Gas and vapor separation process using surface-soaked liquid membrane

使用表面浸泡液膜的气体和蒸汽分离工艺

• 批准号: 17560659
• 负责人: ITO Akira
• 金额: $ 2.18万
• 依托单位: Niigata University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2005
• 资助国家: 日本
• 起止时间: 2005 至 2006
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-17560659/
• 关键词: liquid membrane; carbon dioxide; VOC; gas separation; microporous membrane; グリコール; 除湿; 膜分離

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.

将表面浸泡液膜应用于空气中二氧化碳和挥发性有机化合物的分离过程。基材为疏水微孔膜Durapel膜，表面采用电晕辐照技术处理。膜的上表面张力为54mN/m，下表面为21mN/m。这种对微孔膜表面性质的各向异性结构使得液膜结构能够在一个膜中。表面浸泡液膜能够适用于真空模式的气体和蒸汽渗透。开发了一种30 cm×30 cm的平板式膜组件，用于气体和蒸汽的分离。表面浸泡液膜在本研究中的主要应用是二氧化碳分离。双乙醇胺液膜对二氧化碳/氮气和二氧化碳/甲烷混合气体的分离系数均在20以上。将胺液膜应用于二氧化碳富气进料过程。该设备具有液膜组件和真空。泵可供二氧化碳浓度超过2000ppm的空气。为工艺设计建立了具有渗透性的工艺分析模型。这种富含二氧化碳的空气供给工艺将应用于人工照明的温室。将三甘醇液膜法应用于空气中VOC蒸气的脱除。该膜组件有效地去除了空气中的乙醇、甲醇、苯蒸气。三甘醇液膜对空气中VOC蒸气的分离系数大于1000。液膜法在降低VOC方面的应用也很有前景。

项目成果

Air-Sweep Vacuum Membrane Distillation Using Fine Silicone Rubber Hollow-Fiber Membranes

采用精细硅橡胶中空纤维膜的气扫真空膜蒸馏

• 发表时间: 2006
• 期刊: Desalination 191
• 作者: Jingli Xu;Michio Furusawa;Akira Ito
• 通讯作者: Akira Ito