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Perspective on Gas Separation Membrane Materials from Process Economics Point of View
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2019-12-31 , DOI: 10.1021/acs.iecr.9b05975
Yong Ding 1
Affiliation  

Gas separation membranes are expected to play a significant role in green house reduction, renewable energy production, and energy savings for separations. However, newly developed membrane materials are constrained by the trade-off between selectivity and permeability and existing body of literature lacks the clear guidance on directions for the investigation. In this paper, we first systematically reviewed the effects of mixed gases and contaminants on membrane selectivities from gas transport mechanism. We then examined cascade membrane process design to achieve the desired product recovery and purity, utilizing two types of membranes and utilizing pressure ratio as the guidance to design the stages. From these examinations, we concluded that high membrane selectivity is critically needed, while high membrane permeability has limited impact for practical applications. Process design and economics for biogas purification was utilized as an example to demonstrate the need for high selectivity membranes. We further identified some gas separation applications that are critically in need of high membrane selectivities, such as CO2 capture from flue gases, and highlighted recent progress in membrane materials with high gas selectivities for these applications.

中文翻译:

从工艺经济学角度看气体分离膜材料

预计气体分离膜将在减少温室气体,生产可再生能源以及节省分离能源方面发挥重要作用。然而,新开发的膜材料受到选择性和渗透性之间折衷的限制,并且现有文献缺乏关于研究方向的明确指导。在本文中,我们首先系统地考察了混合气体和污染物对气体传输机理对膜选择性的影响。然后,我们使用两种类型的膜并利用压力比作为设计阶段的指导,研究了级联膜工艺设计以实现所需的产品回收率和纯度。从这些检查中,我们得出结论,迫切需要高膜选择性,高膜渗透性对实际应用的影响有限。以沼气净化的工艺设计和经济性为例来说明对高选择性膜的需求。我们进一步确定了一些需要高膜选择性的气体分离应用,例如一氧化碳2从烟道气中捕获,并着重介绍了在这些应用中具有高气体选择性的膜材料的最新进展。
更新日期:2020-01-01
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