DOI: 10.5593/SGEM2015/B41/S17.011


D.S. Stefan, I. Meghea
Friday 25 September 2015 by Libadmin2015

References: 15th International Multidisciplinary Scientific GeoConference SGEM 2015, www.sgem.org, SGEM2015 Conference Proceedings, ISBN 978-619-7105-38-4 / ISSN 1314-2704, June 18-24, 2015, Book4, 83-90 pp

Carbon dioxide represents the main gas that induces the global warming. The main sources of carbon dioxide emissions are fossil fuel combustion and other smaller industrial sources. Annual global emission growth rate is 2.4 ppm with variation determined by economic growth in emerging countries. Global emission increased by 2.9% in 2000, 1.4% in 2011 and 1.1% in 2012. Beginning with 2012 the decoupling of the increase in CO2 emissions from global economic growth took place due to more intensive use of renewable energies and increase of energetic efficiency, following the transposition of Kyoto Protocol into laws of signatory countries. Energy policies encourage and stipulate CO2 emissions reduction. At European level the CO2 emission reductions according to the European Union Emissions Trading Scheme, EU ETS, imposed issuing directives packages for the “Renewable Energy - RE” and “Efficiency Energy-EE”, Directive.
The “RE” Directive has already reduced annual emissions by 50 MtCO2 across the EU ETS scope and the “EE” Directive would increase annual emission reductions between 55 and 80 MtCO2 across the scope of the EU ETS from 2014.
Studies performed by the Intergovernmental Panel on Climate Change (IPCC) show that to stabilize the atmospheric concentration of CO2 at 350-400 ppm and limit the global mean temperature increase to 2.0-2.4 °C, the global CO2 emissions in 2050 would have to be reduced by 50-80% of the emission levels in the year 2000.
This paper presents the carbon dioxide as raw materials and case study for the methanation of flue gas resulting from limestone calcination.

Keywords: CO2 valorization, limestone calcination, capture, concentration, methanation