been described as facilitators or catalysts for CO2 absorption by both MgO and MgO-
containing double salts. Although MgO exhibits a high capacity (exceeding 70 wt%), its
regenerability in multicycle tests shows a significant loss of capacity with cycle number prior
to lining out. On the other hand, the MgO–Na2CO3 double salt shows a lower (∼ 16 wt%)
but stable capacity over multiple cycles under pressure swing operation. The purpose of this …