생태독성을 고려한 CCS 전과정 영향평가 방법론 개발 연구

Abstract

Carbon capture and storage(CCS) is a technique that aims to capture carbon dioxide(C02) from emissions and store it somewhere, thus it attracts public attention as a reduction method of the greenhouse gases(GHGs). To achieve GHGs reduction goal complying with 2005 level by 2050，internationally it is forecasted that CCS will reduce 19% of total greenhouse gas. Also, South Korea has a plan to reduce 32 million tons of CO2 emission, which is 10% of total national GHGs, by using CCS techniques by 2030. There many technical efforts and researches for CCS system for GHGs reduction, however, there has been little study on ecological and environmental impact assessment and research for CCS system. The CO2 storage at underground and deep saline aquifer can contribute for GHGs emission reduction, however, the CO2 leak from storage can affect ecological system and this cause other serious problems. Also we cannot expect its impacts. Therefore, in this study, we suggested a life cycle impact assessment method, which can be applied to the CCS system, as not a global warming emission but an ecotoxicity factor for CO2 emission. When CO2 emission is considering as an ecotoxicity emission, first we can identify the quantity and concentration of CO2, and then it can be translated to l,4-dichlorobenzene(DCB) equivalent value, which is ecotoxicity characterization factor. This life cycle impact assessment method can be applied to CCS system effectively. By using this suggested life cycle impact assessment method in this study, we can interpret in terms of global warming and ecotoxicity aspects and it will contribute for safe CCS technology development.