English  |  正體中文  |  简体中文  |  Items with full text/Total items : 43312/67235
Visitors : 2107301      Online Users : 18
RC Version 5.0 © Powered By DSPACE, MIT. Enhanced by NTU/NCHU Library IR team.
National Chung Hsing University Institutional Repository - NCHUIR > 工學院 > 環境工程學系所 > 依資料類型分類 > 碩博士論文 >  雙床吸附塔填充改質多壁奈米碳管捕獲二氧化碳之研究

Please use this identifier to cite or link to this item: http://nchuir.lib.nchu.edu.tw/handle/309270000/155331

標題: 雙床吸附塔填充改質多壁奈米碳管捕獲二氧化碳之研究
A study on CO2 capture by a dual-bed adsorber packed with modified mutiwalled carbon nanotubes
作者: 鍾艾儒
Chung, Ai-Ju
Contributors: 盧重興
環境工程學系所
關鍵字: 二氧化碳捕獲;奈米碳管;雙床吸附塔;循環吸附
CO2 capture;carbon nanotubes;dual-bed adsorber packed;regeneration
日期: 2012
Issue Date: 2013-11-21 11:52:46 (UTC+8)
Publisher: 環境工程學系所
摘要: 本研究以雙床吸附塔填充3-胺基丙基三乙氧基矽烷(3-aminopropyl)triethoxysilane, APTS)改質奈米碳管(carbon nanotubes, CNTs),模擬實場煙道氣經除硫系統(flue gas desulfurization, FGD)前後之環境條件,進行二氧化碳(CO2)吸脫附效率測試,並作為未來實場應用之參考依據及評估其可行性。單床試驗求得CNT(APTS)於25 °C、15% CO2及無水條件下之工作吸附量為61.0 mg/g,當脫附溫度為150 °C及脫附壓力為0.1 bar時,有最佳的再生工作吸附量41.2 mg/g,且CO2濃縮率為57.9 %;經10次再生循環吸脫附試驗後,其工作吸附量仍可維持在41.5 mg/g,而CO2濃縮率則為53.1 %。於飽和相對濕度(RH=100%)環境下,當吸附溫度為25 °C時,其工作吸附量可提升至86.9 mg/g,CO2濃縮率也可提升至82%,經再生循環10次吸脫附後,工作吸附量仍可維持在68.8 mg/g,而CO2濃縮率則為69 %。當進流氣體中含有50 ppm與200 ppm 的SO2濃度時,由於CNT(APTS)會吸附些許的SO2,因此會使得吸附CO2的效能下降9至13 mg/g;而當進流氣體中含有NOx濃度時,CNT(APTS)不會吸附NOx,因此並不會影響吸附CO2的效能。CNT(APTS)於雙床吸附塔中進行連續循環吸脫附實驗,在乾式環境下進行再生循環100次,其第100次的工作吸附量為38.1 mg/g,CO2濃縮率為56.5% ;在濕式環境下,當再生循環100次時,工作吸附量可提升至63.3 mg/g,CO2濃縮率為69 %。綜合以上結果,CNT(APTS)之再生吸脫附及有效濃縮CO2,對於未來在實場的CO2捕獲及濃縮上,具開發之潛力。
Carbon nanotubes (CNTs) were modified by 3-aminopropyltriethoxysilane (APTS) and were employed as sorbents of CO2 from gas streams by dual-bed adsorber packed. This study investigates the adsorption behavior as well as their regeneration and desorption properties in different operation conditions to increase the effect of water vapor, SO2 and NOx. The adsorption capacities (qw) of CNT(APTS) was 61.0 mg/g in dry system under 15% CO2 at 25 �C. When the TSA/VSA optimal conditions were at 150 �C and 0.1 bar, the qw decreased to 41.2 mg/g and the ratio of CO2 concentrate was 57.9 %. The qw was 41.5 mg/g and the ratio of CO2 concentrate was 53.1 % after 10 cycles. Under the same conditions with 100 %(v/v) of water content, the qw of CNT(APTS) upgraded to 86.9 mg/g and the ratio of CO2 concentrate also upgraded to 82 %. The qw was 68.8 mg/g and the ratio of CO2 concentrate was 69 % after 10 cycles. When the inflow gas contained SO2, the CNT(APTS) on the adsorption of CO2 performance degraded about 9 to 13 mg/g. When the inflow gas contained NOx, the CNT(APTS) would not affect the adsorption of CO2 performance. Using dual-bed adsorber packed to operate 100 cycles of adsorption/desorption with TSA/VSA process, the qw decreased to 38.09 mg/g and the ratio of CO2 concentrate was 56.5% under 15% CO2 at 25 �C conditions in dry system. At the same conditions with 100 % (v/v) of water content, the qw upgraded to 63.3 mg/g and the ratio of CO2 concentrate was 69%. For these reasons, CNT(APTS) is possibility of prolonged cyclic operation and promising adsorbent for CO2 capture from flue gas.
Appears in Collections:[依資料類型分類] 碩博士論文

Files in This Item:

File SizeFormat
index.html0KbHTML162View/Open


 


學術資源

著作權聲明

本網站為收錄中興大學學術著作及學術產出,已積極向著作權人取得全文授權,並盡力防止侵害著作權人之權益。如仍發現本網站之數位內容有侵害著作權人權益情事者,請權利人通知本網站維護人員,將盡速為您處理。

本網站之數位內容為國立中興大學所收錄之機構典藏,無償提供學術研究與公眾教育等公益性使用。

聯絡網站維護人員:wyhuang@nchu.edu.tw,04-22840290 # 412。

DSpace Software Copyright © 2002-2004  MIT &  Hewlett-Packard  /   Enhanced by   NTU/NCHU Library IR team Copyright ©   - Feedback