Post by g***@nrecridp.comhttp://us.rd.yahoo.com/dailynews/rss/search/fractals/SIG=1214j6u5i/*http%3A//www.sciencedaily.com/releases/2007/02/070207171554.htm
A new analysis led by an MIT scientist describes a mechanism for capturing carbon dioxide emissions from a power plant and injecting the gas into the ground, where it would be trapped naturally as tiny bubbles and safely stored in briny porous rock.
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NAKED ANGEL ART: http://www.rcip.com/nerdgerl
A number of people have suggested deep zone ocean injection.
geological zone.
natural co2 absorption.
http://www.lse.co.uk/ShowStory.asp?story=WU633793O&news_headline=plan_to_store_frozen_co2_beneath_seas
Post by g***@nrecridp.comPlan To Store Frozen CO2 Beneath Seas
Wednesday, 7th February 2007, 07:07
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Scientists are planning to beat global warming by storing greenhouse
gases underground in huge cases of ice.
Researchers at Leicester University say CO2 can be hidden below the
ocean in reservoirs where it can stay harmlessly for many thousands of
years.
Geologist Ameena Camp says storing CO2 in a solid form as a gas
"hydrate" - or as a pool of liquid CO 2 below a cap of hydrate
cemented sediments - offers an alternative method to the current
practices of keeping it in warm, deep sediments in the North Sea.
She said: "Hydrates - also known as clathrates - are ice-like
crystalline minerals that look like normal ice and form when gas and
water freeze together at low temperature and high pressure.
"They are made of a cage of frozen water molecules with the gas
molecules trapped inside."
Gas hydrates were first discovered two centuries ago but the possible
use of carbon dioxide hydrate as a means to help resolve problems of
global climate change have only recently been suggested.
Lab experiments by Ms Camp whose findings are published in Planet
Earth suggest carbon dioxide hydrate should form stable structures in
sediments beneath oceans.
By employing geophysical techniques and computer modelling she has
identified a number of sites in Western Europe with the potential to
store carbon dioxide by this method.
Professor Mike Lovell, of the department of geology at Leicester
University, said: "Ms Camps' work is at the forefront of gas hydrate
research and has produced some very exciting results - highlighting
the importance of investment in further studies of hydrates.
"Investigations of natural methane hydrates will help our
understanding of their role as a natural hazard - while carbon dioxide
hydrates are a potential sink for greenhouse gas emissions.
"This work also has application in other fields such as space research
into hydrates on other planetary bodies."
Underground storage of CO2 has taken place for many years as a
consequence of injecting CO 2 into oil fields to enhance recovery.
CO2 is being deliberately stored in a salt water reservoir under the
North Sea for climate change reasons. Sleipner is located in the North
Sea where Norway's Statoil strips carbon dioxide from natural gas with
amine solvents and disposes of this carbon dioxide in a saline formation.
CO2 storage as a liquid and hydrate is a more novel method of
geologically sequestering CO2 extracted from flue gases.
CO2 would be injected into depleted reservoirs or aquifers using
similar infrastructure used in the North Sea Sleipner gas field.
But injection would take place into sub-seabed sediments below deep
waters at colder temperatures where carbon dioxide is in its liquid phase.
Storage as a liquid and hydrate would allow greater volumes of gas to
be trapped within these deep water reservoirs and could remain trapped
for thousands of years.
Said Ms Camp: "As greenhouse gas emissions continue to rise and global
warming begins to take effect it is clear it will be difficult to meet
Kyoto targets and to make the much larger cuts in carbon dioxide
emissions many scientists now believe are needed to avoid dangerous
climate change.
"With the additional use of geophysical techniques and computer
modelling a vast amount of knowledge is at our
fingertips.
"Using a computer program developed to predict carbon dioxide hydrate
thickness I have identified many regions off Western Europe with
pressures and temperatures suitable for carbon dioxide hydrate formation.
"These areas have the potential to store large volumes of carbon
dioxide if this storage technology was to be developed further."
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