Chemical Engineering Journal
Al Moinee, A., Rownaghi, A. A., & Rezaei, F. (2024). Process Development and Techno-Economic Analysis for Combined and Separated CO2 Capture-Electrochemical Utilization. Chemical Engineering Journal, 499, 155909. https://doi.org/10.1016/j.cej.2024.155909
Abstract:
Combining CO2 capture and utilization into a single unit operation offers a feasible solution for converting a sustainable feedstock into marketable commodity chemicals, while reducing energy requirements from separated processes. In this research, we developed a process model and performed a techno-economic analysis (TEA) for point-source CO2 capture and electrochemical-based utilization in light olefins production under both separated and integrated scenarios. CO2 containing flue gas from a 500 MW power plant was utilized as a feed while CO2 utilization involved electrochemical reduction reactions to produce light olefins directly from CO2. A meticulous analysis was conducted, probing into the multifaceted impacts of various operating parameters, material properties, and downstream treatment units. Factors such as pressure, temperature, H2O/CO2 molar ratio, catalyst and adsorbent activities, deactivation rate, and heat integration were optimized to achieve 95 % CO2 recovery and > 90 % conversion, and > 85 % ethylene yield. Through a comprehensive TEA, our findings unveiled that the combined process utilizing bifunctional adsorbent/catalyst materials (BFMs) incurs costs of approximately $284/ton CO2, whereas the separated process reported expenses of ~$516/ton CO2. This study, pivotal in its contributions, evaluated economic feasibility of combined capture-conversion method based on BFMs for CO2 removal and subsequent utilization via a promising advanced process model for sustainable feedstocks conversion to commodity chemicals.
https://www.sciencedirect.com/science/article/pii/S138589472407400X?dgcid=author
https://www.sciencedirect.com/journal/chemical-engineering-journal
DOI (Digital Object Identifier):
https://doi.org/10.1016/j.cej.2024.155909
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