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- Title
n-Octyltrichlorosilane Modified SAPO-34/PDMS Mixed Matrix Membranes for Propane/Nitrogen Mixture Separation.
- Authors
Cai, Weibin; Xie, Jiangyu; Luo, Jingyu; Chen, Xiaohan; Wang, Mingqian; Wang, Yujun; Li, Jiding
- Abstract
In this study, zeolite molecular sieve SAPO-34/polydimethylsiloxane (PDMS) mixed matrix membranes (MMMs) were prepared to recover propane. n-Octyltrichlorosilane (OTCS) was introduced to improve compatibility between SAPO-34 and PDMS, and enhance the separation performance of the MMMs. Physicochemical properties of the MMMs were characterized by scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD) and water contact angle (WCA). Results showed that, after modification, alkyl chains were successfully grafted onto SAPO-34 without changing its crystal structure, particles in the MMMs were evenly distributed in the base film, and the hydrophobicity of the MMMs was enhanced. Moreover, the effects of SAPO-34 filling content, operating pressure, and feed gas concentration on the separation performance was explored. This indicated that the modification with OTCS effectively enhanced the separation performance of SAPO-34/PDMS MMMs. When the filling content of modified SAPO-34 was 15%, the maximal separation factor of 22.1 was achieved, and the corresponding propane permeation rate was 101 GPU.
- Subjects
SEPARATION (Technology); FOURIER transform infrared spectroscopy; PROPANE; MOLECULAR sieves; SEPARATION of gases
- Publication
Separations (2297-8739), 2022, Vol 9, Issue 3, p64
- ISSN
2297-8739
- Publication type
Article
- DOI
10.3390/separations9030064