대한조선학회논문집 (Journal of the Society of Naval Architects of Korea)

  • 제61권1호
  • /
  • Pages.51-60
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  • 2024
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  • 1225-1143(pISSN)
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  • 2287-7355(eISSN)
대한조선학회 (The Society of Naval Architects of Korea)
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가성소다(NaOH) 용액을 이용한 선상 이산화탄소 포집 장치의 선박 검증시험

Shipboard Verification Test of Onboard Carbon Dioxide Capture System (OCCS) Using Sodium Hydroxide(NaOH) Solution

  • 투고 : 2023.06.21
  • 심사 : 2023.12.19
  • 발행 : 2024.02.20
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초록

Hi Air Korea and Hanwha ocean are currently developing an Onboard Carbon dioxide Capture System (OCCS) to absorb CO2 emitted from ship's engine using a sodium hydroxide(NaOH) solution, and converting the resulting salt into a solid form through a chemical reaction with calcium oxide (CaO). The system process involves the following steps; 1)The reaction of CO2 gas absorption in water, 2)The reaction between carbonic acid (H2CO3) and NaOH solution to produce carbonate or bicarbonate, and 3)The reaction between carbonate or bicarbonate and CaO to form calcium carbonate (CaCO3). And ultimately, the solid material, CaCO3, is separated and discharged using a separator. The OCCS has been installed on an ship and the test results have confirmed significant reduction effects of CO2 in the ship's exhaust gas. A portion of the exhaust gas emitted from the engine was transferred to the OCCS using a blower. The flow rate of the transferred gas ranged from 800 to 1384 m3/hr, and the CO2 concentration in the exhaust gas was 5.1 vol% for VLSFO, 3.7 vol% for LNG and a 12 wt% NaOH solution was used. The results showed a CO2 capture efficiency of approximately 42.5 to 64.1 vol% and the CO2 capture rate approximately 48.4 to 52.2kg/hr. Additionally, to assess the impact of the discharged CaCO3on the marine ecosystem, we conducted "marine ecotoxicity test" and performed Computational Fluid Dynamics (CFD) analysis to evaluate the dispersion and dilution of the discharged effluent.

키워드

과제정보

선박용 이산화탄소 포집장치(OCCS) 개발을 공동 수행한 한화오션(구 대우조선해양, DSME), 생성물 해양배출관련 CFD 모사연구에 도움을 준 울산대학교 천이난류유동연구실, 배출수에 대한 수질분석에 참여하여준 한국조선해양기자재연구소(KOMERI, Korea Marine Equipment Research Institute) 경남지부 그리고 생성물 해양배출관련 해양독성평가를 진행하여 준 해양생태기술연구소(MEI, Marine Eco-Technology Institute) 관계자 여러분께 감사드립니다.

참고문헌

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