2026-11-092026-11-09https://scholars.csmu.edu.tw/handle/123456789/38713More recently, it was recognized that the release of the so-called “greenhouse” gases, CO2, CH4 and chlorofluorocarbons, may adversely influence global weather patterns. The primary sources of greenhouse gas emissions are the combustion of fossil fuels such as coal or natural gas for the production of electricity, and liquid fossil fuels for transportation purposes. Several options exist to reduce these CO2 emissions, including the substitution of nuclear power for fossil fuels, increasing the efficiency of fossil plants, the substitution of natural gas for coal, and separating and capturing the CO2 prior to emission into the atmosphere, but each has economic, technical or societal limitations. It is inevitable, therefore, that separation technologies will become increasingly important in the field of environmentally acceptable energy production and conversion. Several gas separation techniques exist which could be considered for energy-related applications. Significant amongst these techniques are: cryogenic separation, absorption processes, adsorption processes and membrane separations. The last one decade has seen a tremendous growth in research activities and commercial applications of molecular sieving based gas separation processes. Recent efforts to achieve economical and efficient membranes for various uses have resulted in a selection of new materials, in improvement in membrane preparation techniques to produce thinner, defect-free membranes. At present, the interest is derived toward inorganic membranes due to their superior permeability-selectivity combination than polymeric membranes and suitable performance for high temperature or corrosive environment. Different studies on carbon membranes have shown that these materials successfully compete with polymeric membranes and other porous organic membranes, such as silica- and zeolites-based membranes, in separation processes of industrial interest. The carbon molecular sieve membranes (CMS membranes) contain pores that approach the molecular dimensions of the gases (<4 Å) and exhibit selectivity according to the size and shape of the molecules. The CMS membranes separate effectively gas molecules with similar size (O2/N2, CO2/N2, CO2/CH4, etc.) Soffer and koresh first synthesized a MS membrane by the pyrolysis of organic precursors that gave good separation of gases. Since then various researchers have studied the effect of precursor selection, polymeric membrane preparation conditions, pretreatment of the precursor, pyrolysis conditions, post-treatment of pyrolysed membranes and module construction on CMS separation properties. Recently, the researches are pay attention to synthesized nanoporous synthesis carbon film. In the present work, we report on a new approach to the preparation of CMS membrane containing (1) nanoporous material, and (2) nano-sized metal powder, which are considered to cause a spacer effect and a steric hindrance into the carbon matrix, and increased the gas permselectivity. Finally, (3) the carbon nanocomposite thin films are employed in the catalytic membrane for VOC oxidation.近年來，由於所謂的“溫室效應＂氣體的大量排放，如二氧化碳、甲烷、氟氯碳化物等， 已嚴重地影響全球氣候型態。溫室效應氣體的主要排放源多來自於石化燃料，如使用煤、天然 氣的發電業、使用液態石化燃料的工業與運輸業等三大類別。各國為因應溫室效應亦訂定了數 點關於二氧化碳排放減量之政策，如（1）新能源開發以替代非清潔能源；（2）節約能源、提 昇能源使用效率；（3）改變製程；（4）產業轉型及（5）二氧化碳的分離與捕集等。其中，（1） ~（4）項由於有經濟效益、技術可行性或社會發展等限制而無法於短時間內達到排放減量目 的。因此就“分離技術”的角度來管制二氧化碳的排放將是短時程內較為可行的方法。 氣體分離技術包含有：低溫分離、吸收程序、吸附程序及薄膜分離等。其中後者於近年來 於研究領域顯得相當活躍而引起廣泛注意，且基於分子篩選基礎之氣體分離程序更被視為具有 商業化發展潛力之薄膜。 常用於氣體分離的無機薄膜由於一般具有耐高壓、高溫及化學安定性等優點，因此較有機 薄膜更適於複雜環境之應用且生命週期長，其材質有：金屬、陶瓷（氧化鋁、氧化矽）、矽、 沸石和碳分子篩選薄膜等。其中，沸石具有微孔結構，可分離同分異構物，但沸石晶體要製備 成連續的薄膜較困難，且價格昂貴也較不耐酸鹼及高溫環境。以矽所製備出的薄膜可有效分離 氫氣，但沒法分離尺寸相似的氣體分子（如O2/N2 氣體分子對）。而以碳結構所製備出來的碳 分子篩選薄膜之發展雖始於近十幾年，然其擁有接近氣體分子維度之尺寸（<4 Å），故與矽和 沸石材質所製備出的薄膜相比時，則對氣體分子展現出極佳的選擇性，而可有效分離尺寸相當 接近之氣體分子，如O2/N2，CO2/N2，CO2/CH4 等。 自Soffer 與Koresh 於1983 年由裂解高分子前驅物合成對氣體分離具良好性質的碳分子篩 選薄膜至今，多數的研究皆著重於探討前驅物的選擇、高分子膜製備條件、前驅物的前處理、 熱裂解條件、裂解後薄膜的後處理及膜組的建構等因子對碳分子篩選薄膜特性的影響，使得碳 膜的製備技術已漸臻於成熟。故未來的發展趨勢，將是著重於如何更有效的同時提升碳分子篩 選薄膜對氣體的滲透率與選擇率。 本計劃共訂定三年研究主題，第一年之研究著重於添加奈米多孔隙材料至碳分子篩選薄膜 中，藉由碳膜與多孔材間微孔結構的生成，增加氣體的滲透率；本計劃第二年之研究重點，即 在添加奈米金屬粉末作為碳膜的功能性改質劑，藉由(1)金屬粒子與氣體分子間不同的吸附能 力、(2)熱裂解後於金屬粒子與碳膜基質間所形成的gap 以改善碳分子篩選薄膜的滲透選擇率； 在本計劃第三年，將評估奈米複合碳分子篩選薄膜結合催化反應層，應用於催化型薄膜反應器 之可行性。奈米多孔材料奈米金屬粉末分子篩選奈米複合薄膜氣體分離Nanoporpous materialNano-metal powderMolecular sievingNanocomposite membraneProject