Sorption of Carbon Dioxide onto Sodium Carbonate

Performance evaluation for carbonation of steel-making slags in a slurry reactor

“…A shrinking-core model can be performed to analyze the experimental data during trials of carbonation conversion of calcium oxide [10]. The reaction mechanism consists of (a) diffusion of a gaseous reactant through the boundary film surrounding the solid particles; (b) penetration and diffusion of the reactant through the layer of solid product until it reaches the surface of the unreacted core; and (c) reaction over the surface of the core.…”

Low-temperature solid carbon dioxide carriers

“…For Na 2 CO 3 obtained from the decomposition of NaHCO 3 (Liang, Harrison, Gupta, Green, & McMichael, 2004), the carbonation process results in the formation of Na 2 CO 3 $3NaHCO 3 (Wegscheider's salt) at a carbonation temperature of 70 C and higher, whereas NaHCO 3 is formed at temperatures below 70 C. This conclusion is widely accepted by many other researchers for both pure sodium carbonate and sodium-based supported sorbents Dutcher, Fan, Leonard, Dyar, et al, 2011;Lee, Ryu, et al, 2008;Park, Sung, Choi, Oh, & Moon, 2006). RTI derived kinetic rate constants for the carbonation reaction of Na 2 CO 3 (Green et al, 2001a), and compared these values with TGA results from LSU.…”

“…A series of TGA tests for the decomposition processes of NaHCO 3 were carried out under pure He, pure CO 2 , or CO 2 /H 2 O atmospheres at temperatures ranging from 120 to 200 C. It was found that the decomposition processes for NaHCO 3 in TGA started at the temperature of 102.3 C and terminated at the temperature of 210.7 C (Park, Sung, Choi, Oh, et al, 2006). NaHCO 3 will be completely decomposed with a fast reaction rate in this temperature range.…”

The Virtuous CO2 Circle or the Three Cs: Capture, Cache, and Convert

“…The typical working conditions are temperature below 100 ∘ C in the presence of water [16], but a sorbent for higher temperature applications was also developed [17]. The support material for dry alkali sorbent is a fundamental issue: the proper catalytic inorganic support (AC, alumina, silica, titania, or magnesia) increases the specific surface area [18] and in some cases is the main factor responsible for the proper functioning of the sorbent [19]. Increasing adsorption capacity beyond the calculated value is reported for the case of K 2 CO 3 supported on MgO [20].…”