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Anthropogenic activities have led to a substantial increase in carbon dioxide(CO2), a greenhouse gas (GHG), contributing to heightened concerns of globalwarming. In the last decade alone CO2 emissions increased by 2.0 ppm/yr.globally. In the year 2009, United States and China contributed up to 43.4% ofglobal CO2 emissions. CO2 capture and sequestration have been recognized aspromising solutions to mitigate CO2 emissions from fossil fuel based powerplants. Typical techniques for carbon capture include post-combustion capture,pre-combustion capture and oxy-combustion capture, which are under activeresearch globally. Mineral carbonation has been investigated as a suitabletechnique for long term storage of CO2. Sequestration is a highly energyintensive process and the additional energy is typically supplied by the powerplant itself. This leads to a reduction in net amount of CO2 captured becauseof extra CO2 emitted. This paper presents a quantitative analysis of the energyconsumption during sequestration process for a typical 1GW pulverized coal anda 1GW natural gas based power plant. Furthermore, it has been established thatthe present day sequestration methods and procedures are not viable to achievethe goal of carbon sequestration.

A Quantitative Investigation of CO2 Sequestration by Mineral Carbonation