CO₂ capture in oil refineries: Assessment of the capture avoidance costs associated with different heat supply options in a future energy market
2013
Johansson, Daniella | Franck, Per-Åke | Berntsson, Thore
The application of post-combustion CO₂ capture represents an alternative strategy to reduce significantly CO₂ emissions from the oil refining industry. Previous studies have shown that the highest costs are related to the provision and use of energy and that these costs could be reduced by utilising excess heat. In the present study, we investigated whether this principle could be applied to the oil refining industry. Four heat supply alternatives were evaluated: Natural Gas Combined Cycle; Natural Gas Boiler; Biomass Boiler; and Excess Heat. These alternatives were evaluated using future energy market scenarios and two levels of heat demand. The Natural Gas Combined Cycle alternative generated high levels of electricity (with CO₂ capture), thereby producing the greatest reduction in global CO₂ emissions. However, the avoided CO₂ emissions from onsite the refinery were highest when excess heat or a biomass boiler was used. In the present study, the capture avoidance cost ranged from 40 to 263€/tCO₂ avoided (excluding transportation and storage costs), depending on the heat supply alternative used and the heat demand. Moreover, with a high cost for CO₂, CO₂ capture using excess heat could be a cost-effective alternative to reduce CO₂ emissions for oil refineries.
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