Exploratory study of some potential environmental impacts of CO2 sequestration in unmineable coal seams

From the web site -  http://inderscience.metapress.com/app/home/contribution.asp?referrer=parent&backto=issue,10,14;journal,28,88;linkingpublicationresults,1:110851,1

International Journal of Environment and Pollution
	Issue:	Volume 29, Number 4 / 2007

		http://inderscience.metapress.com/link.asp?id=68533067269455g4

An initial investigation into the potential environmental impacts of CO2 sequestration in unmineable coal seams has been conducted, focusing on changes in the produced water during enhanced coalbed methane (ECBM) production, using a CO2 injection process (CO2-ECBM). A high volatile bituminous coal, Pittsburgh No. 8, was reacted with synthetic produced water and gaseous carbon dioxide at 40C and 50 bar to evaluate the potential for mobilisation of toxic metals during CO2-ECBM/sequestration. Microscopic and X-ray diffraction analysis of the post-reaction coal samples clearly show evidence of chemical reaction and chemical analysis of the synthetic produced water shows substantial changes in composition. These results suggest that changes to the produced water chemistry and the potential for mobilising toxic trace elements from coal beds are important factors to be considered when evaluating deep, unmineable coal seams for CO2 sequestration.

Carbon DISASTER

Lawrence Solomon: Carbon disaster

Posted: August 15, 2009, 1:38 AM by NP Editor

http://network.nationalpost.com/np/blogs/fpcomment/archive/2009/08/14/lawrence-solomon-carbon-disaster.aspx

Don’t worry about the risks of earthquakes or suffocation or water contamination. Carbon capture is good, really

By Lawrence Solomon

I

f you live in or near a community that manufactures chemicals or cement, or that has a refinery or a coal or natural gas electricity generating station, or that has abandoned mines or other suitable geological formations, you may soon be asked to save the planet from global warming by hosting an underground carbon dioxide storage facility.

You and your neighbours will be told not to worry about carbon dioxide poisoning your water supplies. Yes, ruptures or large leaks of the gas could not only make the water undrinkable for you but also kill vegetation and aquatic life, the authorities will acknowledge, but inventors are working on new, improved technology that will prevent underground pipes and other infrastructure from leaking.