국내 CO2 임시저장시설의 하역장치와 저장탱크의 잠재적 위험요소 분석

Abstract

Carbon Capture and Storage (CCS) is regarded as one of key technologies to meet global greenhouse gas emission reduction goal. In this manner, South Korea is developing a one-million-ton-scale offshore CCS project to reduce national greenhouse gas emission, entitled the Korea Clean Carbon Storage Project (KCCS) 2025. In this project, the CO2 is captured from power plants on coast, loaded to CO2 carriers, and transported to an intermediate storage terminal, which is located on shoreline nearby offshore storage reservoirs at the Ulleung Basin. Then the CO2 is exported via an offshore pipeline to offshore platform for injection to geological storage site for a permanent containment. Since the concept of the KCCS 2025 includes CO2 carriers as a transportation method, it requires an intermediate storage terminal that receives the CO2 from carrier and send out continuous CO2 flow to the offshore pipeline after the pressurization of CO2 to higher than 100 bar. The intermediate storage terminal will consist of 1) unloading system, 2) CO2 storage tanks, 3) LP pumps, 4) a reliquefaction package, 5) a vent stack and 6) HP pump & injection pump (a booster station). Because there are few actual projects with an intermediate storage terminal worldwide, researches on intermediate storage facilities are insufficient. To support an optimal concept design of the intermediate storage terminal for the KCCS 2025, this study identified th