Comparison of kinetic and equilibrium reaction models insimulating the behavior of porous media
In this study we compare the use of kinetic and equilibriumreaction models in the simulation of gas (methane) hydrate behavior inporous media. Our objective is to evaluate through numerical simulationthe importance of employing kinetic versus equilibrium reaction modelsfor predicting the response of...
Main Authors: | , |
---|---|
Other Authors: | |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Lawrence Berkeley National Laboratory
2006
|
Subjects: | |
Online Access: | http://digital.library.unt.edu/ark:/67531/metadc902720/ |
id |
ftunivnotexas:info:ark/67531/metadc902720 |
---|---|
record_format |
openpolar |
spelling |
ftunivnotexas:info:ark/67531/metadc902720 2023-05-15T17:12:06+02:00 Comparison of kinetic and equilibrium reaction models insimulating the behavior of porous media Kowalsky, Michael B. Moridis, George J. USDOE. Assistant Secretary for Fossil Energy.Gas 2006-11-29 Text http://digital.library.unt.edu/ark:/67531/metadc902720/ English eng Lawrence Berkeley National Laboratory rep-no: LBNL--63357 grantno: DE-AC02-05CH11231 osti: 925540 http://digital.library.unt.edu/ark:/67531/metadc902720/ ark: ark:/67531/metadc902720 Journal Name: Energy Conversion and Management; Journal Volume: 48; Related Information: Journal Publication Date: 28 February2007 Natural Gas Sensitivity Saturation Stimuli 54 Hydrates Simulation Kinetics Methane Production Gas Hydrates Stimulation Depressurization Gas Hydrates Dissociation Kinetics Depressurization Thermalstimulation Surface Area Gas Hydrates Dissociation Kinetics Depressurization Thermalstimulation Article 2006 ftunivnotexas 2016-10-01T22:12:19Z In this study we compare the use of kinetic and equilibriumreaction models in the simulation of gas (methane) hydrate behavior inporous media. Our objective is to evaluate through numerical simulationthe importance of employing kinetic versus equilibrium reaction modelsfor predicting the response of hydrate-bearing systems to externalstimuli, such as changes in pressure and temperature. Specifically, we(1) analyze and compare the responses simulated using both reactionmodels for natural gas production from hydrates in various settings andfor the case of depressurization in a hydrate-bearing core duringextraction; and (2) examine the sensitivity to factors such as initialhydrate saturation, hydrate reaction surface area, and numericaldiscretization. We find that for large-scale systems undergoing thermalstimulation and depressurization, the calculated responses for bothreaction models are remarkably similar, though some differences areobserved at early times. However, for modeling short-term processes, suchas the rapid recovery of a hydrate-bearing core, kinetic limitations canbe important, and neglecting them may lead to significantunder-prediction of recoverable hydrate. Assuming validity of the mostaccurate kinetic reaction model that is currently available, the use ofthe equilibrium reaction model often appears to be justified andpreferred for simulating the behavior of gas hydrates, given that thecomputational demands for the kinetic reaction model far exceed those forthe equilibrium reaction model. Article in Journal/Newspaper Methane hydrate University of North Texas: UNT Digital Library |
institution |
Open Polar |
collection |
University of North Texas: UNT Digital Library |
op_collection_id |
ftunivnotexas |
language |
English |
topic |
Natural Gas Sensitivity Saturation Stimuli 54 Hydrates Simulation Kinetics Methane Production Gas Hydrates Stimulation Depressurization Gas Hydrates Dissociation Kinetics Depressurization Thermalstimulation Surface Area Gas Hydrates Dissociation Kinetics Depressurization Thermalstimulation |
spellingShingle |
Natural Gas Sensitivity Saturation Stimuli 54 Hydrates Simulation Kinetics Methane Production Gas Hydrates Stimulation Depressurization Gas Hydrates Dissociation Kinetics Depressurization Thermalstimulation Surface Area Gas Hydrates Dissociation Kinetics Depressurization Thermalstimulation Kowalsky, Michael B. Moridis, George J. Comparison of kinetic and equilibrium reaction models insimulating the behavior of porous media |
topic_facet |
Natural Gas Sensitivity Saturation Stimuli 54 Hydrates Simulation Kinetics Methane Production Gas Hydrates Stimulation Depressurization Gas Hydrates Dissociation Kinetics Depressurization Thermalstimulation Surface Area Gas Hydrates Dissociation Kinetics Depressurization Thermalstimulation |
description |
In this study we compare the use of kinetic and equilibriumreaction models in the simulation of gas (methane) hydrate behavior inporous media. Our objective is to evaluate through numerical simulationthe importance of employing kinetic versus equilibrium reaction modelsfor predicting the response of hydrate-bearing systems to externalstimuli, such as changes in pressure and temperature. Specifically, we(1) analyze and compare the responses simulated using both reactionmodels for natural gas production from hydrates in various settings andfor the case of depressurization in a hydrate-bearing core duringextraction; and (2) examine the sensitivity to factors such as initialhydrate saturation, hydrate reaction surface area, and numericaldiscretization. We find that for large-scale systems undergoing thermalstimulation and depressurization, the calculated responses for bothreaction models are remarkably similar, though some differences areobserved at early times. However, for modeling short-term processes, suchas the rapid recovery of a hydrate-bearing core, kinetic limitations canbe important, and neglecting them may lead to significantunder-prediction of recoverable hydrate. Assuming validity of the mostaccurate kinetic reaction model that is currently available, the use ofthe equilibrium reaction model often appears to be justified andpreferred for simulating the behavior of gas hydrates, given that thecomputational demands for the kinetic reaction model far exceed those forthe equilibrium reaction model. |
author2 |
USDOE. Assistant Secretary for Fossil Energy.Gas |
format |
Article in Journal/Newspaper |
author |
Kowalsky, Michael B. Moridis, George J. |
author_facet |
Kowalsky, Michael B. Moridis, George J. |
author_sort |
Kowalsky, Michael B. |
title |
Comparison of kinetic and equilibrium reaction models insimulating the behavior of porous media |
title_short |
Comparison of kinetic and equilibrium reaction models insimulating the behavior of porous media |
title_full |
Comparison of kinetic and equilibrium reaction models insimulating the behavior of porous media |
title_fullStr |
Comparison of kinetic and equilibrium reaction models insimulating the behavior of porous media |
title_full_unstemmed |
Comparison of kinetic and equilibrium reaction models insimulating the behavior of porous media |
title_sort |
comparison of kinetic and equilibrium reaction models insimulating the behavior of porous media |
publisher |
Lawrence Berkeley National Laboratory |
publishDate |
2006 |
url |
http://digital.library.unt.edu/ark:/67531/metadc902720/ |
genre |
Methane hydrate |
genre_facet |
Methane hydrate |
op_source |
Journal Name: Energy Conversion and Management; Journal Volume: 48; Related Information: Journal Publication Date: 28 February2007 |
op_relation |
rep-no: LBNL--63357 grantno: DE-AC02-05CH11231 osti: 925540 http://digital.library.unt.edu/ark:/67531/metadc902720/ ark: ark:/67531/metadc902720 |
_version_ |
1766068863292669952 |