Gaseous carbon dioxide conversion and calcium carbonate preparation by magnesium phyllosilicate

Abstract

Magnesium phyllosilicate (Mg–APTES) was developed and explored for its applicability as a potent carbonation catalyst that converts CO₂ into carbonate ions. Careful investigation of its surface properties revealed a lamellar structure and the existence of an amine group, which is the expected CO₂ capture site. The prepared magnesium phyllosilicate was found to successfully convert gaseous CO₂ into HCO₃⁻ (bicarbonate ion), actively forming CaCO₃ (calcium carbonate) when Ca²⁺ (calcium ion) was supplied. This study shows that the magnesium phyllosilicate, a new type of carbonation agent and a concept of an artificial mimetic catalyst, can be a good candidate catalyst for CO₂ capture.