Wentz Charlotte M, Tsinas Zois, Forster Amanda L
Material Measurement Laboratory, National Institute of Standards and Technology (NIST); University of Maryland.
Material Measurement Laboratory, National Institute of Standards and Technology (NIST); Theiss Research.
J Vis Exp. 2023 Sep 29(199). doi: 10.3791/65845.
Recently, there has been a significant effort towards reducing or mitigating CO2 emissions through the use of carbon capture materials for point source or direct air capture (DAC) methods. This work focuses on amine-functionalized CO2 adsorbents for DAC. These materials show promise for CO2 removal because they have low regeneration energy consumption and high 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, moisture tolerance, temperature stability, and ability to adsorb CO2 in low concentrations for DAC applications. Typical synthetic procedures and primary attributes of both impregnated and grafted amine-silica composites are described herein.
最近，人们为通过使用用于点源或直接空气捕获（DAC）方法的碳捕获材料来减少或减轻二氧化碳排放做出了重大努力。这项工作聚焦于用于直接空气捕获的胺功能化二氧化碳吸附剂。这些材料在二氧化碳去除方面展现出前景，因为它们具有低再生能耗和高吸附容量。将胺类物质掺入多孔基质中，结合了胺类物质对二氧化碳的亲和力以及多孔基质的大孔体积和表面积的优点。根据胺类物质、材料载体和制备方法的选择，通常有三种方法用于制备胺基二氧化碳吸附剂。这些方法是浸渍法、接枝法或化学合成法。二氧化硅是一种普遍选用的基质材料，因为其孔径可调、耐湿性好、温度稳定性高，并且能够在低浓度下吸附二氧化碳用于直接空气捕获应用。本文描述了浸渍型和接枝型胺 - 二氧化硅复合材料的典型合成程序和主要特性。
