Presented at GasTech Centre of Technical Excellence 23 March 2011
Wilfried Maas, Yasaman Mirfendereski, Burkard Schlange, Shell Global Solutions
In order to achieve 80 % CO2eq reduction in developed countries by 2050 timeframe, various CO2 management options are required. Fossil fuels play a key part in providing the world’s energy demand; however they are the major contributors to the ascending CO2 emissions. Given that around one third of the world’s CO2 emissions come from power generation, the power sector is the first target when it comes to CO2 emission reduction from fossil fuels. De-carbonizing power generation by natural gas to replace coal in the power sector has been already highlighted. However, to meet the power emission performance intensities required for deeper decarbonisation scenarios, such as the IEA 450 ppm, CCS for Gas to Power is essential, enabling positioning the fossil gas as a destination fuel in the power energy mix.
The presentation will cover a techno economic evaluation of CCS for natural gas fired combined cycle gas turbine (CCGT) focusing on post combustion CO2 capture technology. The applied CO2 capture process is an amine-based technology with a conventional absorption and regeneration set-up. In this respect, the technology specific elements are addressed including implications of both low CO2 concentration and high Oxygen concentration of CCGT flue gases, intermittency, integration of capture plant and utilities integration. It is, further, argued that the CO2 capture solution to meet the green house gas targets may require a different optimization than a conventional gas treating solution.
An analysis of the different economic assessments for CCS power, specifically on LCOE (Levelised Cost of Electricity) and capture costs ($/tonCO2) will be shared. In addition, cost comparisons will be presented with CCS for coal to power, but also with renewable power and their intermittency solutions.
Furthermore, the importance of technology demonstrations of CCS for gas to power for validating and quantifying the technology elements, and exploring the cost reduction opportunities will be discussed.
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