使用改質石灰石進行煅燒/碳化循環作用以捕捉二氧化碳之實驗探討

Experimental Studies of Modified Limestone for CO2 Capture in Multiple Calcination/Carbonation Cycles

莊王吉(Wang-Chi Chuang)

指導教授 ： 王榮基

大同大學/工程學院/化學工程學系所/碩士(2012年)

摘要

為了探討減少二氧化碳污染源之排放，本研究使用來自台灣東部的石灰石以木醋酸(pyroligneous acid, PA)改質，溶膠-凝膠以及氧化鈣摻雜銫的方法，探討在煅燒/碳化循環反應中捕捉二氧化碳的能力。
實驗上使用固定床反應器，利用不同改質方法，測定吸收劑對於二氧化碳捕獲的能力；並於煅燒/碳化循環反應添加水合作用，以提高吸收劑捕獲二氧化碳的活性和耐久性。改質石灰石的煅燒/碳化循環反應於不同操作條件下進行以求得轉化率。二氧化碳捕獲能力的衰減經驗模式，並與實驗結果進行比較。

關鍵字

碳化 ； 煅燒 ； 二氧化碳 ； 氧化鈣 ； 石灰石 ； 水合作用 ； 溶膠凝膠法

並列摘要

The domestic limestone, which comes from eastern Taiwan, is modified with the pyroligneous acid (PA), the sol-gel-like method and cesium-doped calcium oxide to determine the carbon dioxide capture capacity in multiple calcination/carbonation cycles. The fixed-bed operation was employed to examine the carbon dioxide capture ability. Repetitive calcination/carbonation reaction with the hydration treatment was also operated to enhance the reactivity and durability of the sorbents for carbon dioxide capture. Conversions for the repetitive calcination/carbonation reaction of modified limestone were evaluated under different operating conditions. The empirical model for the decay of the carbon dioxide capture capacity from the previous investigation was presented in comparison with the experimental results.

並列關鍵字

carbonation ； calcination ； carbon dioxide ； calcium oxide ； limestone ； hydration ； sol-gel synthesis method

參考文獻

Abanades, J.C., ‘‘The maximum capture efficiency of CO2 using a carbonation/calcination cycle of CaO/CaCO3,’’ Chemical Engineering J., 90, 303–306 (2002).

Abanades, J.C. and D. Alvarez, ‘‘Conversion limits in the reaction of CO2 with lime,’’ Energy & Fuels, 17, 308-315 (2003).

Abanades J.C., E.S. Rubin, E.J. Anthony, “Sorbent cost and performance in CO2 capture systems,” Ind Eng Chem Res, 43, 3462–3466 (2004).

Aihara, M., T. Nagai, J. Matsushita, Y. Negishi, and H. Ohya, “Development of porous solid reactant for thermal-energy storage and temperature upgrade using carbonation/decarbonation reaction,” Applied Energy, 69, 225-238 (2001).

Alvarez, D. and J. C. Abanades, ‘‘Pore-size and shape effects on the recarbonation performance of calcium oxide submitted to repeated calcination/recarbonation cycles,’’ Energy and Fuels, 19, 270-278 (2005).