Permanent Sequestration of Emitted Gases in the Form of Clathrate Hydrates
Underground sequestration has been proposed as a novel method of permanent disposal of harmful gases emitted into the atmosphere as a result of human activity. The method was conceived primarily for disposal of carbon dioxide (CO2, greenhouse gas causing global warming), but could also be applied to...
Main Authors: | , |
---|---|
Format: | Other/Unknown Material |
Language: | unknown |
Published: |
2004
|
Subjects: | |
Online Access: | http://hdl.handle.net/2060/20110016732 |
id |
ftnasantrs:oai:casi.ntrs.nasa.gov:20110016732 |
---|---|
record_format |
openpolar |
spelling |
ftnasantrs:oai:casi.ntrs.nasa.gov:20110016732 2023-05-15T17:56:36+02:00 Permanent Sequestration of Emitted Gases in the Form of Clathrate Hydrates Duxbury, N. Romanovsky, V. Unclassified, Unlimited, Publicly available February 2004 application/pdf http://hdl.handle.net/2060/20110016732 unknown Document ID: 20110016732 http://hdl.handle.net/2060/20110016732 Copyright, Distribution as joint owner in the copyright CASI Environment Pollution NPO-30256 NASA Tech Briefs, February 2004; 29-30 2004 ftnasantrs 2019-07-21T06:26:14Z Underground sequestration has been proposed as a novel method of permanent disposal of harmful gases emitted into the atmosphere as a result of human activity. The method was conceived primarily for disposal of carbon dioxide (CO2, greenhouse gas causing global warming), but could also be applied to CO, H2S, NOx, and chorofluorocarbons (CFCs, which are super greenhouse gases). The method is based on the fact that clathrate hydrates (e.g., CO2 6H2O) form naturally from the substances in question (e.g., CO2) and liquid water in the pores of sub-permafrost rocks at stabilizing pressures and temperatures. The proposed method would be volumetrically efficient: In the case of CO2, each volume of hydrate can contain as much as 184 volumes of gas. Temperature and pressure conditions that favor the formation of stable clathrate hydrates exist in depleted oil reservoirs that lie under permafrost. For example, CO2-6H2O forms naturally at a temperature of 0 C and pressure of 1.22 MPa. Using this measurement, it has been calculated that the minimum thickness of continuous permafrost needed to stabilize CO2 clathrate hydrate is only about 100 m, and the base of the permafrost is known to be considerably deeper at certain locations (e.g., about 600 m at Prudhoe Bay in Alaska). In this disposal method, the permafrost layers over the reservoirs would act as impermeable lids that would prevent dissociation of the clathrates and diffusion of the evolved gases up through pores. Other/Unknown Material permafrost Prudhoe Bay Alaska NASA Technical Reports Server (NTRS) |
institution |
Open Polar |
collection |
NASA Technical Reports Server (NTRS) |
op_collection_id |
ftnasantrs |
language |
unknown |
topic |
Environment Pollution |
spellingShingle |
Environment Pollution Duxbury, N. Romanovsky, V. Permanent Sequestration of Emitted Gases in the Form of Clathrate Hydrates |
topic_facet |
Environment Pollution |
description |
Underground sequestration has been proposed as a novel method of permanent disposal of harmful gases emitted into the atmosphere as a result of human activity. The method was conceived primarily for disposal of carbon dioxide (CO2, greenhouse gas causing global warming), but could also be applied to CO, H2S, NOx, and chorofluorocarbons (CFCs, which are super greenhouse gases). The method is based on the fact that clathrate hydrates (e.g., CO2 6H2O) form naturally from the substances in question (e.g., CO2) and liquid water in the pores of sub-permafrost rocks at stabilizing pressures and temperatures. The proposed method would be volumetrically efficient: In the case of CO2, each volume of hydrate can contain as much as 184 volumes of gas. Temperature and pressure conditions that favor the formation of stable clathrate hydrates exist in depleted oil reservoirs that lie under permafrost. For example, CO2-6H2O forms naturally at a temperature of 0 C and pressure of 1.22 MPa. Using this measurement, it has been calculated that the minimum thickness of continuous permafrost needed to stabilize CO2 clathrate hydrate is only about 100 m, and the base of the permafrost is known to be considerably deeper at certain locations (e.g., about 600 m at Prudhoe Bay in Alaska). In this disposal method, the permafrost layers over the reservoirs would act as impermeable lids that would prevent dissociation of the clathrates and diffusion of the evolved gases up through pores. |
format |
Other/Unknown Material |
author |
Duxbury, N. Romanovsky, V. |
author_facet |
Duxbury, N. Romanovsky, V. |
author_sort |
Duxbury, N. |
title |
Permanent Sequestration of Emitted Gases in the Form of Clathrate Hydrates |
title_short |
Permanent Sequestration of Emitted Gases in the Form of Clathrate Hydrates |
title_full |
Permanent Sequestration of Emitted Gases in the Form of Clathrate Hydrates |
title_fullStr |
Permanent Sequestration of Emitted Gases in the Form of Clathrate Hydrates |
title_full_unstemmed |
Permanent Sequestration of Emitted Gases in the Form of Clathrate Hydrates |
title_sort |
permanent sequestration of emitted gases in the form of clathrate hydrates |
publishDate |
2004 |
url |
http://hdl.handle.net/2060/20110016732 |
op_coverage |
Unclassified, Unlimited, Publicly available |
genre |
permafrost Prudhoe Bay Alaska |
genre_facet |
permafrost Prudhoe Bay Alaska |
op_source |
CASI |
op_relation |
Document ID: 20110016732 http://hdl.handle.net/2060/20110016732 |
op_rights |
Copyright, Distribution as joint owner in the copyright |
_version_ |
1766164810580361216 |