本研究計畫將開發再生性的聚乙烯亞胺/燻矽固體吸收劑，並用以吸收煙道氣中的二氧化碳。前期計畫(NSC100-2221-E-034-012)的初步研究結果顯示，以含浸法所製備之聚乙烯亞胺/燻矽固體吸收劑在低溫(＜100℃)條件下對二氧化碳有很好的吸收能力，且容易再生利用，具有應用於吸收燃煤火力發電廠等使用化石燃料的設施之煙道氣中二氧化碳的潛力。但煙道氣經過空氣污染防制設備後，仍含有少量的氧氣、二氧化硫和氮氧化物，這些物質可能會影響固體吸收劑吸收二氧化碳的能力和再生利用的壽命。因此，本期計畫將針對所製得高效能的聚乙烯亞胺/燻矽固體吸收劑，探討在低溫、潤濕的煙道氣狀況下氧氣、二氧化硫和氮氧化物對吸收劑吸收二氧化碳的影響，以找出使用此種固體吸收劑吸收煙道氣中二氧化碳時，可行的操作條件(溫度、溼度、二氧化硫與氮氧化物的濃度及反應時間)之範圍。本研究的結果將有助於聚乙烯亞胺/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式設計之基礎資料。
This project is to develop a regenerative polyehtyleneimine/silica fume solid sorbent for the absorption of CO2 in flue gas. In the previous project (NSC100-2221-E-034-012), the preliminary results indicate that the prepared polyethyleneimine/silica fume solid sorbents by the impregnation method having an excellent CO2 capture capacity under low temperature (＜100℃) conditions and being able to be regenerated easily, have a good potential of being used as a sorbent to capture CO2 generated by the fossil fuel burning facilities. However, the flue gas after the air pollution control units still contains low amounts of O2, SO2 and NOx, which might be absorbed or reactive to the solid sorbent. Therefore, the CO2 capture capacity and the lifespan of polyethyleneimine/silica fume solid sorbent may be affected by the presence of SO2 and NOx in the flue gas. Thus, in this project, the effects of O2, SO2 and NOx on the CO2 absorption of the prepared high-performance sorbents under humid and low temperature conditions will be studied, with the aim to find the feasible ranges of the operating conditions (reaction temperature, relative humidity, SO2 concentration, NOx concentration, and reaction time) for using these sorbents to absorb CO2 in the flue gas. The results of this research may contribute to the development of polyethyleneimine/silica fume solid sorbents, and could be the basic data for further design of the CO2 absorption process.
