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各种天然气污染物暴露对聚酰亚胺膜进行CO/CH分离的影响。

The Impact of Various Natural Gas Contaminant Exposures on CO/CH Separation by a Polyimide Membrane.

作者信息

Nemestóthy Nándor, Bakonyi Péter, Lajtai-Szabó Piroska, Bélafi-Bakó Katalin

机构信息

Research Group on Bioengineering, Membrane Technology and Energetics, University of Pannonia, 8200 Veszprém, Hungary.

出版信息

Membranes (Basel). 2020 Oct 31;10(11):324. doi: 10.3390/membranes10110324.

DOI:10.3390/membranes10110324
PMID:33142876
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7692088/
Abstract

In this study, hollow fibers of commercial polyimide were arranged into membrane modules to test their capacity and performance towards natural gas processing. Particularly, the membranes were characterized for CO/CH separation with and without exposure to some naturally occurring contaminants of natural gases, namely hydrogen sulfide, dodecane, and the mixture of aromatic hydrocarbons (benzene, toluene, xylene), referred to as BTX. Gas permeation experiments were conducted to assess the changes in the permeability of CO and CH and related separation selectivity. Compared to the properties determined for the pristine polyimide membranes, all the above pollutants (depending on their concentrations and the ensured contact time with the membrane) affected the permeability of gases, while the impact of various exposures on CO/CH selectivity seemed to be complex and case-specific. Overall, it was found that the minor impurities in the natural gas could have a notable influence and should therefore be considered from an operational stability viewpoint of the membrane separation process.

摘要

在本研究中，将商用聚酰亚胺中空纤维制成膜组件，以测试其对天然气处理的能力和性能。具体而言，对膜进行了表征，考察其在有和没有暴露于一些天然气中天然存在的污染物（即硫化氢、十二烷以及芳烃混合物（苯、甲苯、二甲苯），简称BTX）的情况下对CO/CH4分离的性能。进行了气体渗透实验，以评估CO和CH4渗透率的变化以及相关的分离选择性。与原始聚酰亚胺膜的性能相比，所有上述污染物（取决于其浓度以及与膜的接触时间）都会影响气体的渗透率，而各种暴露对CO/CH4选择性的影响似乎很复杂且因情况而异。总体而言，发现天然气中的微量杂质可能会产生显著影响，因此应从膜分离过程的操作稳定性角度加以考虑。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/eb1e/7692088/7a4edc78dc04/membranes-10-00324-g010.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/eb1e/7692088/e979a8c57a23/membranes-10-00324-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/eb1e/7692088/36d40b7609d0/membranes-10-00324-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/eb1e/7692088/01ae2410eabd/membranes-10-00324-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/eb1e/7692088/340f84bebbb1/membranes-10-00324-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/eb1e/7692088/6a044d1f9bba/membranes-10-00324-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/eb1e/7692088/7a4edc78dc04/membranes-10-00324-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/eb1e/7692088/f535f89a5094/membranes-10-00324-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/eb1e/7692088/16e42910ce87/membranes-10-00324-g002.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/eb1e/7692088/5444a9d5a7a1/membranes-10-00324-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/eb1e/7692088/e979a8c57a23/membranes-10-00324-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/eb1e/7692088/36d40b7609d0/membranes-10-00324-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/eb1e/7692088/01ae2410eabd/membranes-10-00324-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/eb1e/7692088/340f84bebbb1/membranes-10-00324-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/eb1e/7692088/6a044d1f9bba/membranes-10-00324-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/eb1e/7692088/7a4edc78dc04/membranes-10-00324-g010.jpg

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