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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ftunivbritcolcir:oai:circle.library.ubc.ca:2429/2323 2023-05-15T17:11:55+02:00 FORMATION AND DISSOCIATION OF CO2 AND CO2 – THF HYDRATES COMPARED TO CH4 AND CH4 - THF HYDRATES Giavarini, Carlo Maccioni, Filippo Broggi, Alessandra Politi, Monia University of British Columbia. Department of Chemical and Biological Engineering International Conference on Gas Hydrates (6th : 2008 : Vancouver, B.C.) 2008-07 243431 bytes application/pdf http://hdl.handle.net/2429/2323 eng eng Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/ Giavarini, Carlo CC-BY-NC-ND CO2 THF CH4 Dissociation rate MDSC Text Conference Paper 2008 ftunivbritcolcir 2019-10-15T17:43:57Z 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. Non UBC Unreviewed Conference Object Methane hydrate University of British Columbia: cIRcle - UBC's Information Repository |
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University of British Columbia: cIRcle - UBC's Information Repository |
op_collection_id |
ftunivbritcolcir |
language |
English |
topic |
CO2 THF CH4 Dissociation rate MDSC |
spellingShingle |
CO2 THF CH4 Dissociation rate MDSC Giavarini, Carlo Maccioni, Filippo Broggi, Alessandra Politi, Monia FORMATION AND DISSOCIATION OF CO2 AND CO2 – THF HYDRATES COMPARED TO CH4 AND CH4 - THF HYDRATES |
topic_facet |
CO2 THF CH4 Dissociation rate MDSC |
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. Non UBC Unreviewed |
author2 |
University of British Columbia. Department of Chemical and Biological Engineering International Conference on Gas Hydrates (6th : 2008 : Vancouver, B.C.) |
format |
Conference Object |
author |
Giavarini, Carlo Maccioni, Filippo Broggi, Alessandra Politi, Monia |
author_facet |
Giavarini, Carlo Maccioni, Filippo Broggi, Alessandra Politi, Monia |
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 |
publishDate |
2008 |
url |
http://hdl.handle.net/2429/2323 |
genre |
Methane hydrate |
genre_facet |
Methane hydrate |
op_rights |
Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/ Giavarini, Carlo |
op_rightsnorm |
CC-BY-NC-ND |
_version_ |
1766068671864635392 |