Tomographic analysis of reactive flow induced pore structure changes in column experiments

Rong Cai; W. Brent Lindquist; Wooyong Um; Keith W. Jones

doi:10.1016/j.advwatres.2009.06.006

Tomographic analysis of reactive flow induced pore structure changes in column experiments

Rong Cai, W. Brent Lindquist, Wooyong Um, Keith W. Jones

Mathematics and Statistics

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28 Scopus citations

Abstract

We utilize synchrotron X-ray computed micro-tomography to capture and quantify snapshots in time of dissolution and secondary precipitation in the microstructure of Hanford sediments exposed to simulated caustic waste in flow-column experiments. The experiment is complicated somewhat as logistics dictated that the column spent significant amounts of time in a sealed state (acting as a batch reactor). Changes accompanying a net reduction in porosity of 4% were quantified including: (1) a 25% net decrease in pores resulting from a 38% loss in the number of pores < 10^{- 4} mm³ in volume and a 13% increase in the number of pores of larger size; and (2) a 38% decrease in the number of throats. The loss of throats resulted in decreased coordination number for pores of all sizes and significant reduction in the number of pore pathways.

Original language	English
Pages (from-to)	1396-1403
Number of pages	8
Journal	Advances in Water Resources
Volume	32
Issue number	9
DOIs	https://doi.org/10.1016/j.advwatres.2009.06.006
State	Published - Sep 2009

Keywords

Flow-column experiments
Reactive flow
X-ray computed micro-tomography

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10.1016/j.advwatres.2009.06.006

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title = "Tomographic analysis of reactive flow induced pore structure changes in column experiments",

abstract = "We utilize synchrotron X-ray computed micro-tomography to capture and quantify snapshots in time of dissolution and secondary precipitation in the microstructure of Hanford sediments exposed to simulated caustic waste in flow-column experiments. The experiment is complicated somewhat as logistics dictated that the column spent significant amounts of time in a sealed state (acting as a batch reactor). Changes accompanying a net reduction in porosity of 4% were quantified including: (1) a 25% net decrease in pores resulting from a 38% loss in the number of pores < 10- 4 mm3 in volume and a 13% increase in the number of pores of larger size; and (2) a 38% decrease in the number of throats. The loss of throats resulted in decreased coordination number for pores of all sizes and significant reduction in the number of pore pathways.",

keywords = "Flow-column experiments, Reactive flow, X-ray computed micro-tomography",

author = "Rong Cai and Lindquist, {W. Brent} and Wooyong Um and Jones, {Keith W.}",

note = "Funding Information: This work was supported, in part, by: the US Department of Energy under contract nos. DE-FG02-06ER64190 (WU); DE-FG02-92ER14261 (WBL); and the Research Foundation of SUNY (RC). ",

year = "2009",

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doi = "10.1016/j.advwatres.2009.06.006",

language = "English",

volume = "32",

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T1 - Tomographic analysis of reactive flow induced pore structure changes in column experiments

AU - Cai, Rong

AU - Lindquist, W. Brent

AU - Um, Wooyong

AU - Jones, Keith W.

N1 - Funding Information: This work was supported, in part, by: the US Department of Energy under contract nos. DE-FG02-06ER64190 (WU); DE-FG02-92ER14261 (WBL); and the Research Foundation of SUNY (RC).

PY - 2009/9

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N2 - We utilize synchrotron X-ray computed micro-tomography to capture and quantify snapshots in time of dissolution and secondary precipitation in the microstructure of Hanford sediments exposed to simulated caustic waste in flow-column experiments. The experiment is complicated somewhat as logistics dictated that the column spent significant amounts of time in a sealed state (acting as a batch reactor). Changes accompanying a net reduction in porosity of 4% were quantified including: (1) a 25% net decrease in pores resulting from a 38% loss in the number of pores < 10- 4 mm3 in volume and a 13% increase in the number of pores of larger size; and (2) a 38% decrease in the number of throats. The loss of throats resulted in decreased coordination number for pores of all sizes and significant reduction in the number of pore pathways.

AB - We utilize synchrotron X-ray computed micro-tomography to capture and quantify snapshots in time of dissolution and secondary precipitation in the microstructure of Hanford sediments exposed to simulated caustic waste in flow-column experiments. The experiment is complicated somewhat as logistics dictated that the column spent significant amounts of time in a sealed state (acting as a batch reactor). Changes accompanying a net reduction in porosity of 4% were quantified including: (1) a 25% net decrease in pores resulting from a 38% loss in the number of pores < 10- 4 mm3 in volume and a 13% increase in the number of pores of larger size; and (2) a 38% decrease in the number of throats. The loss of throats resulted in decreased coordination number for pores of all sizes and significant reduction in the number of pore pathways.

KW - Flow-column experiments

KW - Reactive flow

KW - X-ray computed micro-tomography

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U2 - 10.1016/j.advwatres.2009.06.006

DO - 10.1016/j.advwatres.2009.06.006

M3 - Article

AN - SCOPUS:68649104681

SN - 0309-1708

VL - 32

SP - 1396

EP - 1403

JO - Advances in Water Resources

JF - Advances in Water Resources

IS - 9

ER -

Tomographic analysis of reactive flow induced pore structure changes in column experiments

Abstract

Keywords

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