Preparation of MFI zeolite membranes in fluoride media and separation performance for ethanol/water mixture

KONG Qingqing; ZHANG Chun; WANG Xuerui; GU Xuehong

doi:10.3969/j.issn.0438-1157.2014.12.056

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Preparation of MFI zeolite membranes in fluoride media and separation performance for ethanol/water mixture

更新时间：2025-12-10

- Preparation of MFI zeolite membranes in fluoride media and separation performance for ethanol/water mixture
- CIESC Journal Issue 12, Pages: 5061-5066(2014)
- 作者机构：
  
  南京工业大学化学化工学院, 材料化学工程国家重点实验室,江苏,南京,210009
- 作者简介：
- 基金信息：
- DOI：10.3969/j.issn.0438-1157.2014.12.056
  CLC： Q028.8
- Online First：05 December 2014，
  
  Published：05 December 2014
- 稿件说明：
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KONG Qingqing, ZHANG Chun, WANG Xuerui, et al. Preparation of MFI zeolite membranes in fluoride media and separation performance for ethanol/water mixture[J]. CIESC Journal, 2014, (12): 5061-5066.
DOI：

KONG Qingqing, ZHANG Chun, WANG Xuerui, et al. Preparation of MFI zeolite membranes in fluoride media and separation performance for ethanol/water mixture[J]. CIESC Journal, 2014, (12): 5061-5066. DOI： 10.3969/j.issn.0438-1157.2014.12.056.

摘要

以氟化铵为矿化剂、四丙基溴化铵为模板剂

在负载晶种的钇稳定氧化锆(YSZ)中空纤维支撑体表面合成了MFI型分子筛膜

并用于乙醇/水的分离;系统考察了氟硅比(nNH4F/nSiO2)、合成时间等条件对膜分离性能的影响

在nNH4F/nSiO2为0.8、合成时间为8 h下合成出高性能膜

其通量达8.2 kg·m-2·h-1、乙醇/水分离因子为47;同时研究了MFI型分子筛膜在乙醇/水体系中的分离稳定性

揭示出该方法所合成膜表面无Si—OH

从而避免了Si—OH与乙醇反应而带来膜分离性能的下降.

Abstract

MFI zeolite membranes were synthesized on seeded yttria stabilized zirconia (YSZ) hollow fiber substrates by using ammonium fluoride as mineralizing agent and tetrapropylammonium bromide as template. The as-synthesized membranes were tested for separation of ethanol/water mixture. The influences of nNH4F/nSiO2 ratio and synthesis time on separation performance were investigated. High-performance MFI zeolite membrane was synthesized at nNH4F/nSiO2=0.8 and synthesis time of 8 h

which showed a permeation flux of 8.2 kg·m-2·h-1 and ethanol/water separation factor of 47. The stability of MFI zeolite membranes in ethanol/water mixture was investigated. No Si—OH was detected on the surface of the as-synthesized MFI zeolite membranes

which could avoid decreased membrane separation performance by the reaction between Si—OH and ethanol.

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