CHISA 2026

2026 · Conference

28th International Congress of Chemical and Process Engineering

Prague, 23–28 August 2026. Four contributions from the project — three oral presentations and a poster, which won the congress best poster award.

Poster · Best poster award

Influence of bubble release mechanism on the rise velocity and deformation of single bubbles in aqueous ionic liquid solutions

D. E. Aissaoui, A. Ferrario, N. Varallo, H. Hessenkemper, G. Besagni

CHISA 2026, Prague. Winner of the congress best poster award.

How a bubble is released into the liquid — the injector geometry and the detachment mechanism — leaves a measurable trace on its subsequent rise. The work compares release mechanisms in aqueous ionic-liquid solutions and quantifies their effect on rise velocity and on the deformation of the bubble, within the bubble-scale work package and in collaboration with the Helmholtz-Zentrum Dresden-Rossendorf.

Oral presentation

A methodology for the selection of ionic liquids for CO₂ absorption based on thermodynamic and kinetic properties

A. Arici, G. Besagni

CHISA 2026, Prague — CO₂ capture session.

The solvent-screening step of the project: a methodology that ranks candidate ionic liquids for CO₂ absorption on both thermodynamic and kinetic grounds, rather than on solubility alone. Its output is the shortlist of solvents that feeds the design of the AURIGA absorber and the two experimental campaigns.

Oral presentation

Numerical investigation of bubble column with ionic liquids for CO₂ absorption

V. Regert, N. Varallo, G. Besagni

CHISA 2026, Prague — CO₂ capture session.

A computational study of gas–liquid flow and CO₂ mass transfer in bubble columns operated with ionic liquids, examining how the strongly different viscosity and surface tension of these solvents reshape the flow field and the interfacial transfer with respect to air–water.

Oral presentation

Experimental investigation of flow regime transitions in a rectangular bubble column using bed expansion and MRI-based gas holdup measurements

D. E. Aissaoui, A. Ferrario, N. Varallo, H. S. Rennebaum, A. Penn, G. Besagni

CHISA 2026, Prague — fluid and granular flows session. Work carried out with the Hamburg University of Technology.

Two independent routes to the gas holdup in a rectangular bubble column — bed expansion and magnetic resonance imaging — are used together to locate the flow regime transitions. The MRI measurement resolves the holdup spatially, so the transition points obtained from the global bed expansion can be cross-checked against the internal structure of the flow.

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