Efficient CO2 capturer derived from as-synthesized MCM-41 modified with amine.
Efficient CO2 capturer derived from as-synthesized MCM-41 modified with amine.
复制标题
DOI：
10.1002/chem.200701467
复制
发表时间：
2008-04
期刊：
影响因子：
--
通讯作者：
M. Yue;Linbing Sun;Yi Cao;Ying Wang;Zhu Wang;J. Zhu
中科院分区：
文献类型：
--
作者：
M. Yue;Linbing Sun;Yi Cao;Ying Wang;Zhu Wang;J. Zhu
报道了一种合成高效CO（2）捕集剂的新方法，即在MCM-41（AM）中引入四乙烯五胺（TEPA）。胺客体分子可以分布在载体的胶束中，在介孔内形成网状结构以捕获CO（2）分子，并导致对CO（2）的高吸附容量高达237 mg g（-1）。以4种不同表面活性剂的MCM-41为载体，考察了胶束对CO（2）吸附的影响，发现胶束在载体孔道中的辐条状结构对客体胺的分布起着重要作用.在这些载体中，AM样品是最有竞争力的，这是由于在制备载体中节省能量和时间的优点沿着由此产生的较高的CO（2）吸附容量。当TEPA的最佳负载量为50wt%时，AM-50样品在5%CO（2）浓度下的第六次吸附循环中表现出183 mg g（-1）的高吸附容量。
A new strategy to synthesize a highly efficient CO(2) capturer by incorporating tetraethylenepentamine (TEPA) into as-synthesized MCM-41 (AM) is reported. The amine guest can be distributed in the micelle of the support, forming a web within the mesopore to trap CO(2) molecules and resulting in a high adsorption capacity for CO(2) up to 237 mg g(-1). Four samples of the as-synthesized MCM-41 with a different amount or type of surfactant are employed as supports to investigate the influence of micelles on the CO(2) adsorption, and the spokelike structure of the micelle in the channel of the support is proven to be essential to the distribution of guest amine. Among these supports, the AM sample is the most competitive due to the advantages of energy and time saving in preparation of the support along with the resulting higher CO(2) adsorption capacity. At the optimal loading of 50 wt % TEPA, the AM-50 sample exhibits a high adsorption capacity of 183 mg g(-1) in the sixth adsorption cycle at 5 % CO(2) concentration.