Dehydrated Prussian blues for CO2 storage and separation applications

Abstract

Adsorption isotherms of pure gases present in flue and natural gas including CO2, N2, CH4 and water were studied using Prussian blues of chemical formula M3[Co(CN)6]2 (M = Cu, Ni, Mn). These materials adsorbed 8–12 wt% of CO2 at room temperature and 1 bar of pressure with heats of adsorption ranging from 6 to 16 kcal mol−1.