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首页> 外文期刊>Journal of Applied Polymer Science >Amine-impregnated natural zeolite as filler in mixed matrix membranes for CO2/CH4 separation
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Amine-impregnated natural zeolite as filler in mixed matrix membranes for CO2/CH4 separation

机译：胺浸渍的天然沸石作为CO 2 / CH4分离的混合基质膜中的填料

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Flat mixed matrix membranes (MMMs) comprising polysulfone and clinoptilolite-type natural zeolite were prepared by casting. Zeolite was modified with three alkylamines: ethanolamine (EA), bis(2-hydroxypropyl)amine (BHPA), and polyethylenimine (PEI) by the impregnation method. Impregnated zeolite samples were characterized by X-ray diffraction, Fourier transform infrared spectroscopy, and N-2 adsorption-desorption. The alkylamine loading extent determined by thermogravimetric analysis was 5.2, 4.8, and 8.5% for EA, BHPA, and PEI, respectively. Analyses of MMMs showed that the incorporation of impregnated zeolite affected the glass-transition temperature (T-g) and mixed-gas transport properties. In this regard, a decreasing trend of the T-g values from 185.5 degrees C for the polymeric membrane up to 176.6 degrees C for Clino-EA-based MMM was recorded. In addition, the gas separation performance was evaluated at two different feed pressures. At 50 psi, MMMs showed an enhancement up to 30% on the CO2 permeability (22.79 Barrer) and 55% on the CO2/CH4 selectivity (45.78) in comparison with the polymeric membrane (CO2 permeability 17.34 Barrer; CO2/CH4 selectivity 29.38). These values varied depending on the alkylamine, BHPA being the most selective. (c) 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 48286.
机译：通过铸造制备包含聚砜和Clinophtolite型天然沸石的扁平混合基质膜（MMM）。通过浸渍法用三种烷基胺：乙醇胺（EA），双（2-羟丙基）胺（BHPA）和聚乙烯亚胺（PEI）进行修饰。浸渍沸石样品的特征在于X射线衍射，傅里叶变换红外光谱和N-2吸附 - 解吸。通过热重分析确定的烷基胺负载量分别为EA，BHPA和PEI的5.2,4.8和8.5％。 MMM的分析表明，浸渍沸石的掺入影响了玻璃化转变温度（T-G）和混合气体传输性能。在这方面，记录了基于基于Clino-EA的MMM的聚合物膜的185.5℃的T-G值从185.5℃的T-G值的降低。此外，在两种不同的进料压力下评估气体分离性能。在50psi下，与聚合物膜（CO2渗透率17.34除了29.38）相比，MMMS在CO 2渗透率（22.79个禁止物）上高达30％的增强率为高达30％的增强，高达30％，55％（45.78）; CO2 / CH4选择性29.38） 。这些值根据烷基胺而变化，BHPA是最选择性的。 （c）2019 Wiley期刊，Inc.J.Phill。聚合物。 SCI。 2019,136,48286。

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