The kinetics of binding carbon dioxide in magnesium carbonate

Abstract

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Geological Sequestration of CO2 by Hydrous Carbonate Formation with Reclaimed Slag

“…As the disposal source of this study is a solid carbonate, the source of alkaline ions cannot be a carbonate (which require aqueous discharge), but will most likely be a silicate mineral rich in magnesium or calcium, thus the bicarbonate forming minerals listed in Lackner are precluded from Direct carbonation of Mg(OH) 2 was studied in further detail specifically to determine kinetic rates and factors. 36 The rate of carbonation was found to be most rapid very near the dissociation temperature, as shown in Without pretreatment activation 30-50% carbonation was achieved within one hour.…”

“…Equations 1-4 show the formation of the respective hydroxide from each compound, while 36 and has a quoted dehydration temperature of 285°C (545°F). 34 The reactions of these oxides with water lead to a substantial volume change (97% and 22 119% respectively), which is why they are listed as key compounds in slag swelling studies.…”

An experimental investigation of mesoporous MgO as a potential pre-combustion CO2 sorbent

“…Results and discussion Figure 1 One of the vital factors in gas-solid carbonation reaction is the presence of water and there have been numerous observations where water acts as a catalyst [31][32][33][34]. Therefore, we have also used water (0.1 ml) for the MgO-CO 2 reaction.…”

Parameters affecting Mg(OH)2 extraction from serpentinites in lithuania for the purpose of CO2 reduction by mineral carbonation

“…The conversion efficiency of 65%-wt of Mg(OH) 2 was achieved after 15 min of reaction at 50, 74 bar, and at 535 C conditions. Here, carbonation of Mg(OH) 2 extracted from sample 980/630 was performed at conditions similar to those used by Butt et al [25] for maximum conversion Mg(OH) 2 was achieved after 15 min carbonation at 51 bar (dry) CO 2 and at 535 C laboratory conditions. In comparison, earlier work by Stasiulaitiene et al [11] reported that Mg(OH) 2 conversion to MgCO 3 from Lithuanian serpentinite was 50%-wt after 9 min at 20 bar and at 490 C. Similarly, a 50%-wt conversion was achieved for Finnish serpentinite derived Mg(OH) 2 (500 C, 20 bar, > 300 lm) [9].…”