Nedeljkovic Dragutin
Department of Chemical Engineering, College of Engineering and Technology, American University of the Middle East, Egaila 15453, Kuwait.
Polymers (Basel). 2021 Jun 23;13(13):2053. doi: 10.3390/polym13132053.
An increased demand for energy in recent decades has caused an increase in the emissions of combustion products, among which carbon-dioxide is the most harmful. As carbon-dioxide induces negative environmental effects, like global warming and the greenhouse effect, a decrease of the carbon-dioxide emission has emerged as one of the most urgent tasks in engineering. In this work, the possibility for the application of the polymer-based, dense, mixed matrix membranes for flue gas treatment was tested. The task was to test a potential decrease in the permeability and selectivity of a mixed-matrix membrane in the presence of moisture and at elevated temperature. Membranes are based on two different poly(ethylene oxide)-based polymers filled with two different zeolite powders (ITR and IWS). An additive of detergent type was added to improve the contact properties between the zeolite and polymer matrix. The measurements were performed at three different temperatures (30, 60, and 90 °C) under wet conditions, with partial pressure of the water equal to the vapor pressure of the water at the given temperature. The permeability of carbon-dioxide, hydrogen, nitrogen, and oxygen was measured, and the selectivity of the carbon-dioxide versus other gases was determined. Obtained results have shown that an increase of temperature and partial pressure of the vapor slightly increase both the selectivity and permeability of the synthesized membranes. It was also shown that the addition of the zeolite powder increases the permeability of carbon-dioxide while maintaining the selectivity, compared to hydrogen, oxygen, and nitrogen.
近几十年来，能源需求的增加导致了燃烧产物排放的增加，其中二氧化碳是最有害的。由于二氧化碳会引发负面环境影响，如全球变暖和温室效应，减少二氧化碳排放已成为工程领域最紧迫的任务之一。在这项工作中，测试了基于聚合物的致密混合基质膜用于烟气处理的可能性。任务是测试在有水分和高温情况下混合基质膜的渗透性和选择性的潜在降低。膜基于两种不同的聚环氧乙烷基聚合物，并填充有两种不同的沸石粉末（ITR和IWS）。添加了洗涤剂类型的添加剂以改善沸石与聚合物基质之间的接触性能。测量在三种不同温度（30、60和90°C）的潮湿条件下进行，水的分压等于给定温度下水的蒸气压。测量了二氧化碳、氢气、氮气和氧气的渗透率，并确定了二氧化碳相对于其他气体的选择性。所得结果表明，温度和蒸汽分压的增加会略微提高合成膜的选择性和渗透率。还表明，与氢气、氧气和氮气相比，添加沸石粉末会增加二氧化碳的渗透率，同时保持选择性。
