Choice of the kinetic model significantly affects the outcome of techno-economic assessments of CO2-based methanol synthesis
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A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
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Date
2022-11-01
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Language
en
Pages
13
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Energy Conversion and Management, Volume 271
Abstract
Carbon dioxide hydrogenation to methanol is a cornerstone of the CO2 utilization toolkit, and its comparison to fossil-based methanol through techno-economic assessments (TEAs) has helped establish barriers to its commercial feasibility. TEAs are often performed in process simulation software that relies on kinetic models (KMs). The choice of KM could influence the outcome of the TEA, however, their effect has not been quantified earlier. This study quantifies this effect through TEAs performed using three different KMs in Aspen Plus™. Three KMs are selected for comparison: two of them are commonly used in TEAs while also a third, a recently published model, will be studied herein. The models are first validated in Aspen Plus™ and then compared in a series of sensitivity analyses in a one-pass reactor. Finally, a TEA study is conducted for a large-scale methanol plant to investigate the effects of the KM choice. It was found that the choice of the kinetic model significantly influences the results of TEAs as it can result in a 10% difference in the levelized cost of methanol. This can be mainly attributed to differences in one-pass yield. As CO2 utilization approaches economic viability, understanding such uncertainties will be crucial for successful project planning. Hence, these results suggest that extending a TEA's sensitivity analysis to cover the KM's contribution could increase confidence in the robustness of the TEA.Description
Funding Information: This work was supported by the Academy of Finland profiling funding 5 for Energy Storage (grant number 326346) and the Finnish Foundation for Technology Promotion. The research is part of the P2XEnable project (p2xenable.fi) and the authors would like to acknowledge Business Finland and the project partners for their financial support (grant number 8797/31/2019). Publisher Copyright: © 2022 The Authors
Keywords
Aspen Plus, Hydrogenation, Kinetic modeling, Methanol synthesis, Process modeling, Techno-economic assessment
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Citation
Nyári, J, Izbassarov, D, Toldy, Á I, Vuorinen, V & Santasalo-Aarnio, A 2022, ' Choice of the kinetic model significantly affects the outcome of techno-economic assessments of CO 2 -based methanol synthesis ', Energy Conversion and Management, vol. 271, 116200 . https://doi.org/10.1016/j.enconman.2022.116200