Absorption of carbon dioxide into aqueous potassium carbonate promoted by boric acid

A review: Desorption of CO 2 from rich solutions in chemical absorption processes

“…Potassium carbonate was used as absorbent material before alkanolamine solutions started getting attention. However, the challenge of using potassium carbonate is that slow reaction kinetics and low mass transfer rates need to be improved (Astarita et al, 1981;Ghosh et al, 2009). The interest in using potassium carbonate as absorbent was renewed because of the enhancement of reaction kinetics by employing additives (Behr et al, 2011(Behr et al, , 2013.…”

CO2 capture with potassium carbonate solutions: A state-of-the-art review

“…Cullinane and Rochelle (2005a) measured the CO 2 absorption rate in a WWC using the mixture of potassium carbonate and piperazine. Ghosh et al (2009) used a WWC to measure the rate of absorption of CO 2 in 30 wt% potassium carbonate and 1 to 5 wt% of acid boric. Addition of boric acid increased the CO 2 absorption rates, but it is still not comparable to the absorption rates in the amine solutions.…”

Natural gas combined cycle power plants with CO2 capture – Opportunities to reduce cost

“…Some recent advances in new amines and blends of amines are given in Ma'mun et al (2007), Mimura et al (1997), and Mangalapally et al (2009). Significant research is also being done using ammonia (Darde et al, 2010) and potassium carbonate (Cullinane and Rochelle, 2004;Gosh et al, 2009;Oexmann and Kather, 2010) as absorbents as well as in the use of ionic liquids (Hasiib-ur-Rahman et al, 2010;Wappel et al, 2010). However, in the quest to find new solvents, it is essential that the solvents have both a high rate of absorption which is necessary in the absorber as well as improved stripping characteristics.…”