ABSTRACT
Abstract ................................................................................................. 214 7.1 Introduction .................................................................................. 214 7.2 Techniques and Materials for Separating and Capturing
CO2, Regeneration and Reuse ...................................................... 217 7.3 Silicone Materials for CO2 Capturing .......................................... 219 7.4 Amino-Silicones-High Efficient Absorber for CO2:
Advantages and Disadvantages ................................................... 231 7.5 Applications as Gas Sensors ........................................................ 232 7.6 Concluding Remarks and Outlooks ............................................. 234 Acknowledgments ................................................................................. 235 Keywords .............................................................................................. 235 References ............................................................................................. 235
2 FROM THE
ALEXANDRA BARGAN* and MARIA CAZACU
Inorganic Polymers Department, “Petru Poni” Institute of Macromolecular Chemistry, Gr. Ghica Voda Alley 41A, 700487 Iasi, Romania
*Corresponding author. E-mail: anistor@icmpp.ro
ABSTRACT
Because anthropogenic carbon dioxide (CO2) emissions in the atmosphere have greenhouse effect contributing to global warming, worldwide efforts are being made to reduce them, developing techniques for separating and capturing CO2 being a priority. One of the most effective technologies for CO2 capture consists of chemical absorption in a liquid medium containing the amine (alkanolamine and ammonia) with the formation of carbamate or bicarbonate. Because the reaction is reversible, CO2 can then be removed by heating with the amine regeneration and reuse it. Silicone materials have also been studied as means of capturing CO2, among them amino-silicones recently proved to be highly efficient absorber of this. For such use, amines containing siloxanes has several advantages over the classic organic amines such as high thermal stability, low volatility, and low viscosity, which allows their use as such, without the need for dissolution/dilution with water or organic solvents. This makes the heat energy needed to release CO2 and absorber regeneration to be reduced. The effectiveness of the amino-silicones in retaining CO2 is extended in their use as sensors for this gas. This chapter critically reviewed and analyzed the results of the authors and those reported in the literature on both these directions.
