Formation and Dissociation of CO2 and CO2-THF Hydrates Compared to CH4 and CH4-THF Hydrates.
This work is part of a research project sponsored by the Italian Electricity Agency for CO2 disposal in form of hydrate. The dissociation behavior of CH4 hydrate was taken as a reference for the study of the CO2 hydrate preservation. The formation and dissociation of CO2 and CO2–THF mixed hydrates,...
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John Ripmeester and Peter Englezos
2008
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ftunivromairis:oai:iris.uniroma1.it:11573/360077 2024-05-19T07:44:01+00:00 Formation and Dissociation of CO2 and CO2-THF Hydrates Compared to CH4 and CH4-THF Hydrates. GIAVARINI, Carlo MACCIONI, Filippo BROGGI, ALESSANDRA POLITI M. Giavarini, Carlo Maccioni, Filippo Broggi, Alessandra Politi, M. 2008 ELETTRONICO http://hdl.handle.net/11573/360077 http://hdl.handle.net/2429/2323 eng eng John Ripmeester and Peter Englezos place:VANCOUVER ispartofbook:Proceedings of the 6th International Conference on Gas Hydrates (ICGH 2008) http://hdl.handle.net/11573/360077 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-84872138575 http://hdl.handle.net/2429/2323 HYDRATE info:eu-repo/semantics/conferenceObject 2008 ftunivromairis 2024-04-25T00:06:31Z This work is part of a research project sponsored by the Italian Electricity Agency for CO2 disposal in form of hydrate. The dissociation behavior of CH4 hydrate was taken as a reference for the study of the CO2 hydrate preservation. The formation and dissociation of CO2 and CO2–THF mixed hydrates, compared to CH4 and CH4 – THF mixed hydrates, has been considered. The experimental tests were performed in a 2 liter reaction calorimeter at pressures between 0.1 and 0.3 MPa. The dissociation has been followed at temperatures from -3 °C to 0 °C for CO2 and CH4 hydrates, and from -3 °C to 10 °C for THF mixed hydrates. More than pressure, which is very important for methane hydrates, temperature affects the preservation of CO2 and CO2–THF mixed hydrates. Subcooling after formation is important for methane hydrate preservation, but it does not substantially affect CO2 hydrate stability. In the studied P, T range, CO2 hydrate does not present any anomalous self-preservation effect. The mixtures containing more ice show a slower dissociation rate. Methane hydrate requires less energy to dissociate than CO2 hydrate and, therefore, is less stable. On the contrary, the mixed CO2 – THF hydrates are less stable than the mixed methane hydrates. Modulated differential scanning calorimetry (MDSC) has been used for hydrate characterization: both CH4 and CO2 hydrates include two decomposition peaks, the first due to the melting of the ice and the second to the decomposition of the hydrate. The higher temperature of the decomposition peak of CO2 hydrate confirms its higher stability respect to CH4 hydrate. Conference Object Methane hydrate Sapienza Università di Roma: CINECA IRIS |
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Sapienza Università di Roma: CINECA IRIS |
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ftunivromairis |
language |
English |
topic |
HYDRATE |
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HYDRATE GIAVARINI, Carlo MACCIONI, Filippo BROGGI, ALESSANDRA POLITI M. Formation and Dissociation of CO2 and CO2-THF Hydrates Compared to CH4 and CH4-THF Hydrates. |
topic_facet |
HYDRATE |
description |
This work is part of a research project sponsored by the Italian Electricity Agency for CO2 disposal in form of hydrate. The dissociation behavior of CH4 hydrate was taken as a reference for the study of the CO2 hydrate preservation. The formation and dissociation of CO2 and CO2–THF mixed hydrates, compared to CH4 and CH4 – THF mixed hydrates, has been considered. The experimental tests were performed in a 2 liter reaction calorimeter at pressures between 0.1 and 0.3 MPa. The dissociation has been followed at temperatures from -3 °C to 0 °C for CO2 and CH4 hydrates, and from -3 °C to 10 °C for THF mixed hydrates. More than pressure, which is very important for methane hydrates, temperature affects the preservation of CO2 and CO2–THF mixed hydrates. Subcooling after formation is important for methane hydrate preservation, but it does not substantially affect CO2 hydrate stability. In the studied P, T range, CO2 hydrate does not present any anomalous self-preservation effect. The mixtures containing more ice show a slower dissociation rate. Methane hydrate requires less energy to dissociate than CO2 hydrate and, therefore, is less stable. On the contrary, the mixed CO2 – THF hydrates are less stable than the mixed methane hydrates. Modulated differential scanning calorimetry (MDSC) has been used for hydrate characterization: both CH4 and CO2 hydrates include two decomposition peaks, the first due to the melting of the ice and the second to the decomposition of the hydrate. The higher temperature of the decomposition peak of CO2 hydrate confirms its higher stability respect to CH4 hydrate. |
author2 |
Giavarini, Carlo Maccioni, Filippo Broggi, Alessandra Politi, M. |
format |
Conference Object |
author |
GIAVARINI, Carlo MACCIONI, Filippo BROGGI, ALESSANDRA POLITI M. |
author_facet |
GIAVARINI, Carlo MACCIONI, Filippo BROGGI, ALESSANDRA POLITI M. |
author_sort |
GIAVARINI, Carlo |
title |
Formation and Dissociation of CO2 and CO2-THF Hydrates Compared to CH4 and CH4-THF Hydrates. |
title_short |
Formation and Dissociation of CO2 and CO2-THF Hydrates Compared to CH4 and CH4-THF Hydrates. |
title_full |
Formation and Dissociation of CO2 and CO2-THF Hydrates Compared to CH4 and CH4-THF Hydrates. |
title_fullStr |
Formation and Dissociation of CO2 and CO2-THF Hydrates Compared to CH4 and CH4-THF Hydrates. |
title_full_unstemmed |
Formation and Dissociation of CO2 and CO2-THF Hydrates Compared to CH4 and CH4-THF Hydrates. |
title_sort |
formation and dissociation of co2 and co2-thf hydrates compared to ch4 and ch4-thf hydrates. |
publisher |
John Ripmeester and Peter Englezos |
publishDate |
2008 |
url |
http://hdl.handle.net/11573/360077 http://hdl.handle.net/2429/2323 |
genre |
Methane hydrate |
genre_facet |
Methane hydrate |
op_relation |
ispartofbook:Proceedings of the 6th International Conference on Gas Hydrates (ICGH 2008) http://hdl.handle.net/11573/360077 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-84872138575 http://hdl.handle.net/2429/2323 |
_version_ |
1799483772745285632 |