本研究計畫將開發再生性的界面活性劑修飾聚乙烯亞胺/燻矽固體吸收劑，並用以捕捉煙 道氣或大氣中的二氧化碳。首先進行燻矽載體的水合漿化，再以含浸法分別將各式的界面活 性劑(Triton X-100, Span 20, Span 80, and Tween 60)以及聚乙烯亞胺(Polyethyleneimine, PEI)依 特定組成比例負載於燻矽固體表面，探討吸收劑製備條件與程序參數對吸收劑表面官能基特 徵與物理結構性質的影響，並先以熱重分析氣固反應系統評估固體吸收劑的熱穩定性以及在 模擬煙道氣之特定反應條件下對CO2 的反應性與捕捉能力，藉以得到吸收劑的最佳製備條件 與成分組成，並找出試樣吸收CO2 之可行再生條件之範圍。再者，針對所製得高效能的燻矽 固體吸收劑，以固定床反應器裝置與連續式CO2 氣體分析儀測定吸收劑之CO2 捕捉率隨反應 溫度、溼度、CO2 濃度以及反應時間變化的情形，以找出使用此種固體吸收劑直接從大氣中 捕捉二氧化碳時，可行的操作條件(溫度、溼度、二氧化碳濃度及反應時間)與再生條件之範圍。 本研究的結果將有助於界面活性劑修飾聚乙烯亞胺/燻矽固體吸收劑之開發，並可作為後續的 二氧化碳吸收設備和程序設計之基礎資料。
This project is to develop a regenerative surfactant modified polyethyleneimine/silica fume solid sorbent for CO2 capture from the flue gas or the air. The 3-Aminopropyltriethoxysilane (APTS), various surfactants (Triton X-100, Span 20, Span 80, and Tween 60), and polyethyleneimine (PEI) will be respectively supported on the hydrated silica fume particles with the certain weight ratios by the impregnation method. The effects of the sorbent preparation parameters on the characteristics of surface functionality and physical structure of the sorbent will be studied. The thermal stabilities and CO2 capture capacities of the prepared sorbents under the flue gas conditions will be evaluated using the TGA gas-solid reaction apparatus. The best component and composition of the solid sorbent and its optimal preparation conditions and regenerated parameters will be determined. Moreover, the dependency of the reaction conditions (temperature, humidity, CO2 concentration and reaction time) on the CO2 capture capacities of the high-performance solid sorbents will be analyzed using the fixed-bed reaction apparatus and a CO2 analyzer with the aim to find out the feasible ranges of the operating conditions and the regenerated parameters for using these sorbents to capture CO2 in the air. The results of this research may contribute to the development of surfactant modified polyethyleneimine/silica fume solid sorbents, and could be the basic data for further design of the CO2 absorption process.
