Carbon capture and storage (CCS) is a significant technology in the limitation of greenhouse gases in the atmosphere worldwide. A carbon capture and storage system consists of four general processes: carbon capture, carbon compression and transport, carbon injection, and carbon storage. Implementation of carbon capture and storage technologies with the aim to minimise carbon dioxide emissions in the atmosphere might influence the national energy sector both from an economic and environmental point of view. This paper provides the methodology for the evaluation of cost scenarios of natural gas, coal and biomass power plants with different capture technologies used - post combustion monoethanolamine (MEA) solvent capture, chemical - looping capture, pre-combustion monoethanolamine (MEA) solvent capture and pre-combustion methyldiethanolamine (MDEA) capture. The results of the paper show the CO2 reduction potential from 2015 to 2020 and present the factors affecting the cost of electricity related to the introduction of CCS in Latvia
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