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Issue 23, 2017
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Determination of pore-scale hydrate phase equilibria in sediments using lab-on-a-chip technology

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Abstract

We present an experimental protocol for fast determination of hydrate stability in porous media for a range of pressure and temperature (P, T) conditions. Using a lab-on-a-chip approach, we gain direct optical access to dynamic pore-scale hydrate formation and dissociation events to study the hydrate phase equilibria in sediments. Optical pore-scale observations of phase behavior reproduce the theoretical hydrate stability line with methane gas and distilled water, and demonstrate the accuracy of the new method. The procedure is applicable for any kind of hydrate transitions in sediments, and may be used to map gas hydrate stability zones in nature.

Graphical abstract: Determination of pore-scale hydrate phase equilibria in sediments using lab-on-a-chip technology

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Article information


Submitted
11 Jul 2017
Accepted
15 Oct 2017
First published
16 Oct 2017

Lab Chip, 2017,17, 4070-4076
Article type
Paper

Determination of pore-scale hydrate phase equilibria in sediments using lab-on-a-chip technology

S. Almenningen, J. Flatlandsmo, A. R. Kovscek, G. Ersland and M. A. Fernø, Lab Chip, 2017, 17, 4070
DOI: 10.1039/C7LC00719A

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