使用中空纖維薄管膜塗佈胺基化SBA-15於二氧化碳分離之研究

Carbon dioxide separation by using hollow fiber membrane coated with the amino functionalized meso-porous silica (SBA-15-NH2)

潘建名(Chien-Ming Pan)

指導教授 ： 張淑美

國立臺北科技大學/工程學院/有機高分子研究所/碩士(2014年)

https://doi.org/10.6841/NTUT.2014.00154

摘要

我國環保署公告二氧化碳室內濃度超過800 ppm，容易使人疲倦或頭痛，為了改善室內二氧化碳濃度過高對人體的負面影響，本研究設計一個中空纖維薄膜氣體選擇的裝置系統應用於二氧化碳室內減量。
本研究以浸泡塗佈法修飾聚碸中空纖維薄膜的表面，透過可調控的方法在纖維膜表面產生氣體選擇層，浸泡液組成為聚乙烯醇與表面胺基改質的中孔洞材SBA-15-NH2，修飾後的中空纖維薄膜表面富含氫氧基和胺基之官能基，大大提升對二氧化碳氣體的吸附能力。表面修飾膜以掃描式電子顯微鏡(SEM)及X射線光電子能譜儀(XPS)鑑定分析。
進一步組裝以修飾後聚碸中空纖維薄膜製備的裝置系統，在室溫環境下，分別測試二氧化碳與氮氣的氣體滲透(GP)數值範圍，測試結果顯示，在較低的進氣壓力下，二氧化碳氣體具有較氮氣高的GP值。當浸泡液為0.5 wt% PVA+ 0.1 wt% SBA-15-NH2，改質之聚碸中空纖維薄膜於3.75 cmHg的進氣壓力下，二氧化碳與氮氣的GP值分別為1.1和0.2 (×10-3 cm3/s×cm2×cm-Hg)，其CO2/N2之氣體選擇比為5.6。

關鍵字

二氧化碳 ； 中空纖維 ； 孔洞性材料 ； 胺類

並列摘要

Carbon dioxide (CO2) is known as harmful gas. When the concentration of CO2 is up to 800 ppm indoors, it would make some people feel dizzy and uncomfortable. This study is to fabricate a hollow fiber gas separator system to reduce the CO2 concentration indoors.
In this study, a CO2 gas separation system is setup base on the membrane separation via the surface modification of commercial polysulfone (PSF) porous membranes to produce a gas selective layer. Dip coating method is applied to modify the surface of hollow fiber membrane with rich of hydroxyl and amine functional groups to enhance the CO2 gas absorption. Dip coat aqueous solution consists of polyvinyl-alcohol (PVA) and surface been amine modified meso-porous material SBA-15-NH2. The modified membranes were characterized by SEM and XPS analysis.
The gas separation results show that at lower input gas pressure, CO2 gas has larger gas permeability (GP) value than nitrogen at room temperature. When applying the dip coat condition of 0.5 wt% PVA and 0.1wt% SBA-15-NH2, the GP values are 1.1 and 0.2 (×10-3, cm3/s．cm2．cm-Hg) for CO2 and nitrogen at gas pressure of 3.75 cmHg respectively and the CO2/N2 gas selectivity ratio is 5.6.

並列關鍵字

Carbon dioxide ； Hollow fiber membrane ； porous material ； amine

參考文獻

[5] 張昊崴, 「平板式氟碳薄膜親疏水性對二氧化碳回收效能影響之研究」; 碩士論文，中原大學化學工程學系，2008。

[2] 許書唐, 「以平板式薄膜接觸器進行二氧化碳吸收之研究」；碩士論文，中原大學化學工程學系，2011。

[19] P. Singh, J. P.M. Niederer, G. F. Versteeg, “Structure and activity relationships for amine based CO2 absorbents—I”, International Journal of Greenhouse Gas Control ,Vol. 1, Issue 1, 2007, pp. 5-10

[3] J. W. Lee, R. Li, “Integration of fossil energy systems with CO2sequestration through NH4HCO3 production.”, Energy Conversion and Management.,vol. 44, 2003, pp. 1535–1546.

[7] Q. ZHANG, E.L. CLJSSLER, “Microporous hollow fibers for gas absorption : I. Mass transfer in the liquid.”, J.Membr. Sci.,vol. 23, 1985, pp. 321-332