Generation and use of a pure titanium pillared MCM-36 structure as a high efficiency carbon dioxide capture platform and amine loaded solid adsorbent

Abstract

Abstract In this work titanium oxide pillared MCM-36 adsorbents have been studied as amine loaded class-1 adsorbents for carbon dioxide capture. This work has shown that pillaring of the MCM support with titanium oxides can yield a material with carbon dioxide capacities higher than silica pillared MCM sorbents (1.62 mmol/g for Ti, 1.02 mmol/g for Si), with similar surface area (∼450 m2/g for Ti versus ∼500 m2/g for Si) observed for the titanium pillared derivative. The titanium oxide pillared adsorbent was also loaded with polyethylenimine and tetraethylenepentamine amine containing molecules. It was observed that the higher initial capacity of the titanium oxide pillared MCM-36 allows for it to retain good CO2 capacities of up to ∼1.79 mmol/g at high amine loadings (∼50 wt% of tetraethylenepentamine). However, it was found that increasing the content of polyethylenimine loaded on the adsorbent led to decreased carbon dioxide capacities.