Neutralizing Carbonic Acid in Deep Carbonate Strata below the North Atlantic Annual Technical Report: 2005
Our research is aimed at investigating several technical issues associated with carbon dioxide sequestration in calcium carbonate sediments below the sea floor through laboratory experiments and chemical transport modeling. Our goal is to evaluate the basic feasibility of this approach, including an...
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President and Fellows of Harvard College
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ftunivnotexas:info:ark/67531/metadc878938 2023-05-15T15:52:31+02:00 Neutralizing Carbonic Acid in Deep Carbonate Strata below the North Atlantic Annual Technical Report: 2005 Neutralizing Carbonic Acid in Deep Carbonate Strata below the North Atlantic Annual Report Schrag, Daniel P. United States. Department of Energy. 2004-07-15/2005-07-14 2005-12-01 Text https://doi.org/10.2172/876075 https://digital.library.unt.edu/ark:/67531/metadc878938/ English eng President and Fellows of Harvard College grantno: FG26-04NT42123 doi:10.2172/876075 osti: 876075 https://digital.library.unt.edu/ark:/67531/metadc878938/ ark: ark:/67531/metadc878938 Atlantic Ocean Carbon Sequestration Sediments Carbon Dioxide Site Selection Dissolution Kinetics Geochemistry Carbonic Acid 54 Environmental Sciences Gas Injection Flow Models Calcium Carbonates Report 2005 ftunivnotexas https://doi.org/10.2172/876075 2019-06-29T22:08:27Z Our research is aimed at investigating several technical issues associated with carbon dioxide sequestration in calcium carbonate sediments below the sea floor through laboratory experiments and chemical transport modeling. Our goal is to evaluate the basic feasibility of this approach, including an assessment of optimal depths, sediment types, and other issues related to site selection. Through laboratory and modeling efforts, we are studying the flow of liquid carbon dioxide and carbon dioxide-water mixtures through calcium carbonate sediments to better understand the geomechanical and structural stability of the sediments during and after injection. Our modeling efforts in the first year show that the idea is feasible, but requires more sophisticated analysis of fluid flow at high pressure in deep sea sediments. In addition, we are investigating the kinetics of calcium carbonate dissolution in the presence of CO{sub 2}-water fluids, which is a critical feature of the system as it allows for increased permeability during injection. Our experimental results from the first year of work have shown that the kinetics are likely to be fast enough to create dissolution which will affect permeability. However, additional experiments are needed at high pressures, which will be a focus for years 2 and 3. We are also investigating the possibility of carbon dioxide hydrate formation in the pore fluid, which might complicate the injection procedure by reducing sediment permeability but might also provide an upper seal in the sediment-pore fluid system, preventing release of CO{sub 2} into the deep ocean, particularly if depth and temperature at the injection point rule out immediate hydrate formation. Finally, we are in the beginning stages of an economic analysis to estimate costs of drilling and gas injection, site monitoring as well as the availability of potential disposal sites with particular emphasis on those sites that are within the 200-mile economic zone of the United States. Report Carbonic acid North Atlantic University of North Texas: UNT Digital Library |
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University of North Texas: UNT Digital Library |
op_collection_id |
ftunivnotexas |
language |
English |
topic |
Atlantic Ocean Carbon Sequestration Sediments Carbon Dioxide Site Selection Dissolution Kinetics Geochemistry Carbonic Acid 54 Environmental Sciences Gas Injection Flow Models Calcium Carbonates |
spellingShingle |
Atlantic Ocean Carbon Sequestration Sediments Carbon Dioxide Site Selection Dissolution Kinetics Geochemistry Carbonic Acid 54 Environmental Sciences Gas Injection Flow Models Calcium Carbonates Schrag, Daniel P. Neutralizing Carbonic Acid in Deep Carbonate Strata below the North Atlantic Annual Technical Report: 2005 |
topic_facet |
Atlantic Ocean Carbon Sequestration Sediments Carbon Dioxide Site Selection Dissolution Kinetics Geochemistry Carbonic Acid 54 Environmental Sciences Gas Injection Flow Models Calcium Carbonates |
description |
Our research is aimed at investigating several technical issues associated with carbon dioxide sequestration in calcium carbonate sediments below the sea floor through laboratory experiments and chemical transport modeling. Our goal is to evaluate the basic feasibility of this approach, including an assessment of optimal depths, sediment types, and other issues related to site selection. Through laboratory and modeling efforts, we are studying the flow of liquid carbon dioxide and carbon dioxide-water mixtures through calcium carbonate sediments to better understand the geomechanical and structural stability of the sediments during and after injection. Our modeling efforts in the first year show that the idea is feasible, but requires more sophisticated analysis of fluid flow at high pressure in deep sea sediments. In addition, we are investigating the kinetics of calcium carbonate dissolution in the presence of CO{sub 2}-water fluids, which is a critical feature of the system as it allows for increased permeability during injection. Our experimental results from the first year of work have shown that the kinetics are likely to be fast enough to create dissolution which will affect permeability. However, additional experiments are needed at high pressures, which will be a focus for years 2 and 3. We are also investigating the possibility of carbon dioxide hydrate formation in the pore fluid, which might complicate the injection procedure by reducing sediment permeability but might also provide an upper seal in the sediment-pore fluid system, preventing release of CO{sub 2} into the deep ocean, particularly if depth and temperature at the injection point rule out immediate hydrate formation. Finally, we are in the beginning stages of an economic analysis to estimate costs of drilling and gas injection, site monitoring as well as the availability of potential disposal sites with particular emphasis on those sites that are within the 200-mile economic zone of the United States. |
author2 |
United States. Department of Energy. |
format |
Report |
author |
Schrag, Daniel P. |
author_facet |
Schrag, Daniel P. |
author_sort |
Schrag, Daniel P. |
title |
Neutralizing Carbonic Acid in Deep Carbonate Strata below the North Atlantic Annual Technical Report: 2005 |
title_short |
Neutralizing Carbonic Acid in Deep Carbonate Strata below the North Atlantic Annual Technical Report: 2005 |
title_full |
Neutralizing Carbonic Acid in Deep Carbonate Strata below the North Atlantic Annual Technical Report: 2005 |
title_fullStr |
Neutralizing Carbonic Acid in Deep Carbonate Strata below the North Atlantic Annual Technical Report: 2005 |
title_full_unstemmed |
Neutralizing Carbonic Acid in Deep Carbonate Strata below the North Atlantic Annual Technical Report: 2005 |
title_sort |
neutralizing carbonic acid in deep carbonate strata below the north atlantic annual technical report: 2005 |
publisher |
President and Fellows of Harvard College |
publishDate |
2005 |
url |
https://doi.org/10.2172/876075 https://digital.library.unt.edu/ark:/67531/metadc878938/ |
op_coverage |
2004-07-15/2005-07-14 |
genre |
Carbonic acid North Atlantic |
genre_facet |
Carbonic acid North Atlantic |
op_relation |
grantno: FG26-04NT42123 doi:10.2172/876075 osti: 876075 https://digital.library.unt.edu/ark:/67531/metadc878938/ ark: ark:/67531/metadc878938 |
op_doi |
https://doi.org/10.2172/876075 |
_version_ |
1766387677231316992 |