Abstract
To investigate the working performance of packing columns used in offshore floating production, CO2-absorption and hydrodynamic experiments were performed in a tilted laboratory-scale packing column. A six-degree-of-freedom motion parallel platform was adopted to mimic different tilted states (3°–12°). Using a CO2–NaOH system, the effects of the liquid flow rate (6–24m3/m2/h), NaOH concentration (0.5–2mol/L), gas flow rate (4.1–8.0m3/h) and CO2 molar fraction at the inlet (4.0–7.5%) on the CO2 absorption performance were investigated under normal pressure and temperature conditions. Liquid hold-up and pressure drop were measured using a water–air system. Three different types of packing were tested to compare their anti-tilt performance. The experimental results showed that tilt significantly reduced the mass transfer performance of Pall Ring 10mm; however, the reductions in the performance of Sulzer BX500 and BY500 were minor. Further, both liquid holdup and pressure drop of three packings were reduced by tilt.
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