Yolk-shell-type CaO-based sorbents for CO₂ capture: assessing the role of nanostructuring for the stabilization of the cyclic CO₂ uptake.

ABSTRACT: Improving the cyclic CO₂ uptake stability of CaO-based solid sorbents can provide a means to lower CO₂ capture costs. Here, we develop nanostructured yolk(CaO)-shell(ZrO₂) sorbents with a high cyclic CO₂ uptake stability which outperform benchmark CaO nanoparticles after 20 cycles (0.17 g_CO2 g_Sorbent^-1) by more than 250% (0.61 g_CO2 g_Sorbent^-1), even under harsh calcination conditions (i.e. 80 vol% CO₂ at 900 °C). By comparing the yolk-shell sorbents to core-shell sorbents, i.e. structures with an intimate contact between the stabilizing phase and CaO, we are able to identify the main mechanisms behind the stabilization of the CO_2<

SUBMITTER: Krodel M 

PROVIDER: S-EPMC9685369 | biostudies-literature | 2022 Nov

REPOSITORIES: biostudies-literature