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Measurement of clathrate hydrate precipitation from CO (sub 2) solution by a nondestructive method

Yongchen Song, Baixin Chen, Masahiro Nishio and Makoto Akai
Measurement of clathrate hydrate precipitation from CO (sub 2) solution by a nondestructive method (in Clathrate hydrates special issue, Bryan C. Chakoumakos)
American Mineralogist (September 2004) 89 (8-9): 1247-1253

Abstract

Using recorded data of pressure and temperature, we developed a nondestructive method to estimate the precipitation rate of carbon dioxide (CO (sub 2) ) hydrate by considering the CO (sub 2) solution density equation in association with the mass conservation equation. We applied this method to the investigation of the dynamic process of clathrate hydrate precipitation from CO (sub 2) solution using a high-pressure dissolution system consisting of a high-pressure vessel and optical detecting instruments. The role of stirring was examined. The temperatures studied in the experiments were from 275 to 288 K over a pressure range of 4-8 MPa. Experimental results showed that our method can quantitatively monitor this dynamic process. The volume ratio of precipitated hydrate to that of the pressure-vessel approached 0.09 when a steady state was reached, which took about 100 seconds; more than 60% of the total clathrate hydrate precipitated within 10 seconds at the cooling rates of this experiment. For precipitation, stirring enhanced the cooling and led to a large hydrate precipitation rate from 0.004 to 0.008 in volume ratio per second. For nucleation, however, the residual structure of the solution decreased the amount of hysteresis in the formation of hydrate nuclei during supercooling, of which induction times were reduced by 4-9 minutes.


ISSN: 0003-004X
EISSN: 1945-3027
Coden: AMMIAY
Serial Title: American Mineralogist
Serial Volume: 89
Serial Issue: 8-9
Title: Measurement of clathrate hydrate precipitation from CO (sub 2) solution by a nondestructive method
Title: Clathrate hydrates special issue
Author(s): Song, YongchenChen, BaixinNishio, MasahiroAkai, Makoto
Author(s): Chakoumakos, Bryan C.
Affiliation: National Institute of Advanced Industrial Science and Technology, Tsukuba, Japan
Affiliation: Oak Ridge National Laboratory, Condensed Matter Sciences Division, Oak Ridge, TN, United States
Pages: 1247-1253
Published: 200409
Text Language: English
Publisher: Mineralogical Society of America, Washington, DC, United States
References: 28
Accession Number: 2004-076550
Categories: General geochemistry
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus.
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2018, American Geosciences Institute.
Update Code: 200422
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