Economic and Environmental Performance of an Integrated CO2 Refinery

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Title: Economic and Environmental Performance of an Integrated CO2 Refinery
Authors: Ioannou, Iasonas | Javaloyes-Antón, Juan | Caballero, José A. | Guillén Gosálbez, Gonzalo
Research Group/s: Computer Optimization of Chemical Engineering Processes and Technologies (CONCEPT)
Center, Department or Service: Universidad de Alicante. Departamento de Ingeniería Química | Universidad de Alicante. Departamento de Física, Ingeniería de Sistemas y Teoría de la Señal | Universidad de Alicante. Instituto Universitario de Ingeniería de los Procesos Químicos
Keywords: Carbon capture and utilization (CCU) | Refinery | Allam cycle | CO2 hydrogenation | Residual gas utilization (RGU) | Methanol economy
Issue Date: 26-Jan-2023
Publisher: American Chemical Society
Citation: ACS Sustainable Chemistry & Engineering. 2023, 11(5): 1949-1961.
Abstract: The consequences of global warming call for a shift to circular manufacturing practices. In this context, carbon capture and utilization (CCU) has become a promising alternative toward a low-emitting chemical sector. This study addresses for the first time the design of an integrated CO2 refinery and compares it against the business-as-usual (BAU) counterpart. The refinery, which utilizes atmospheric CO2, comprises three synthesis steps and coproduces liquefied petroleum gas, olefins, aromatics, and methanol using technologies that were so far studied decoupled from each other, hence omitting their potential synergies. Our integrated assessment also considers two residual gas utilization (RGU) designs to enhance the refinery’s efficiency. Our analysis shows that a centralized cluster with an Allam cycle for RGU can drastically reduce the global warming impact relative to the BAU (by ≈135%) while simultaneously improving impacts on human health, ecosystems, and resources, thereby avoiding burden-shifting toward human health previously observed in some CCU routes. These benefits emerge from (i) recycling CO2 from the cycle, amounting to 11.2% of the total feedstock, thus requiring less capture capacity, and (ii) reducing the electricity use while increasing heating as a trade-off. The performance of the integrated refinery depends on the national grid, while its high cost relative to the BAU is due to the use of expensive electrolytic H2 and atmospheric CO2 feedstock. Overall, our work highlights the importance of integrating CCU technologies within chemical clusters to improve their economic and environmental performance further.
Sponsor: I.I. and G.G.-G. acknowledge financial support as part of NCCR Catalysis (grant number 180544), a National Centre of Competence in Research funded by the Swiss National Science Foundation. J.J.-A. and J.A.C. acknowledge financial support from the “Generalitat Valenciana” under project PROMETEO 2020/064.
ISSN: 2168-0485
DOI: 10.1021/acssuschemeng.2c06724
Language: eng
Type: info:eu-repo/semantics/article
Rights: © 2023 The Authors. Published by American Chemical Society. Creative Commons Attribution 4.0 International License (CC BY 4.0)
Peer Review: si
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Appears in Collections:INV - CONCEPT - Artículos de Revistas

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