Economically feasible decarbonization of the Haber-Bosch process through supercritical CO2 Allam cycle integration

Manhee Byun, Dongjun Lim, Boreum Lee, Ayeon Kim, In-Beum Lee, Boris Brigljević and Hankwon Lim

Applied Energy, 2022, vol. 307, issue C, No S0306261921014549

Abstract: The well-established Haber-Bosch (HB) process (industrial ammonia production) is a significant contributor to the world’s carbon emissions as it is a major consumer of natural gas as well as being energy-intensive in general. This work addresses the challenge of decarbonizing the HB process in a novel way as it, for the first time, presents a conceptual process integration with a supercritical CO2 Allam power cycle, therefore transforming gaseous CO2 emissions into a valuable side product in a form of liquid CO2. Detailed process design and flowsheet simulation using Aspen Plus ® was used as a basis for scale-up and techno-economic assessment of two cases (electrical grid dependent and independent). The results indicated that using this process design NH3 production reaches profitability at scales larger than 2 ton h−1 to 5.4 ton h−1 and at current global NH3 prices, the cost of manufacturing decrease, due to scale-up stabilizes at ∼ 30 ton h−1. Finally, this novel process integration achieves a significant reduction in gaseous CO2 emissions (compared to conventional HB process) of 68 % to 96 %, which indicates great potential for economically feasible green NH3.

Keywords: Ammonia; Haber-Bosch decarbonization; Supercritical CO2; Process integration; Process simulation; Techno-economic assessment (search for similar items in EconPapers)
Date: 2022
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Citations: View citations in EconPapers (2)

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DOI: 10.1016/j.apenergy.2021.118183

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