A liquefied energy chain for transport and utilization of natural gas for power production with CO2 capture and storage - Part 4: Sensitivity analysis of transport pressures and benchmarking with conventional technology for gas transport

Audun Aspelund and Truls Gundersen

Applied Energy, 2009, vol. 86, issue 6, 815-825

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 section, natural gas (NG) is liquefied to LNG by liquid carbon dioxide (LCO2) and liquid inert nitrogen (LIN), which are used as cold carriers. In the onshore process, the cryogenic exergy in the LNG is utilized to cool and liquefy the cold carriers, LCO2 and LIN. The transport pressures for LNG, LIN and LCO2 will influence the thermodynamic efficiency as well as the ship utilization; hence sensitivity analyses are performed, showing that the ship utilization for the payload will vary between 58% and 80%, and the transport chain exergy efficiency between 48% and 52%. A thermodynamically optimized process requires 319Â kWh/tonne LNG. The NG lost due to power generation needed to operate the LEC processes is roughly one third of the requirement in a conventional transport chain for stranded NG gas with CO2 capture and sequestration (CCS).

Keywords: Liquefied natural gas; LNG Liquid inert nitrogen; LIN Liquid carbon dioxide; LCO2 Integration Exergy Carbon dioxide; CO2 Air separation unit; ASU Oxyfuel Carbon capture and sequestration; CCS Enhanced oil recovery; EOR Sensitivity analysis Benchmarking (search for similar items in EconPapers)
Date: 2009
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Citations: View citations in EconPapers (40)

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