Publication Date:
2017-04-04
Description:
“An edited version of this paper was published by AGU. Copyright (2009) American Geophysical Union.”
Description:
The properties of polymeric membranes and measurements of gas concentrations are common elements
of industrial processes and scientific research. Here we report a methodology whereby pressure
measurements inside a closed polymeric membrane tube can be quantitatively related to the composition of
the external gas. This approach is founded on the different rates at which the gases permeate into and out of
the interior of the polymeric tube. The difference between the amounts of gas entering and leaving the tube
triggers a pressure transient. The features of this transient depend on the species of the involved gases and
their partial pressures and under certain conditions, allow the concentration of one or more species to be
estimated. We outline the theoretical principles behind the proposed methodology and conduct laboratory
tests on a device that could be adaptable to continuous measurements of CO2 partial pressure in field
applications.
Description:
Published
Description:
Q11005
Description:
1.2. TTC - Sorveglianza geochimica delle aree vulcaniche attive
Description:
JCR Journal
Description:
open
Keywords:
gas concentration measurements
;
polymeric membranes
;
continuous monitoring
;
carbon dioxide
;
01. Atmosphere::01.01. Atmosphere::01.01.08. Instruments and techniques
;
04. Solid Earth::04.04. Geology::04.04.12. Fluid Geochemistry
;
04. Solid Earth::04.08. Volcanology::04.08.01. Gases
;
04. Solid Earth::04.08. Volcanology::04.08.06. Volcano monitoring
Repository Name:
Istituto Nazionale di Geofisica e Vulcanologia (INGV)
Type:
article
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