Aqueous hydrazine as a promising candidate for capturing carbon dioxide

作者：Lee Kyu Hyung; Lee Byeongno; Lee Ju Hee; You Jong Kyun; Park Ki Tae; Baek Il Hyun; Hur Nam Hwi^*

来源：International Journal of Greenhouse Gas Control, 2014, 29: 256-262.

DOI：10.1016/j.ijggc.2014.08.018

• Carbon dioxide capture
• Aqueous hydrazine
• Sorbent
• Climate change
• Sustainable chemistry

Hydrazine, which is the simplest diamine, was investigated for its viability as a sorbent for carbon dioxide (CO2) capture from flue gas using lab scale experiments. It has a high CO2 absorption capacity due to its low molecular weight. The overall mass transfer coefficient of aqueous hydrazine (32 wt%) is about 2.9 times higher than that of the benchmark monnethanolamine (MEA, 30 wt%), indicating that the absorption rate of CO2 in aqueous hydrazine is remarkably fast. Furthermore, the cyclic capacity of aqueous hydrazine is comparable to that of MEA. Aqueous hydrazine has demonstrated the ability to capture and release CO2 for three cycles without changing its absorption capacity. In addition, aqueous hydrazine does not show any indication of thermal degradation up to 90 degrees C. These advantages could lead to a substantial reduction of the cost of electricity, making aqueous hydrazine a promising new sorbent for post-combustion CO2 capture applications.

• 出版日期2014-10