Title: Amine Loaded Pillared MCM-36 as a Platform for CO₂ Capture
Authors: Daniel Accetta, Yang Lin, Liah Dukaye, David Hurt, Christopher Marsh, Michael Lanzilloti, Christopher Cogswell, Sunho Choi
Abstract: Current CO₂ capture methods are insufficient and environmentally hazardous. Moreover, current Liquid Amine Adsorption methods have the following issues, they are corrosive to process equipment, hazardous to workers and environment, and require costly regeneration steps with extra process equipment. Therefore, the goal of our work is to use porous solid adsorbents loaded with amine groups to improve the capacity of solid platforms. The creation of porous silicas in the MCM class of frameworks have been shown to be capable of capturing Carbon Dioxide once loaded with amines[2–5]. However the large pore version of these supports called MCM-36, which is composed of layers of porous silica staked one on top of the other in the c-axis with silica oxide supports holding the layers apart, has shown capture at relatively low capacities. We recently published a report on a silica pillared MCM-36 solid loaded with polyethylenimine, in which a significant decrease in capacity and carbon dioxide diffusion time was observed upon amine loading. This was attributed to the loss of the porosity of the solid upon addition of bulky amine groups, leading to significant increases in diffusion time and decreases in final capacity. In order to attempt to side step this polymer loading issue, the creation of MCM-36 samples loaded with tetraethylenepentamine as well as PEI + tetraethylenepentamine has been investigated, and shows significant increases in capacity over the bare material.
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