Process modelling and feasibility study of sorption-enhanced methanol synthesis
Nieminen, Harri; Maksimov, Pavel; Laari, Arto; Väisänen, Virpi; Vuokila, Ari; Huuhtanen, Mika; Koiranen, Tuomas (2022-07-16)
Nieminen, H., Maksimov, P., Laari, A., Väisänen, V., Vuokila, A., Huuhtanen, M., & Koiranen, T. (2022). Process modelling and feasibility study of sorption-enhanced methanol synthesis. Chemical Engineering and Processing - Process Intensification, 179, 109052. https://doi.org/10.1016/j.cep.2022.109052
© 2022 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY license.
https://creativecommons.org/licenses/by/4.0/
https://urn.fi/URN:NBN:fi-fe2022101261641
Tiivistelmä
Abstract
A sorption-enhanced process for hydrogenation of CO₂ to methanol was designed and investigated by mathematical modelling and techno-economic analysis. The modelling methodology combined dynamic modelling of the cyclic reactor operation with pseudo-steady state modelling of the overall process. With continuous adsorption of water in the sorption-enhanced process, highly pure methanol (>99%) was produced without downstream distillation. The dynamic reactor cycle was designed and optimized to maximize the methanol production rate. The cycle and the process were modelled in two reactor configurations: adiabatic and isothermal. Under the default cost assumptions for the raw materials (CO₂ 50 €/t, hydrogen 3000 €/t) the adiabatic configuration was found more competitive in terms of the overall methanol production cost, at 1085 €/t compared to 1255 €/t for the isothermal case. The cost estimate for the adiabatic case was found comparable to a reference process representing conventional CO₂ hydrogenation to methanol (1089 €/t). In addition to the methanol process, the developed modeling method has potential in the design of other sorption-enhanced processes.
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