This paper investigates on a gas-to-liquids (GTL) plant with ATR syngas production and proposes a new process to use a gas turbine and waste heat recovery gas/steam streams preheater to replace the fired heater. The new process features cascade utilization of fuel gas energy, as fuel gas is firstly used in a gas turbine (GT) at very high temperature and then lower-temperature GT exhaust gas is further used for preheating. Large exergy loss of heat transfer in the fired heater is eliminated. The improved process has an equivalent power generation efficiency of 80% which is significantly higher than conventional technology. Economic analysis indicates 129.8 M$ revenue would be produced over the lifetime if the extra power from a 15,000 bbl/d GTL plant can be exported to the grid at the price of cost of electricity for a conventional natural gas fired combined cycle plant.
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July 2014
Research-Article
Cascade Utilization of Fuel Gas Energy in Gas-to-Liquids Plant
Rory Hynes
Mississauga, ON L5K2R7,
Rory Hynes
Hatch
,2800 Speakman Drive
,Mississauga, ON L5K2R7,
Canada
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Shimin Deng
Rory Hynes
Hatch
,2800 Speakman Drive
,Mississauga, ON L5K2R7,
Canada
Contributed by the Cycle Innovations Committee of ASME for publication in the JOURNAL OF ENGINEERING FOR GAS TURBINES AND POWER. Manuscript received December 8, 2013; final manuscript received January 23, 2014; published online February 20, 2014. Editor: David Wisler.
J. Eng. Gas Turbines Power. Jul 2014, 136(7): 071702 (5 pages)
Published Online: February 20, 2014
Article history
Received:
December 8, 2013
Revision Received:
January 23, 2014
Citation
Deng, S., and Hynes, R. (February 20, 2014). "Cascade Utilization of Fuel Gas Energy in Gas-to-Liquids Plant." ASME. J. Eng. Gas Turbines Power. July 2014; 136(7): 071702. https://doi.org/10.1115/1.4026599
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