A Synthetic Methodology for Preparing Impregnated and Grafted Amine-Based Silica-Composites for Carbon Capture
Charlotte Wentz, Zois Tsinas, Amanda L. Forster
Recently, there has been significant effort towards reducing or mitigating CO2 emissions through use of carbon capture materials for point source or direct air capture (DAC) methods. This work focuses on amine functionalized CO2 adsorbents, which show promise for carbon dioxide removal because they have low regeneration energy consumption and higher adsorption capacity. The incorporation of amine species into a porous substrate combines the advantages of the amine species affinity to CO2 with the large pore volumes and surface areas of the porous substrate. There are three methods commonly used to prepare amine-based CO2 sorbents, depending on the selection of the amine species, material support, and preparation method. These methods are impregnation, grafting, or chemical synthesis. Silica is a prevalent choice of substrate material because of its adjustable pore size, ability to function in the presence of water, stability in hot and cold conditions, and ability to adsorb CO2 in low concentration for DAC applications. Typical synthetic procedures and primary attributes of both impregnated and grafted amine-silica composites are described herein.
, Tsinas, Z.
and Forster, A.
A Synthetic Methodology for Preparing Impregnated and Grafted Amine-Based Silica-Composites for Carbon Capture, Journal of Visualized Experiments, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=936924
(Accessed March 5, 2024)