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Materials and Hydrogen Isotope Science at Sandia's California Laboratory

Zimmerman, Jonathan A.; Balch, Dorian K.; Bartelt, Norman C.; Buchenauer, D.A.; Catarineu, Noelle R.; Cowgill, D.F.; El Gabaly Marquez, Farid E.; Karnesky, Richard A.; Kolasinski, Robert K.; Medlin, Douglas L.; Robinson, David R.; Ronevich, Joseph A.; Sabisch, Julian E.; San Marchi, Christopher W.; Sills, Ryan B.; Smith, Thale R.; Sugar, Joshua D.; Zhou, Xiaowang Z.

Abstract not provided.

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TYPE Conference Poster YEAR 2018
OSTI

A Numerical model of exchange chromatography through 3-D lattice structures

AIChE Journal

Salloum, Maher S.; Robinson, David R.

Rapid progress in the development of additive manufacturing technologies is opening new opportunities to fabricate structures that control mass transport in three dimensions across a broad range of length scales. We describe a structure that can be fabricated by newly available commercial 3-D printers. It contains an array of regular three-dimensional flow paths that are in intimate contact with a solid phase, and thoroughly shuffle material among the paths. We implement a chemically reacting flow model to study its behavior as an exchange chromatography column, and compare it to an array of 1-D flow paths that resemble more traditional honeycomb monoliths. A reaction front moves through the columns and then elutes. The front is sharper at all flow rates for the structure with three-dimensional flow paths, and this structure is more robust to channel width defects than the 1-D array. © 2018 American Institute of Chemical Engineers AIChE J, 64: 1874–1884, 2018.

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TYPE Journal Article YEAR 2018
DOIOSTIScopus

Hydrogen Isotope Exchange in a Metal Hydride Tube

Robinson, David R.

This report describes a model of the displacement of one hydrogen isotope within a metal hydride tube by a different isotope in the gas phase that is blown through the tube. The model incorporates only the most basic parameters to make a clear connection to the theory of open-tube gas chromatography, and to provide a simple description of how the behavior of the system scales with controllable parameters such as gas velocity and tube radius. A single tube can be seen as a building block for more complex architectures that provide higher molar flow rates or other advanced design goals.

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TYPE SAND Report YEAR 2017
DOIOSTI
Results 26–50 of 167
Results 26–50 of 167