Hydrogen Value Chain
- By-Product Hydrogen
As a by-product hydrogen that comes from petroleum and chemical plants, its use was limited because of difficulties in storage and distribution. Until now, it has been reproduced as liquefied hydrogen, which has low added value.
- Extraction of Clean Hydrogen
When high-temperature steam (H2O) is combined with methane (CH4), carbon dioxide (CO2), the main component of natural gas, is generated in this process and can be captured using carbon capture utilization storage technology to produce clean, eco-friendly hydrogen without air pollution.
- Production of Hydrogen through Water Electrolysis
Produced through water electrolysis using electricity from renewable energy, it does not generate carbon dioxide at all. Hydrogen created using renewable energy is called green hydrogen.
- Liquefaction Plant
Gaseous hydrogen is bulky, making it difficult to transport. The liquefaction plant is a facility that liquefies gaseous hydrogen at -253°. Liquid hydrogen has a volume of 1/800 less than gaseous hydrogen.
It transports gaseous hydrogen to the destination or utilization site. When transporting a small amount to a short distance, gaseous hydrogen is more efficient.
- Tank Lorry
Liquid hydrogen can be transported using a tank lorry because its volume is considerably lower than that of gas hydrogen. A tank lorry is a reasonable choice for long-distance transportation.
- Application of Hydrogen
Hydrogen is used not only for hydrogen vehicles but also as fuel for hydrogen fuel cell power plants. In addition, it can be used as fuel for heavy and bulky transportation drones, aircrafts, ships, and trains as it generates strong power.
Project Phase 1 (2023 onward)
SK E&S plans to supply 30,000 t of liquefied hydrogen to the Seoul Metropolitan Area starting 2023 by liquefying additional by-product hydrogen from SK Incheon Petrochem.
When gaseous hydrogen is processed into liquid hydrogen through a liquefaction plant, storage and transportation of hydrogen become much more convenient and efficient.
A liquefaction plant is planned to be built on the 42,975 m2 site at SK Incheon Petrochem. Because of its proximity to the Seoul Metropolitan Area, transportation is expected to be easier compared to hydrogen produced in Changwon and Ulsan, Gyeongsangnam-do.
Project Phase 2 (2025 onward)
Starting 2025, SK E&S plans to produce 250,000 t of clean hydrogen from natural gas per year. Clean hydrogen refers to hydrogen that does not generate carbon dioxide during the production process, or the generated carbon dioxide, if any, is removed through the capture and storage process.
The clean hydrogen plant is planned to be built within the vicinity of Boryeong LNG Terminal, which was jointly established by SK E&S and GS.
Natural gas, a raw material for clean hydrogen, is supplied using the LNG (liquefied natural gas) value chain infrastructure secured by SK E&S. In particular, SK E&S is the largest private LNG operator in Korea that directly imports over 3 million t of LNG per year.
In the long term, SK E&S will also actively promote green hydrogen production using renewable energy sources, such as solar and wind power, to complete an eco-friendly hydrogen value chain that does not emit carbon dioxide at all.