微孔吸附剂中脉冲场梯度核磁共振自扩散测量

PFG NMR self-diffusion measurements in microporous adsorbents.

作者信息

Kärger J, Pfeifer H

机构信息

Universität Leipzig, Fachbereich Physik, Germany.

出版信息

Magn Reson Imaging. 1994;12(2):235-9. doi: 10.1016/0730-725x(94)91525-3.

DOI:10.1016/0730-725x(94)91525-3

PMID:8170308

Abstract

A survey is given on the possibilities of pulsed field gradient (PFG) NMR to study molecular diffusion in beds of microporous adsorbent particles (zeolite crystallites). Depending on the given adsorbate-adsorbent system, the PFG NMR data on intracrystalline diffusion are both in agreement and disagreement with the results of uptake measurements. Two novel routes to unveil the origin of such discrepancies are described.

摘要

本文综述了脉冲场梯度（PFG）核磁共振技术用于研究微孔吸附剂颗粒（沸石微晶）床层中分子扩散的可能性。根据给定的吸附质 - 吸附剂体系，关于晶内扩散的PFG NMR数据与吸附测量结果既有一致之处，也存在分歧。文中描述了揭示这种差异来源的两种新途径。