Diffusion in complementary pore spaces

Diffusion in complementary pore spaces
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扩散到互补的孔隙空间

DOI:
10.1007/s10450-016-9792-y
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发表时间:
2016
期刊:
影响因子:
3.3
通讯作者:
J. Kärger
J. Kärger
中科院分区:
工程技术4区
文献类型:
--
作者:
D. Mehlhorn;D. Kondrashova;C. Küster;D. Enke;T. Emmerich;A. Bunde;R. Valiullin;J. Kärger

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传质速率是决定纳米多孔材料通过多相催化或质量分离进行物质升级的效率的关键参数之一。相应地,通过优化孔隙空间来增强运移是提高效率的主要策略之一。任何这类活动都涉及探索和测试材料合成和合成后修改的适当路线,就像探索产生的材料的运输特性一样。建模和分子模拟被认为是将这两种类型的活动及其结果联系起来的最有用的工具。本文件报告了一项由这三类活动组成的协调一致的研究活动。在制作孔隙空间复制品方面的最新进展使这些研究能够将重点放在“互补”的孔隙空间上,即成对的材料上,其中一个样品的孔隙空间与另一个样品的固体空间恰好重合。我们报道了在这种类型的材料中,通过脉冲场梯度核磁共振扩散研究,质量传递中的关联是可观察到的,参考了由对互补孔隙空间中的质量传递进行相当一般的理论处理而得到的预测。
The rate of mass transfer is among the key numbers determining the efficiency of nanoporous materials in their use for matter upgrading by heterogeneous catalysis or mass separation. Transport enhancement by pore space optimization is, correspondingly, among the main strategies of efficiency promotion. Any such activity involves probing and testing of the appropriate routes of material synthesis and post-synthesis modification just as the exploration of the transport characteristics of the generated material. Modelling and molecular simulation is known to serve as a most helpful tool for correlating these two types of activities and their results. The present paper reports about a concerted research activity comprising these three types of activities. Recent progress in producing pore space replicas enabled focusing, in these studies, on “complementary” pore spaces, i.e. on pairs of material, where the pore space of one sample did just coincide with the solid space of the other. We report about the correlations in mass transfer as observable, in this type of material, by pulsed field gradient NMR diffusion studies, with reference to the prediction as resulting from a quite general, theoretical treatment of mass transfer in complementary pore spaces.
质量分形催化剂的有效性
DOI: --
发表时间: 1997
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