A liquefied energy chain for transport and utilization of natural gas for power production with CO2 capture and storage - Part 2: The offshore and the onshore processes

Audun Aspelund and Truls Gundersen

Applied Energy, 2009, vol. 86, issue 6, 793-804

Abstract: A novel energy and cost effective transport chain for stranded natural gas utilized for power production with CO2 capture and storage is developed. It includes an offshore section, a combined gas carrier, and an integrated receiving terminal. In the offshore process, natural gas (NG) is liquefied to LNG by liquid carbon dioxide (LCO2) and liquid inert nitrogen (LIN), which are used as cold carriers. The offshore process is self-supported with power, hot and cold utilities and can operate with little rotating equipment and without flammable refrigerants. In the onshore process, the cryogenic exergy in LNG is used to cool and liquefy the cold carriers, which reduces the power requirement to 319Â kWh/tonne LNG. Pinch and exergy analyses are used to determine thermodynamically optimized offshore and onshore processes with exergy efficiencies of 87% and 71%, respectively. There are very low emissions from the processes. The estimated specific costs for the offshore and onshore process are 8.0 and 14.6 EUR per tonne LNG, respectively, excluding energy costs. With an electricity price of 100 EUR per MWh, the specific cost of energy in the onshore process is 31.9 EUR per tonne LNG.

Keywords: Liquefied natural gas; LNG Liquid inert nitrogen; LIN Liquid carbon dioxide; LCO2 Integration Exergy Carbon capture and sequestration; CCS Enhanced oil recovery; EOR CO2 capture and storage (search for similar items in EconPapers)
Date: 2009
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (38)

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