請用此 Handle URI 來引用此文件:
http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/53600
標題: | 疏水陶瓷中空纖維管薄膜之製備、改質及其於二氧化碳捕捉之應用 Preparation and Hydrophobic Modification of Ceramic Hollow Fiber Membranes for CO2 capture application |
作者: | Tian-Shiun Huang 黃田薰 |
指導教授: | 童國倫 |
關鍵字: | 陶瓷中空纖維管,氧化鋁,二氧化碳捕捉,薄膜接觸器,FAS疏水改質, Ceramic hollow fiber membranes,aluminum oxide,carbon dioxide,membrane contactor,Fluoroalkylsilanes(FAS), |
出版年 : | 2015 |
學位: | 碩士 |
摘要: | 本研究旨在製備具高孔隙度、高比表面積之陶瓷中空纖維膜,並對陶瓷中空纖維膜進行疏水改質,最後製備成薄膜接觸器,應用於二氧化碳捕捉;於研究中將探討陶瓷中空纖維膜之製備方式與製備過程中的參數調整對結構產生之影響,及其於薄膜接觸器中捕捉二氧化碳之效能。 研究中以氧化鋁粉體做為前驅物製備出陶瓷中空纖維膜,在纖維紡製過程中以相轉換法製備出具有sponge-like以及finger-like之結構的中空纖維薄膜;於纖維紡製程序中,芯液流速、鑄膜液擠出壓力、紡嘴與絮凝槽之間的高度等參數皆可調整並對中空纖維膜之結構產生影響。當相轉換之速度增加時,使得鑄模液中NMP的濃度降低,並且中空薄膜內側的finger-like結構增加,sponge-layer的厚度從45%減少至33%;此外,芯液對薄膜內側具有拉伸的作用而影響薄膜壁厚,因此於高芯液流速時,可製備出較薄的中空纖維膜。於本研究中,藉由調整製備參數,製備出外側具有sponge-like和內側為finger-like之結構的中空纖維薄膜,以利於應用在二氧化碳捕捉實驗。 本研究以具有sponge-like和finger-like之結構的中空纖維薄膜,並搭配FAS疏水改質,使其得以應用於二氧化碳捕捉之實驗,薄膜外側的sponge-like可減少薄膜被液相端潤濕的問題,內側的finger-like可減少氣體通過薄膜的阻力;此外,因陶瓷中空纖維膜具70%孔隙度之特性,有利於提升二氧化碳捕捉效能至2.8 mmol/m2s。 The purpose of this study is preparing ceramic hollow fiber membranes with high porosity, high surface area in a small volume and using hydrophobic modification to prepare hollow fibers as a membrane contactor for the carbon dioxide capture. In this study concerned with the method for preparing ceramic hollow fiber membranes and the effect of the carbon dioxide removal efficient with ceramic hollow fiber membranes apply to the membrane contactor. This study is intended as an investigation of preparation of ceramic hollow fiber membranes by spinning process during phase inversion, in addition adding aluminum oxide as preconditioned particles. In spinning process of ceramic hollow fibers can adjust many parameters, such as air gap, injection rate of internal coagulant, nitrogen pressure on suspensions that will effect on the structure of hollow fibers. As speed of solvent/non-solvent phase inversion increase, the length of finger-like structure increase and the concentration of NMP decrease in suspensions. The sponge layer is from 45% to 33% that adjusted by injection rate of internal coagulant. Moreover wall thickness decrease as injection rate of internal increase because the injection rate of internal coagulant has a tensile stress works on inner surface of fibers. In this study can adjust parameters to make an asymmetric structure i.e., finger-like at inner walls and sponge-like structure at outer walls in order to improve efficient in capturing carbon dioxide. Further preparing the ceramic hollow fiber membranes with FAS hydrophobic modification apply to membrane contactor for the capture of carbon dioxide. The sponge-like structure at outer walls can prevent wetting from absorbents and finger-like at inner walls may provide low resistance of gas through fibers in carbon dioxide capture process. According to the result hollow fiber membranes can improve the efficiency of carbon dioxide capture in membrane contactor. The CO2 absorption flux of the FAS-modified hollow fibers reaches a high and stable value of approximately 2.8 mmol/m2s in long time operation. |
URI: | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/53600 |
全文授權: | 有償授權 |
顯示於系所單位: | 化學工程學系 |
文件中的檔案:
檔案 | 大小 | 格式 | |
---|---|---|---|
ntu-104-1.pdf 目前未授權公開取用 | 4.22 MB | Adobe PDF |
系統中的文件,除了特別指名其著作權條款之外,均受到著作權保護,並且保留所有的權利。