Design and economic analysis of natural gas hydrate regasification process combined with LNG receiving terminal

Seolin Shin, Yongseok Lee, Kiwook Song, Jonnggeol Na, Seongho Park, Yeongbeom Lee, Chul Jin Lee, Chonghun Han

Research output: Contribution to journalArticlepeer-review

6 Scopus citations


In this study, natural gas hydrate (NGH) regasification process combined with liquefied natural gas (LNG) receiving terminal is designed. Since NGH contains excess water, the process needs a dehydration step to avoid reproduction of hydrate in the pipelines. As a method for dehydrating NGH, the enhanced dew point shift is chosen, and the last water specification is achieved by mixing with a LNG stream, which contains negligible water. To cool down the compressed NGH stream, the cryogenic energy of LNG receiving terminal is used. After designing the NGH regasification process, the economic analysis is carried out according to the shipping distance, type of refrigerant, capacity of carrier, and mixing ratio of NGH over LNG. Then, comparison between the conventional LNG chain to the proposed chain that utilizes both LNG and NGH is made. When the quantity of regasified natural gas is fixed at 3.7 million metric tons per year (MTPA), the proposed chain is able to reduce the total chain cost by up to 10.6% compared to the conventional LNG chain in the case of natural gas (NG) delivery to South Korea. Lastly, the risk on investment with respect to the NG liquefaction cost is conducted. According to this, as the shipping distance increases, the risk of the proposed chain decreases.

Original languageEnglish
Pages (from-to)64-77
Number of pages14
JournalChemical Engineering Research and Design
StatePublished - 1 Aug 2016

Bibliographical note

Funding Information:
This research was supported by the Brain Korea 21 Plus Program in 2016, by a grant (14IFIP-B085984-02) from the Smart Civil Infrastructure Research Program funded by the Ministry of Land, Infrastructure and Transport (MOLIT) of Korea Government and Korea Agency for Infrastructure Technology Advancement (KAIA), by Korea Ministry of Environment (MOE) as “the Chemical Accident Prevention Technology Development Project” (No. 2015001950003), by the Energy Efficiency & Resources Core Technology Program of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) granted financial resource from the Ministry of Trade, Industry & Energy, Republic of Korea (No. 20132010500050).

Publisher Copyright:
© 2016


  • LNG
  • LNG terminal
  • Natural gas chain
  • Natural gas hydrate (NGH)
  • Regasification


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