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Advisor(s)
Abstract(s)
Hierarchically structured 3D-printed porous carbons monoliths were investigated for their applicability in adsorptive n/iso-paraffin separation. Three materials of the same macroscopic shape were employed, which varied in the micro- and mesoporosity by altering the final CO2 activation step: non-activated and activated at 1133 K for 6 and 12 h, respectively. Chromatographic breakthrough experiments were conducted for pentane and hexane isomer mixtures at industrially relevant separation conditions. Results demonstrated that the initial porosity for the non-activated monolith enables the complete separation of linear paraffins from their branched isomers (slightly adsorbed) via a near molecular sieving effect. The Langmuir isotherm conveniently fitted the adsorption equilibrium data, and a dynamic mathematical model suitably predicted the breakthrough curves. Regarding the CO2 activated monoliths, both showed adsorption towards all alkanes with practically no selectivity between them.
Description
Keywords
RON improvement of gasoline Pentane and hexane isomers separation by adsorption 3D-printed carbon monoliths
Pedagogical Context
Citation
Henrique, Adriano; Zafanelli, Lucas F.A.S.; Aly, Ezzeldin; Steldinger, Hendryk; Gläsel, Jan; Rodrigues, Alírio; Etzold, Bastian J.M.; Silva, José A.C. (2023). Separation of n/iso-paraffins in a hierarchically structured 3D-printed porous carbon monolith. In 14th International Chemical and Biological Engineering Conference (CHEMPOR 2023): book of abstracts. Bragança. ISBN 978-972-745-327-6
Publisher
Instituto Politécnico de Bragança