"바닷물로 도시가스를 만든다고?" 서울대 세계 최초 개발, 사우디·중동 LNG 42조 끝내버린 한국 역대급 '이 기술

South Korea ranks among the lowest in the world for energy independence. It imports 100% of its gas. It is a nation that used to pour 42 trillion won annually solely into purchasing gas. Seven out of ten gas we use depend on just four countries, and the system was structured so that if those valves were shut off, everything would come to a complete halt. However, in April 2026, a research team from Seoul National University shook up that system. They successfully extracted city gas by injecting natural seawater that had never been purified. And they did it for the first time in the world. Gas from seawater? You might think it is alchemy. But we have examined, without exaggeration, why this is more frightening than the booming 'hydrogen,' how a country that used to buy gas can be transformed into a country that sells it— and whether we are truly prepared to protect this technology, which may sustain us for the next 100 years. ――――――――――――――――― 📊 Key Figures · South Korea’s energy import dependency is approximately 93%; LNG production is zero, entirely imported (World’s 3rd largest importer) · 2024 LNG imports: approximately 46.33 million tons / approximately $29.2 billion (approx. 42 trillion KRW) · Approximately 70% of imports concentrated in the top 4 countries (Australia 24.6% · Qatar 19.2% · Malaysia 13.2% · US 12.2%) · During the 2022 Russia-Ukraine war, import value of the three major energy sources surged by approximately 64% compared to the previous year · Seoul National University Seawater Methane: Direct use of natural seawater (World’s first) / Faraday efficiency 65.4% / Total energy recovery rate 90%+ / Damage-free 24-hour continuous operation (Demonstration off the coast of Changwon, Gyeongnam) · Methane is compared to existing city gas Directly compatible with pipelines and LNG terminals (Hydrogen requires dedicated infrastructure due to hydrogen embrittlement) · Korea's EEZ is approximately 440,000 km² (about 4.5 times the land area), and it holds about 70% of the global market share for LNG carriers. · Overseas competition (Japan): Demonstration of synthetic methane at Kitakyushu LNG Terminal (target of 12.5 Nm³/h), target to replace 1% of the supply chain by 2030. · Remaining challenges: Offshore wind power target of 12 GW by 2030 and generation cost of less than 250 KRW per kWh / Economic feasibility of synthetic fuel (European e-fuel exceeds $50/MMBtu). ――――――――――――――――― 📎 References / Sources · Seoul National University Seawater Methane Technology (Professor Park Sang-wook & Han Jung-woo's team): Seoul National University School of Mechanical Engineering (me.snu.ac.kr), Paper in Applied Catalysis B: Environment and Energy (Scheduled for publication in June 2026) · LNG Import Volume, Import Value, Share of Importing Countries, and Dependence: Statistics from the Korea Customs Service and Korea Gas Corporation (2024) · Global Market Share of LNG Carriers: Shipbuilding Industry Order Statistics · Japan’s Synthetic Methane (e-Methane) Demonstration: Japan Gas Association / IEA (2024) · Offshore Wind Power Deployment and Generation Cost Targets: Ministry of Climate, Energy and Environment, etc. (2025) · Economic Outlook for Synthetic Fuels: Wood Mackenzie ※ This technology is currently in the laboratory demonstration phase, and a specific commercialization roadmap has not been officially confirmed. This video covers both the potential and challenges based on verified data. ――――――――――――――――― #BehindTheEconomy #SeoulNationalUniversity #SeawaterCityGas #LNG #EnergyIndependence This video was created using AI voice (TTS) and AI image/video tools. However, topic selection, data research, scriptwriting, and fact-checking are performed directly by the channel operator. This video is for informational purposes only, and the viewer is solely responsible for all investment and financial decisions and their consequences.