Evaluation of CO2 capture technology application for exhaust gases from Petrovietnam’s coal-fired power plants
Abstract
Vietnam has excellent CO2 storage potential, concentrated in the Song Hong, Cuu Long, and Nam Con Son basins, with their total potential storage capacity reaching ~41 - 110 billion tons of CO2, and has been oriented for its development in the National Energy Master Plan. Petrovietnam has an advantage in integrating CCUS into its current petroleum value chain. CO2 capture from power plant exhaust gases can be implemented through methods such as pre-combustion capture, post-combustion capture, or oxy-fuel combustion, with post-combustion capture being the most widely applied due to its ease of integration with existing power plants. Petrovietnam's coal-fired power plants can reduce emissions through post-combustion carbon capture, using amine solution absorption technology with a capture efficiency of 90%. The total investment for a CO2 recovery plant is approximately 1.8 billion USD/plant. Carbon capture results in a 62 - 94% increase in LCOE with a carbon capture cost (LCOC) of ~ 50 - 60 USD/ton CO2 (included power plant energy usage costs of ~ 30%). Increasing coal-fired power plant operating hours and CO2 capture unit depreciation time can help reduce CO2 capture costs by 15 - 20%. To deploy carbon capture solutions from coal-fired power plant exhaust, on one hand, legal, policy, and scientific-technological improvements are needed at the government level; on the other hand, coal-fired power plants and Petrovietnam in general need to develop a comprehensive roadmap for the full development of the CCUS value chain.
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