 111 (1):441 – 448.
[13] Hong Z, Sun F, Chen D D, et al. Improvement of hydrogen-separating performance by on-stream catalytic cracking of silane over hollow fiber MFI zeolite membrane [J]. Int J Hydrogen Energy, 2013, 38 (20):8409 – 8414.
[14] Hong Z, Wu Z J, Zhang Y T, et al. Catalytic cracking deposition of methyldiethoxysilane for modification of zeolitic pores in MFI/α-Al2O3 zeolite membrane with H+ ion exchange pretreatment [J]. Ind Eng Chem Res, 2013, 52(36), 13113 − 13119.
[15] 吴再娟, 洪周, 张玉亭, 等. MFI型分子筛膜晶内孔道的在线CVD调变 [J]. 南京工业大学学报, 2013, 35(4):43 – 47.

Service：

【Download】【Collect】

《膜科学与技术》编辑部 Address: Bluestar building, 19 east beisanhuan road, chaoyang district, Beijing; 100029 Postal code; Telephone：010-80492417/010-80485372; Fax：010-80485372 ; Email：mkxyjs@163.com