Alkane/alkene mixture diffusion in silicalite-1 studied by MAS PFG NMR
Alkane/alkene mixture diffusion in silicalite-1 studied by MAS PFG NMR
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DOI：
10.1016/j.micromeso.2017.08.015
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发表时间：
2018-02-01
影响因子：
5.2
通讯作者：
Haase, Juergen
中科院分区：
文献类型：
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作者：
Dvoyashkina, Nina;Freude, Dieter;Haase, Juergen
利用魔角旋转脉冲场梯度核磁共振(MAS PFG NMR)研究了273 K、313 K和373 K温度下正构烷烃和正构烯烃(C2~C6)及其混合物在silicalite-1中的扩散率。结果表明，在碳原子数相同、总负载量相同的情况下，烷烃、烯烃及其混合物的扩散率没有显着差异。发现烷烃、烯烃及其混合物的扩散率随着碳数的增加而单调减小，这与在silicalite-1中正构烷烃的MD模拟中获得的结果一致。 (C) 2017 Elsevier Inc. 保留所有权利。
The diffusivity of n-alkanes and n-alkenes (C2 to C6) and their mixtures in silicalite-1 was studied by magic-angle spinning pulsed field-gradient nuclear magnetic resonance (MAS PFG NMR) at the temperatures of 273 K, 313 K and 373 K. It could be proved that there is no significant difference between the diffusivities of alkanes, alkenes and their mixtures for equal carbon numbers and equal total loading. The diffusivities of the alkanes, alkenes and their mixtures are found to monotonically decrease with increasing carbon number, in agreement with the results obtained in MD simulations with n-alkanes in silicalite-1. (C) 2017 Elsevier Inc. All rights reserved.