Corrigendum to: “The decrease of carbonation efficiency of CaO along calcination–carbonation cycles: Experiments and modelling” [Chem. Eng. Sci. 64 (2009) 2136–2146]

Recent advances in capture of carbon dioxide using alkali-metal-based oxides

“…40 The deactivation primarily results from the formation of layerstructured CaCO 3 surrounding the CaO which, once a certain thickness (e.g., $20 nm) is reached, severely hampers the diffusion of CO 2 to react with the inner core. [41][42][43][44]47,48 There are two types of carbonates produced depending on the type of space filled up during carbonation (Fig. 2).…”

“…44 It has also been reported that the adsorption capacity for CaO-based sorbents decays as a function of the sintering of CaO grain at high temperature and a certain loss in the porosity. 48,49 When pores smaller than a critical value (e.g. $200 nm) are filled, the reaction gets much slower.…”

“…41,42,44,49,50 The layer-structured CaCO 3 is formed during the reaction which prevents the diffusion of CO 2 into the particle interior to react with CaO, the whole process could then be diffusion-controlled. [41][42][43]47,48,50 Thus, the sorbent would act better if the particle size is small (e.g., 30-50 nm) that allows carbonation to take place at the rapid reaction-controlled regime in contrast to the diffusion-controlled regime with larger sorbent particles. Barker found that nanosized CaO particles ($10 nm) attained a conversion level of 93% after 30 cycles for 24 h carbonation at 629 C. 51 CaO obtained from the decomposition of nanosized CaCO 3 ($40 nm) was also studied and its CO 2 capture capability can reach 21 wt% after 100 cycles for 20 min carbonations at 650 C. 52,53 Nanostructured CaO-based sorbents (30-50nm grain size and 40-60 m 2 g À1 surface area) produced by flame spray pyrolysis (FSP) were demonstrated to be stable and reversible with a high CO 2 uptake capacity sustaining the maximum molar conversion of $50% even after 60 cycles.…”

Thermokinetic Investigations of High Temperature Carbon Capture Using a Coal Fly Ash Doped Sorbent

“…5,24,25 The estimation of kinetic parameters was reported employing random pore model (RPM) at different temperatures using the experimental data on CaO sorbent conversion. 26,27 The micro grain−grain model was employed with three reaction stages that include short kinetically controlled regime (0−17% conversion), mixed carbonation regime (both reaction and diffusion) from 17 to 50% conversion and diffusion only regime through carbonate layer 28 up to 100% conversion. Structural properties of the sorbent estimated using various models were used to describe reaction controlled and diffusion controlled regimes.…”

Kinetics of Calcination of Partially Carbonated Particles in a Ca-Looping System for CO2 Capture

“…Most recent studies on sorbent performance have focused on the determination of CO 2 carrying capacity of the sorbent (see reviews 1,2,3 ) in a wide range of conditions and for a large variety of materials. This improved knowledge on sorbent performance has facilitated the development of kinetic reaction models suitable for the conditions of interest for the process (Bouquet et al 7 , Sun et al 8 , Fang et al 9 , Grasa et al 10 ). High reaction rates between the CO 2 in the flue gas and the sorbent particles are certainly necessary in order to design compact CO 2 absorbers.…”