School of Chemical and Biomedical Engineering, Nanyang Technological University, Singapore, Singapore.
Department of Nanochemistry, College of Bionano, Gachon University, Sungnam, 13120, Korea.
ChemSusChem. 2016 Mar 8;9(5):455-61. doi: 10.1002/cssc.201600004. Epub 2016 Feb 2.
To prepare materials with high CO2 adsorption, a series of hierarchical LTA zeolites possessing various mesopore spaces that are decorated with alkylamines was designed and synthesized. The highest CO2 uptake capacity was achieved when (3-aminopropyl)trimethoxysilane (APTMS) was grafted onto the hierarchical LTA zeolite having the largest mesopores. Owing to the contributions of both alkylamine groups grafted onto the mesopore surfaces and active sites in the LTA zeolites, the amount of CO2 that can be taken up on these materials is much higher than for conventional aminosilicas such SBA-15 and MCM-41. Furthermore, the adsorbent shows good CO2 uptake capacity and recyclability in dynamic flow conditions.
为了制备具有高二氧化碳吸附性能的材料，设计并合成了一系列具有不同中孔空间的、用烷基胺修饰的分级 LTA 沸石。当（3-氨丙基）三甲氧基硅烷（APTMS）接枝到具有最大中孔的分级 LTA 沸石上时，可获得最高的二氧化碳吸附容量。由于接枝到中孔表面的烷基胺基团和 LTA 沸石中的活性位的共同作用，这些材料可吸收的二氧化碳量远高于传统的氨基硅材料如 SBA-15 和 MCM-41。此外，该吸附剂在动态流动条件下表现出良好的二氧化碳吸附容量和可回收性。
