Aminosilicone Solvents for CO₂ Capture

Abstract

This work describes the first report of the use of an aminosilicone solvent mix for the capture of CO(2). To maintain a liquid state, a hydroxyether co-solvent was employed which allowed enhanced physisorption of CO(2) in the solvent mixture. Regeneration of the capture solvent system was demonstrated over 6 cycles and absorption isotherms indicate a 25-50 % increase in dynamic CO(2) capacity over 30 % MEA. In addition, proof of concept for continuous CO(2) absorption was verified. Additionally, modeling to predict heats of reaction of aminosilicone solvents with CO(2) was in good agreement with experimental results.

Aqueous hydrazine as a promising candidate for capturing carbon dioxide

“…Numerous sorbents have been developed for postcombustion CO 2 capture, which include alkanolamines (Rochelle, 2009;Rodriguez et al, 2011;Bishnoi and Rochelle, 2002;Rainbolt et al, 2011;Faramarzi et al, 2009), diamines (Zhou et al, 2010;Speyer et al, 2010), chilled ammonia (Peltier, 2008;Darde et al, 2010), CO 2 -binding organic liquids Zhang et al, 2013;Mathias et al, 2013), non-amine based solvents (Li et al, 2005;Chang et al, 2013), ionic liquids (Bates et al, 2002;Bara et al, 2009;Shannon et al, 2013), and phase-changing sorbents (Perry et al, 2010(Perry et al, , 2012. Monoethanolamine (MEA) has been the most extensively studied solvent for CO 2 capture applications (Rochelle, 2009;Liu et al, 1999;Freguia and Rochelle, 2003;Fan et al, 2009;Conway et al, 2011;Han et al, 2011;Zhu et al, 2012;Supap et al, 2001).…”

Carboxylate‐Assisted Formation of Alkylcarbonate Species from CO2 and Tetramethylammonium Salts with a β‐Amino Acid Anion

“…[1][2][3][4] Most studies to mitigate CO 2 build-up in the atmosphere have been focused on the development of sorbent materials that effectively capture CO 2 after the combustion of fossil fuels. [5,6] The most common technology for CO 2 capture from flue gases is through chemical absorption by using aqueous solutions of alkanolamines. Monoethanolamine (MEA) is an alkanolamine that has been used extensively because of its rapid CO 2 absorption ability, low cost, and high gravimetric absorption capacity.…”

Solvents for Carbon Dioxide Capture

“…Perry et al developed GAP-0 and GAP-1 aminosilicones formulated as a CO 2 -philic siloxane backbone and a CO 2 reactive amino group (Figure 4) [42,43]. The absorption capacity of these compounds is higher than the theoretical of the selected amino group due to the physisorption phenomenon that occurs in this type of blends.…”