In this paper, a solid sorbent was developed using poly(allylamine) (PAA) as an impregnating agent and SBA-15 as the support. The regenerability and thermal stability of the developed PAA impregnated Molecular Basket sorbents (MBS) were evaluated in comparison with the polyethylenimine (PEI) impregnated MBS. The dependence of CO2 sorption/desorption performance of PAA impregnated MBS on sorption temperature was also examined. PAA(50)/SBA-15 demonstrates higher optimal sorption temperature of 140�C for CO2 capture over the PEI impregnated sorbent. More importantly, the PAA(50)/SBA-15 sorbent exhibits better thermal stability after 260 hrs of heat treatment at 120�C in vacuum oven in terms of less loss in sorbent mass and CO2 sorption capacity than those of PEI impregnated sorbent. The effect of temperature on desorption process suggests that the desorption process is consisted of two stages, fast and slow desorption stage. At the fast desorption stage, the sorbed CO2 can be easily desorbed by lowering the CO2 partial pressure. At the slower desorption stage, higher desorption temperatures is required to overcome the desorption activation energy and diffusion barrier.

New poly(allylamine) functionalized solid molecular basket sorbents for CO<sub>2</sub> capture

246th National Meeting (2013)

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.

New poly(allylamine) functionalized solid molecular basket sorbents for CO2 capture

New poly(allylamine) functionalized solid molecular basket sorbents for CO₂ capture