Gas and vapor separation process using surface-soaked liquid membrane

表面浸泡液膜应用于空气中二氧化碳和VOC蒸气的分离过程。基材为疏水性微孔膜，Durapel膜，Millipore，其表面经过电晕辐照技术处理。经处理的膜在顶表面具有54 mN/m的表面张力，而在底表面具有21 mN/m的表面张力。微孔膜表面性质的这种各向异性结构使得在一个膜中具有液膜结构。表面浸泡液膜能够应用于真空模式气体和水蒸气渗透。 30cm x 30cm 的平板式膜组件专为气体和蒸汽分离应用而开发。本研究中表面浸泡液膜的主要应用是二氧化碳分离。事实证明，含有二甘醇胺液体的液膜对于二氧化碳/氮气混合物和二氧化碳/甲烷混合物具有超过20的分离因子。胺液膜应用于富二氧化碳空气进料工艺。该设备配有液膜组件和真空。泵可输送二氧化碳浓度超过2000ppm的空气。开发了具有渗透性的过程的分析模型用于过程设计。这种富含二氧化碳的空气供给工艺将应用于具有人工照明的温室。三甘醇液体液膜工艺也应用于空气中VOC蒸气的去除工艺。该膜组件有效去除空气中的乙醇、甲醇、苯蒸气。三甘醇液膜对空气中VOC蒸气的分离因子超过1000。液膜工艺在VOC减排中的应用也将大有可为。

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.