2021
DOI: 10.26434/chemrxiv.14130317.v1
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Assessment of the Effect of Process Conditions and Material Characteristics of Alkali Metal Salt-Promoted MgO-Based Sorbents on Their CO2 Capture Performance

Abstract: CO<sub>2</sub> capture using alkali metal salt (AMS)-promoted MgO-based sorbents at intermediate temperatures (300 – 500 °C) has gained increased interest recently. The prospects of such materials for CO<sub>2</sub> capture were assessed in this work. We investigated the most reactive MgO-based sorbents that have been reported in the literature, i.e., MgO promoted with a combination of various AMS (incl. NaNO<sub>3</sub>, LiNO<sub>3</sub>, K<sub>2</sub&g… Show more

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“…450 °C (e.g., NaNO 3 → NaNO 2 + 0.5 O 2 ) 468,472 forming double carbonates (e.g., Na 2 Mg(CO 3 ) 2 ), which in some cases have shown to improve the CO 2 uptake over repeated cycling. 448,473 An alternate approach to stabilize the cyclic uptake of AMS-promoted MgO has been shown through the addition of hydrotalcites or TiO 2 . Here, the composite structure (e.g., MgO−TiO 2 ) enhanced the growth of more but small crystallites of MgCO 3 , thereby reducing sintering.…”
Section: Mgo-based Sorbentsmentioning
confidence: 99%
“…450 °C (e.g., NaNO 3 → NaNO 2 + 0.5 O 2 ) 468,472 forming double carbonates (e.g., Na 2 Mg(CO 3 ) 2 ), which in some cases have shown to improve the CO 2 uptake over repeated cycling. 448,473 An alternate approach to stabilize the cyclic uptake of AMS-promoted MgO has been shown through the addition of hydrotalcites or TiO 2 . Here, the composite structure (e.g., MgO−TiO 2 ) enhanced the growth of more but small crystallites of MgCO 3 , thereby reducing sintering.…”
Section: Mgo-based Sorbentsmentioning
confidence: 99%