Gas and vapor separation process using surface-soaked liquid membrane

将表面浸渍液膜应用于空气中CO2和VOC的分离过程。基础材料是疏水性微孔膜、Durapel膜、Millipore，其表面通过电晕照射技术进行处理。经处理的膜在顶表面中具有54 mN/m的表面张力，而在底表面中具有21 mN/m的表面张力。这种微孔膜表面性质上的各向异性结构使得液膜结构在一个膜中得以实现。表面浸渍液膜能够应用于真空模式的气体和水蒸气渗透。研制了一种30 cm × 30 cm的平板型膜组件，用于气体和蒸气分离应用。本研究中表面浸渍液膜的主要应用是二氧化碳的分离。以二甘醇胺为液体的液膜对二氧化碳/氮气混合物和二氧化碳/甲烷混合物的分离因子均超过20。将胺液膜应用于富二氧化碳空气进料过程。该设备具有液膜组件和真空.泵可以供给超过2000 ppm的富含二氧化碳的空气。建立了考虑渗透率影响的过程分析模型，用于过程设计.这种富含二氧化碳的空气供给过程将应用于具有人工照明的绿色房屋。将三甘醇液膜法应用于空气中挥发性有机化合物的脱除。该膜组件能有效地去除空气中的乙醇、甲醇、苯蒸气。三甘醇液膜对空气中挥发性有机化合物的分离系数大于1000。液膜法在降低VOC方面的应用也很有前景。

The surface-soaked liquid membrane was applied to separation processes of carbon dioxide and VOC vapors from air. The base material was a hydrophobic microporous membrane, Durapel membrane, Millipore, which surface was treated by a corona irradiation technique. The treated membrane had 54 mN/m surface tension in the top surface, while it had 21 mN/m surface tension in the bottom surface. This anisotropic structure on surface property of the microporous membrane enabled liquid membrane structure in one membrane. The surface-soaked liquid membrane was able to apply to a vacuum mode gas and vapor permeation. A flat type membrane module of 30cm x 30cm was developed for gas and vapor separation applications. Main application of the surface-soaked liquid membrane in this study was carbon dioxide separation. The liquid membrane with diglycolamine liquid proved having over 20 separation factor for carbon dioxide/nitrogen mixture and carbon dioxide/methane mixture. The amine liquid membrane was applied to a carbon dioxide enriched air feed process. The equipment with the liquid membrane module and a vacuum. pump could feed carbon dioxide enriched air of over 2000ppm. An analytical model of the process with permeability was developed for process design. This carbon dioxide enriched air feed process will be applied to a green house with artificial illumination. The liquid membrane process with triethylene glycol liquid was also applied to a removing process of VOC vapor from air. The membrane module was effectively removed ethanol, methanol, benzene vapors from air. The separation factor for VOC vapor over air was over 1000 for the triethylene glycol liquid membrane. The application of liquid membrane process to VOC reduction will be also promising.