Quantitative on-line high-resolution NMR spectroscopy in process engineering applications
Quantitative on-line high-resolution NMR spectroscopy in process engineering applications
复制标题
过程工程应用中的定量在线高分辨率核磁共振波谱
DOI：
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发表时间：
2003
影响因子：
4.3
通讯作者：
H. Hasse
中科院分区：
文献类型：
--
作者：
M. Maiwald;Holger Fischer;Young;H. Hasse
在许多技术过程中，复杂的多组分混合物必须在例如反应或分离设备中处理。高分辨率NMR光谱是研究这些混合物并深入了解其在过程中行为的绝佳工具。对于工艺条件下的在线研究，流动NMR探头可在广泛的温度和压力范围内使用。核磁共振波谱学在工程应用中的一个主要挑战是需要定量评估。为此，必须优化在线NMR实验的流速、恢复时间和其他参数。由于在工程应用中通常禁止使用氘代溶剂，因此需要用于场均化和溶剂信号抑制的合适技术。本文介绍了在线核磁共振波谱实验在过程工程中应用的两个实例，即脱醇-水-甲醇技术重要体系的化学平衡和反应动力学研究以及CO_2在单乙醇胺水溶液中的反应性气体吸收研究。
In many technical processes, complex multicomponent mixtures have to be handled, for example, in reaction or separation equipment. High-resolution NMR spectroscopy is an excellent tool to study these mixtures and gain insight in their behavior in the processes. For on-line studies under process conditions, flow NMR probes can be used in a wide range of temperature and pressure. A major challenge in engineering applications of NMR spectroscopy is the need for quantitative evaluation. Flow rates, recovery times, and other parameters of the on-line NMR experiments have to be optimized for this purpose. Since it is generally prohibitive to use deuterated solvents in engineering applications, suitable techniques for field homogenization and solvent signal suppression are needed. Two examples for the application of on-line NMR spectroscopic experiments in process engineering are presented, studies on chemical equilibria and reaction kinetics of the technically important system formaldehyde–water–methanol and investigations on reactive gas absorption of CO2 in aqueous solutions of monoethanolamine.
影响因子：
7.4
作者：
Olson,DL;Lacey,ME;Sweedler,JV
通讯作者：
Sweedler,JV