利用海水沉澱法所製備之碳酸鈣與碳酸鎂捕獲二氧化碳

Sea water precipitated calcium and magnesium oxides sorbents for CO2 capture

杜若思

指導教授 ： 白曛綾

國立交通大學/工學院/環境工程系所/碩士(2010年)

https://doi.org/10.6842/NCTU.2010.01119

摘要

無

關鍵字

無

並列摘要

Calcium based sorbent for cyclic calcination/carbonation is considered as one of the promising CO2 capture technologies. But the prevention of CaO sintering and deterioration is a challenge for the development of CaO technology. In the present study the mechanical mixing method between sea water precipitated CaO and MgO to enhance the sorption capacity during cyclic capture is demonstrated. The cyclic CO2 capture capacities of the sorbents were evaluated by thermo gravimetric analysis (TGA). The results indicated that by adding only 5 wt. % of MgO into the CaO sorbent (CaO-MgO), the CO2 absorbed amount can be improved by 17% compared to the original CaO sorbent. Instead of passing CO2 only during the sorption period, passing CO2 right after the calcination process is completed (i.e. during the cooling and sorption periods) can greatly improve the capacity and stability of the cyclic absorption. The heating and cooling rates also affect the sorbent performance significantly.

並列關鍵字

CO2 capture and storage (CCS) ； greenhouse gas ； greenhouse effect ； limestone ； calcium oxide ； chemical looping

參考文獻

Abanades, J.C. and Alvarez, D. (2003). Conversion Limits in the Reaction of CO2 with Lime. Energy and Fuels, 17(2), 308-315.

Albrecht, K.O., K.S. Wagenbach, J.A. Satrio, B.H. Shanks, and T. D. Wheelock. (2008). Development of a CaO-Based CO2 Sorbent with Improved Cyclic Stability. Industrial and Engineering Chemistry Research, 47(20), 7841-7848.

Alvarez, D. and Abanades, J.C., (2005). Determination of the Critical Product Layer Thickness in the Reaction of CaO with CO2. Industrial and Engineering Chemistry Research, 44(15), 5608-5615.

Arakawa, H., (1998). Research and development on new synthetic routes for basic chemicals by catalytic hydrogenation of CO2. In M. A. T. Inui and T. Yamaguchi, eds. Advances in Chemical Conversions for Mitigating Carbon Dioxide. Elsevier, pp. 19 - 30.

Barker, R., (1973). The reversibility of the reaction CaCO3--> CaO+CO2. Journal of Applied Chemistry and Biotechnology, 23(10), 733-742.