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標題: 奈米碳管、活性碳與沸石吸附二氧化碳溫室氣體之研究
A Study on the Adsorption of Carbon Dioxide From Air Streams by Carbon Nanotubes, Activated Carbon and Zeolite
作者: 吳碧蓮
Wu, Pi-Lien
關鍵字: carbon nanotubes;溫室氣體;MEA;NH3(aq);APTS;CO2;二氧化碳;奈米碳管;MEA;NH3(aq);APTS
出版社: 環境工程學系所
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經APTS處理過之吸附劑物化特性皆有所改變,包括表面官能基與鹼基增加,因此提高二氧化碳吸附量。等溫吸附結果顯示,50%二氧化碳進流濃度時,未經表面處理奈米碳管、活性碳與沸石最大吸附容量分別為69.2、73與63.4 mg/g。經APTS表面處理後吸附容量分別為96.3 、79.5與82.4 mg/g。顯示CNT(APTS)具有最佳二氧化碳吸附能力。吸附機制仍是以物理性吸附為主。環境因子對吸附行為之影響研究中,二氧化碳於CNT(APTS)之吸附量隨著溫度之增加而呈現遞減的關係。然而,CNT(APTS)可在乾燥無水分或含有濕度環境下皆可有效進行二氧化碳吸附。

Carbon nanotubes (CNT), Granular Activated Carbon (GAC) and Zeolite were modified by MEA (monoethanolamine), NH3(aq) and APTS (3-aminopropyltriethoxysilane) solutions and were selected as adsorbents to study their characterizations and adsorption properties of carbon dioxide from air streams.
The physicochemical properties of adsorbents were changed after modification by APTS solutions. These modifications include the increase in surface functional groups and surface basic sites, which enhance the chemisorption capacity of CO2. The 50% CO2 inlet concentration of adsorption capacities of CNT, GAC and Zeolite are 69.2, 73 and 63.4 mg/g for raw adsorbents, respectively. The modified adsorbents are 96.3, 79.5 and 82.4 mg/g. The CNT(APTS) shows the greatest enhancement of CO2 adsorption. The adsorption mechanism appears mainly attributable to physical force. In the temperature range of 5 to 45℃, the adsorption capacity of CNT(APTS) decreased with a rise in temperature. The CNT(APTS) was effective both in the absence and presence of water vapor.
其他識別: U0005-0107200722025400
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