Abstract
In the current study, conventional resources-based ammonia generation routes are comparatively studied through a comprehensive life cycle assessment. The selected ammonia generation options range from mostly used steam methane reforming to partial oxidation of heavy oil. The chosen ammonia synthesis process is the most common commercially available Haber-Bosch process. The essential energy input for the methods are used from various conventional resources such as coal, nuclear, natural gas and heavy oil. Using the life cycle assessment methodology, the environmental impacts of selected methods are identified and quantified from cradle to gate. The life cycle assessment outcomes of the conventional resources based ammonia production routes show that nuclear electrolysis-based ammonia generation method yields the lowest global warming and climate change impacts while the coal-based electrolysis options bring higher environmental problems. The calculated greenhouse gas emission from nuclear-based electrolysis is 0.48 kg CO2 equivalent while it is 13.6 kg CO2 per kg of ammonia for coal-based electrolysis method.
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Abbreviations
- BWR:
-
boiling water reactor
- CCS :
-
carbon capture storage
- CFBG:
-
circulating fluidized bed gasifier
- CNG:
-
compressed natural gas
- DG:
-
downdraft gasifier
- GHG:
-
greenhouse gas
- HHV :
-
higher heating value
- IPCC:
-
intergovernmental panel on climate change
- LCA:
-
life cycle analysis
- LPG:
-
liquefied petroleum gas
- PEM:
-
proton exchange membrane
- PV :
-
photovoltaic
- PWR:
-
pressurized water reactor
- SD:
-
standard deviation
- SMR:
-
steam methane reforming
- USES:
-
The Uniform System for the Evaluation of Substances
- UCG:
-
underground coal gasification
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We acknowledge the support provided by the Mitacs (The Mathematics of Information Technology and Complex Systems) Accelerate.
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Bicer, Y., Dincer, I., Vezina, G. et al. Impact Assessment and Environmental Evaluation of Various Ammonia Production Processes. Environmental Management 59, 842–855 (2017). https://doi.org/10.1007/s00267-017-0831-6
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DOI: https://doi.org/10.1007/s00267-017-0831-6