Synthesis of SAPO-34 membranes and critical influence factors in microwave-assisted secondary growth

HAO Ahui; LIU Xiaohong; LIU Xiufeng; ZHANG Baoquan

doi:10.11949/j.issn.0438-1157.20160926

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Synthesis of SAPO-34 membranes and critical influence factors in microwave-assisted secondary growth

更新时间：2025-12-10

- Synthesis of SAPO-34 membranes and critical influence factors in microwave-assisted secondary growth
- CIESC Journal Issue 2, Pages: 716-722(2017)
- 作者机构：
  
  化学工程联合国家重点实验室, 天津大学化工学院,天津,300350
- 作者简介：
- 基金信息：
- DOI：10.11949/j.issn.0438-1157.20160926
  CLC： Q028.8
- Online First：05 February 2017，
  
  Published：05 February 2017
- 稿件说明：
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HAO Ahui, LIU Xiaohong, LIU Xiufeng, et al. Synthesis of SAPO-34 membranes and critical influence factors in microwave-assisted secondary growth[J]. CIESC Journal, 2017, (2): 716-722.
DOI：

HAO Ahui, LIU Xiaohong, LIU Xiufeng, et al. Synthesis of SAPO-34 membranes and critical influence factors in microwave-assisted secondary growth[J]. CIESC Journal, 2017, (2): 716-722. DOI： 10.11949/j.issn.0438-1157.20160926.

摘要

采用微波辅助二次生长法在α-Al2O3载体上合成了SAPO-34分子筛膜，并将其应用于CO2/CH4分离。通过扫描电镜、X射线衍射和傅里叶变换红外光谱等表征方法，系统考察了加热方式、晶种粒径、老化时间和晶化时间对SAPO-34分子筛膜表面形貌和结构的影响。实验结果表明，以0.4 μm分子筛作为晶种，在老化24 h，然后微波加热晶化4 h后可制备出厚度约为1.5 μm的致密、无缺陷SAPO-34分子筛膜，其平均CO2/CH4分离因子和CO2渗透率分别达到81和6.6×10-7 mol·m-2·s-1·Pa-1，制备方法可靠，重复性高。

Abstract

SAPO-34 membranes for separation of CO2/CH4 gas mixture were fabricated on porous α-Al2O3 substrates by seeded growth under microwave irradiation. Effects of synthesis conditions

including heating mode

seed size

aging and synthesis time

on membrane morphology and structure were investigated in order to manufacture dense and thin SAPO-34 membranes. Scanning electron microscopy (SEM)

X-ray diffraction (XRD)

and Fourier transform infrared spectroscopy (FT-IR) were used to characterize SAPO-34 membranes. 1.5 μm-thick defect-free SAPO-34 membrane could be obtained with high reproducibility at condition of 0.4 μm-sized seed

24 h aging

and 4 h microwave heating. The new membrane demonstrated an average CO2/CH4 separation selectivity at 81 and high CO2 permeability at 6.6×10-7 mol·m-2·s-1·Pa-1.

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