Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Simulation of Organic Liquid Products Deoxygenation by Multistage Countercurrent Absorber/Stripping Using CO2 as Solvent with Aspen-HYSYS: Process Modeling and Simulation

Version 1 : Received: 30 December 2021 / Approved: 4 January 2022 / Online: 4 January 2022 (14:54:24 CET)

How to cite: Jr., M.R.D.S.; Costa, E.C.; Ferreira, C.C.; Bernar, L.P.; da Silva, M.P.; Mâncio, A.D.A.; da Mota, S.A.P.; de Castro, D.A.R.; Jr., S.D.; Borges, L.E.P.; Araújo, M.E.; Machado, N.T.; Jr, S.D. Simulation of Organic Liquid Products Deoxygenation by Multistage Countercurrent Absorber/Stripping Using CO2 as Solvent with Aspen-HYSYS: Process Modeling and Simulation. Preprints 2022, 2022010009 (doi: 10.20944/preprints202201.0009.v1). Jr., M.R.D.S.; Costa, E.C.; Ferreira, C.C.; Bernar, L.P.; da Silva, M.P.; Mâncio, A.D.A.; da Mota, S.A.P.; de Castro, D.A.R.; Jr., S.D.; Borges, L.E.P.; Araújo, M.E.; Machado, N.T.; Jr, S.D. Simulation of Organic Liquid Products Deoxygenation by Multistage Countercurrent Absorber/Stripping Using CO2 as Solvent with Aspen-HYSYS: Process Modeling and Simulation. Preprints 2022, 2022010009 (doi: 10.20944/preprints202201.0009.v1).

Abstract

In this work, the deoxygenation of organic liquid products (OLP) obtained by thermal catalytic cracking of palm oil at 450 °C, 1.0 atmosphere, with 10% (wt.) Na2CO3 as catalyst, in multistage countercurrent absorber columns using supercritical carbon dioxide (SC-CO2) as solvent, with Aspen-HYSYS process simulator was systematically investigated. In a previous study, the thermodynamic data basis and EOS modeling necessary to simulate the deoxygenation of OLP has been presented [Molecules 2021, 26, 4382. https://doi.org/10.3390/molecules26144382]. This work address a new flowsheet, consisting of 03 absorber columns, 10 expansions valves, 10 flash drums, 08 heat exchanges, 01 pressure pump, and 02 make-up of CO2, aiming to improve the deacidification of OLP. The simulation was performed at 333 K, 140 bar, and (S/F) = 17; 350 K, 140 bar, and (S/F) = 38; 333 K, 140 bar, and (S/F) = 25. The simulation shows that 81.49% of OLP could be recovered and the concentrations of hydrocarbons in the extracts of absorber-01 and absorber-02 were 96.95 and 92.78% (wt.) in solvent-free basis, while the bottom stream of absorber-03 was enriched in oxygenates compounds with concentrations up to 32.66% (wt.) in solvent-free basis, showing that organic liquid products (OLP) was deacidified and SC-CO2 was able to deacidify OLP and to obtain fractions with lower olefins content. The best deacidifying conditions was obtained at 333 K, 140 bar, and (S/F) = 17.

Keywords

OLP; Deoxygenation; Absorber columns; Process flowsheet; Process Simulation; Aspen-HYSYS.

Subject

ENGINEERING, Energy & Fuel Technology

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