Abstract
A coal-fired thermal power plant plays an important role as a stable energy resource in many countries in the world, and reduction of carbon dioxide emission from the plant is one of the essential topics in preventing global warming. Hitachi started developing technologies related to the emission reduction early 1990s and is currently demonstrating its proprietary technologies of carbon capture, collaborating with research institutes and utilities overseas as well as domestic ones. This paper introduces Hitachi's two technologies in the post-combustion process which captures carbon dioxide in flue gas of conventional coal-fired plants; a chemical absorption method and an oxy-fuel combustion one. Hitachi has developed its original solvent and process with minimum energy consumption for the chemical absorption, and has also advanced its combustion technology for oxy-fuel process.
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