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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 >  13X沸石於固定床與流體化床中捕獲後燃燒煙道氣二氧化碳之比較

Please use this identifier to cite or link to this item: http://nchuir.lib.nchu.edu.tw/handle/309270000/155132

標題: 13X沸石於固定床與流體化床中捕獲後燃燒煙道氣二氧化碳之比較
Comparison of post-combustion CO2 capture with 13X zeolite in fixed bed and fluidized bed
作者: 廖健翔
Liao, Chien-Hsiang
Contributors: 盧重興
環境工程學系所
關鍵字: 二氧化碳捕獲;流體化床;13X沸石;循環吸脫附
CO2 capture;Fluidized bed;CO2 adsorption/desorption;13X zeolite
日期: 2013
Issue Date: 2013-11-21 11:40:49 (UTC+8)
Publisher: 環境工程學系所
摘要: 本研究使用流體化床反應器,以13X沸石進行二氧化碳捕獲,以評估於實廠應用之可能性。其研究結果可分為以下兩個階段:
第一階段為尋找最佳尺寸之13X運用於流體化床中進行其CO2之捕獲。其研究結果顯示,當吸附環境30 °C、含水率0 vol%、流速0.38 m/s以及進流15% CO2條件下,球狀13X (0.3-0.6 mm)具有最高之工作吸附量(qw)為74.5 mg/g。
第二階段為固定床與流體化床100次循環吸脫附試驗之比較,經實驗結果得之,固定床之工作吸附量(qw)平均值為69.9±3.7 mg/g、吸附指標(AI)平均值為73.8±3.9 %、CO2去除率為99.8±0.1 %、最高CO2脫附濃度為99.5 %;流體化床之qw平均值為49.8±2.5 mg/g、AI平均值為67.3±5.4 %、CO2去除率為99.4±1.1 %、最高CO2脫附濃度為99.5 %、平均固體迴流率則為2.52±0.13 kg/m2-s。而於實驗結果得知,固定床之吸附量較流體化床高出1.4倍左右,但其操作時間為流體化床之1.67倍,因此單位操作時間之CO2累積捕獲量,其流體化床比固定床高出1.2倍左右。
上述結果顯示流體化床比起固定床具有更高之CO2吸附效率,於未來實廠面臨大量CO2排放量而言,具有較高之運用潛力。
13X zeolite were employed as adsorbents for CO2 capture form gas steams by the fluidized bed. Research results were divided into the following two parts.
The first part was found the optimum size of 13X zeolite to capture carbon dioxide. The results indicate that the best of adsorption capacity was obtained under 30 �C with 15 vol% CO2 inlet using sphere 13X zeolite (0.3-0.6 mm). The working capacity (qw) of sphere 13X zeolite (0.3-0.6 mm) reached 74.5 mg/g under 0.38 m/s of superficial velocity.
The second part was the comparison of CO2 adsorption/desorption with 13X zeolite between fixed bed and fluidized bed. The results showed that after 100 cycles, the average working capacity was 49.8�2.5 mg/g , which was 28.8 % lower than fixed bed. However, the CO2 accumulation amount per operation time in fluidized bed was 20 % higher than that in fixed bed.
Above results reflect that the fluidized bed possesses higher CO2 capture rate than the fixed bed and appears more practical in the flue gas application.
Appears in Collections:[依資料類型分類] 碩博士論文

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