Commutator expansions in NMR diffusometry

Noncommutative Geometry Based on Commutator Expansions

Exploring Mass Transfer in Mesoporous Zeolites by NMR Diffusometry

With the advent of mesoporous zeolites, the exploration of their transport properties has become a task of primary importance for the auspicious application of such materials in separation technology and heterogeneous catalysis. After reviewing the potential of the pulsed field gradient method of NMR (PFG NMR) for this purpose in general, in a case study using a specially prepared mesoporous ze...

Varying the Gradient Pulse Length Gives Valuable Information in NMR Diffusometry

1. Introduction NMR diffusometry has evolved to become one of the most important methods in the study of diffusion and flow of liquids in complex material. Material that may be investigated spans a broad range: From rocks to soft biological material. In the latter case, one is often faced with a problem of trying to separate effects from inhomogeneities and restrictions. In the former case, we ...

Signals in Post-War Ruins, Five Orders of Magnitude and Pore Spaces Explored by NMR Diffusometry

The 10 Bologna Conference on “Magnetic Resonance in Porous Media” was among the impressive events which, dedicated to the 600 anniversary of Leipzig University in December 2009, attracted colleagues from all over the world. The conference excursion took the participants to Ferropolis, a place north of Leipzig, equipped with impressive remainings of an old mining site, including huge conveyer br...

Spatially resolved multidimensional NMR relaxometry and diffusometry for rock core analysis at high temperatures and pressures

MacDiarmid Institute for Advanced Materials and Nanotechnology, School of Chemical and Physical Sciences, Victoria University of Wellington, Wellington, New Zealand, Magritek Ltd., Wellington, New Zealand Fluids confined in reservoir rocks may differ significantly in their properties depending on temperature or pressure [1,2]. Here we report on a setup allowing to saturate and flood rock cores ...