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International Conference on Gas Hydrates (ICGH) (6th : 2008)

HETEROGENEOUS NUCLEATION OF CLATHRATES FROM SUPERCOOLED THF/WATER MIXTURES AND THE EFFECT OF AN ADDED CATALYST Wilson, P.W.; Haymet, A.D.J.

Abstract

The statistics of liquid-to-crystal nucleation are measured for clathrate-forming mixtures of tetrahydrofuran and water using an automatic lag time apparatus (ALTA). We measure the nucleation temperature where a single sample is repeatedly cooled, nucleated and thawed. This is done for a series of tetrahydrofuran concentrations and in several different sample tubes since the nucleation is heterogeneous and occurring on the tube wall. The measurements are also done at the same concentrations and tubes but with an added catalyst, a single crystal of silver iodide. We discuss the need for this type of measurement if the true nucleation temperature of the clathrate is to be found. Comparisons are also made with our high pressure data on real-world clathrate formers.

Item Metadata

Title
HETEROGENEOUS NUCLEATION OF CLATHRATES FROM SUPERCOOLED THF/WATER MIXTURES AND THE EFFECT OF AN ADDED CATALYST
Creator
Wilson, P.W.; Haymet, A.D.J.
Contributor
University of British Columbia. Department of Chemical and Biological Engineering; International Conference on Gas Hydrates (6th : 2008 : Vancouver, B.C.)
Date Issued
2008-07
Description
The statistics of liquid-to-crystal nucleation are measured for clathrate-forming mixtures of tetrahydrofuran and water using an automatic lag time apparatus (ALTA). We measure the nucleation temperature where a single sample is repeatedly cooled, nucleated and thawed. This is done for a series of tetrahydrofuran concentrations and in several different sample tubes since the nucleation is heterogeneous and occurring on the tube wall. The measurements are also done at the same concentrations and tubes but with an added catalyst, a single crystal of silver iodide. We discuss the need for this type of measurement if the true nucleation temperature of the clathrate is to be found. Comparisons are also made with our high pressure data on real-world clathrate formers.
Extent
231149 bytes
Subject
ALTA; THF; Nucleation; Statistics
Genre
Conference Paper
Type
Text
File Format
application/pdf
Language
eng
Date Available
2008-07-29
Provider
Vancouver : University of British Columbia Library
Rights
Attribution-NonCommercial-NoDerivatives 4.0 International
DOI
10.14288/1.0041048
URI
http://hdl.handle.net/2429/1170
Affiliation
Non UBC
Citation
Wilson, P.W.; Haymet, A.D.J. 2008. HETEROGENEOUS NUCLEATION OF CLATHRATES FROM SUPERCOOLED THF/WATER MIXTURES AND THE EFFECT OF AN ADDED CATALYST. Proceedings of the 6th International Conference on Gas Hydrates (ICGH 2008), Vancouver, British Columbia, CANADA, July 6-10, 2008.
Peer Review Status
Unreviewed
Copyright Holder
Wilson, P.W.
Rights URI
http://creativecommons.org/licenses/by-nc-nd/4.0/
Aggregated Source Repository
DSpace

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Attribution-NonCommercial-NoDerivatives 4.0 International