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Title: Method and apparatus for efficient injection of CO2 in oceans

Abstract

A liquid CO.sub.2 injection system produces a negatively buoyant consolidated stream of liquid CO.sub.2, CO.sub.2 hydrate, and water that sinks upon release at ocean depths in the range of 700-1500 m. In this approach, seawater at a predetermined ocean depth is mixed with the liquid CO.sub.2 stream before release into the ocean. Because mixing is conducted at depths where pressures and temperatures are suitable for CO.sub.2 hydrate formation, the consolidated stream issuing from the injector is negatively buoyant, and comprises mixed CO.sub.2 -hydrate/CO.sub.2 -liquid/water phases. The "sinking" characteristic of the produced stream will prolong the metastability of CO.sub.2 ocean sequestration by reducing the CO.sub.2 dissolution rate into water. Furthermore, the deeper the CO.sub.2 hydrate stream sinks after injection, the more stable it becomes internally, the deeper it is dissolved, and the more dispersed is the resulting CO.sub.2 plume. These factors increase efficiency, increase the residence time of CO2 in the ocean, and decrease the cost of CO.sub.2 sequestration while reducing deleterious impacts of free CO.sub.2 gas in ocean water.

Inventors:
; ;
Issue Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1174415
Patent Number(s):
6598407
Application Number:
09/981,126
Assignee:
UT-Battelle, LLC (Oak Ridge, TN)
Patent Classifications (CPCs):
B - PERFORMING OPERATIONS B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL B01F - MIXING, e.g. DISSOLVING, EMULSIFYING, DISPERSING
A - HUMAN NECESSITIES A01 - AGRICULTURE A01K - ANIMAL HUSBANDRY
DOE Contract Number:  
AC05-00OR22725
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; 42 ENGINEERING

Citation Formats

West, Olivia R., Tsouris, Constantinos, and Liang, Liyuan. Method and apparatus for efficient injection of CO2 in oceans. United States: N. p., 2003. Web.
West, Olivia R., Tsouris, Constantinos, & Liang, Liyuan. Method and apparatus for efficient injection of CO2 in oceans. United States.
West, Olivia R., Tsouris, Constantinos, and Liang, Liyuan. Tue . "Method and apparatus for efficient injection of CO2 in oceans". United States. https://www.osti.gov/servlets/purl/1174415.
@article{osti_1174415,
title = {Method and apparatus for efficient injection of CO2 in oceans},
author = {West, Olivia R. and Tsouris, Constantinos and Liang, Liyuan},
abstractNote = {A liquid CO.sub.2 injection system produces a negatively buoyant consolidated stream of liquid CO.sub.2, CO.sub.2 hydrate, and water that sinks upon release at ocean depths in the range of 700-1500 m. In this approach, seawater at a predetermined ocean depth is mixed with the liquid CO.sub.2 stream before release into the ocean. Because mixing is conducted at depths where pressures and temperatures are suitable for CO.sub.2 hydrate formation, the consolidated stream issuing from the injector is negatively buoyant, and comprises mixed CO.sub.2 -hydrate/CO.sub.2 -liquid/water phases. The "sinking" characteristic of the produced stream will prolong the metastability of CO.sub.2 ocean sequestration by reducing the CO.sub.2 dissolution rate into water. Furthermore, the deeper the CO.sub.2 hydrate stream sinks after injection, the more stable it becomes internally, the deeper it is dissolved, and the more dispersed is the resulting CO.sub.2 plume. These factors increase efficiency, increase the residence time of CO2 in the ocean, and decrease the cost of CO.sub.2 sequestration while reducing deleterious impacts of free CO.sub.2 gas in ocean water.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2003},
month = {7}
}

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Works referenced in this record:

Hydrate Formation from Gaseous CO 2 and Water
journal, May 1999


Advanced CO2 ocean dissolution technology for longer term sequestration with minimum biological impacts
book, January 1999


Near field impacts of reduced pH from ocean CO2 disposal
journal, January 1997


A new experimental facility for investigating the formation and properties of gas hydrates under simulated seafloor conditions
journal, January 2001