LAPSE:2020.0305
Preprint
LAPSE:2020.0305
Comprehensive Environmental Impact Assessment of a Combined Petroleum Coke and Natural Gas to Fischer-Tropsch Diesel Process
Thomas A. Adams II
March 13, 2020
In this study, a well-to-wheels life cycle assessment was conducted to determine the environmental impacts from disposing of petroleum coke by converting it into liquid fuel. Specifically, three processes for converting petroleum coke and natural gas to Fischer Tropsch diesel were investigated, both with and without carbon capture and sequestration (CCS). Impact categories were calculated using the EPA’s TRACI 2.1 US-Canada 2008 midpoint method in SimaPro software. In addition, the impact of grid emissions on the overall process was assessed using two representative Canadian locations with high (Alberta) and low (Ontario) grid emissions. The results of each impact category were compared among the designs and against conventional petroleum and oil-sands derived diesel. Key findings showed that the proposed designs when operated using CCS in the low-emissions-grid location had lower life cycle GHG emissions than conventional petroleum and oil-sands derived diesel. Nevertheless, the various tradeoffs between processes indicated that there was no clearly superior design among the candidates. However, the design which uses a natural gas reformer that is integrated directly into the radiant syngas cooler of a petcoke gasification unit has the lowest cost of CO2 avoided, and so is likely the best choice for environmental purposes.
Subject
Suggested Citation
Adams TA II. Comprehensive Environmental Impact Assessment of a Combined Petroleum Coke and Natural Gas to Fischer-Tropsch Diesel Process. (2020). LAPSE:2020.0305
Author Affiliations
Adams TA II: McMaster University
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Journal Name
International Journal of Greenhouse Gas Control
Volume
96C
Year
2020
Publication Date
2020-03-13
Published Version
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Mar 13, 2020
License
CC BY-NC-ND 4.0
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Mar 13, 2020
 
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iokeke