TY - JOUR
T1 - Design and economic analysis of natural gas hydrate regasification process combined with LNG receiving terminal
AU - Shin, Seolin
AU - Lee, Yongseok
AU - Song, Kiwook
AU - Na, Jonnggeol
AU - Park, Seongho
AU - Lee, Yeongbeom
AU - Lee, Chul Jin
AU - Han, Chonghun
N1 - Publisher Copyright:
© 2016
PY - 2016/8/1
Y1 - 2016/8/1
N2 - 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.
AB - 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.
KW - LNG
KW - LNG terminal
KW - Natural gas chain
KW - Natural gas hydrate (NGH)
KW - Regasification
UR - http://www.scopus.com/inward/record.url?scp=84976417458&partnerID=8YFLogxK
U2 - 10.1016/j.cherd.2016.06.003
DO - 10.1016/j.cherd.2016.06.003
M3 - Article
AN - SCOPUS:84976417458
SN - 0263-8762
VL - 112
SP - 64
EP - 77
JO - Chemical Engineering Research and Design
JF - Chemical Engineering Research and Design
ER -