Studies on gas hold-up in gas-liquid spouted vessel.

The Influence of Pressure on the Liquid Hold-up in a Cocurrent Gas-liquid Trickle-bed Reactor Operating at Low Gas Velocities

The influence of reactor pressure up to 6.0 MPa on the dynamic liquid hold-up in the trickle-flow regime with superficial gas velocities up to 5.2 cm/s has been investigated for water, ethanol and aqueous 40% ethyleneglycol, with nitrogen as the gas phase. Without gas flow, i.e. single-liquid trickle-flow operation, the reactor pressure has no influence on the dynamic liquid hold-up, which can ...

Gas Hold-up Characteristics of an External Loop Airlift Contactor

Conventional airlift contactor (UT-ALC) was modified to improve its performance. The modified system (CDT-ALC) was tested for gas hold-up characteristics. Hydrodynamic environment depends on gas hold-up. New system reported 50 % higher gas hold-up. Linear relation between superficial gas velocity and fractional gas hold-up were developed from experimental data for both the reactors.

Spouting Enhancement by Addition of Small Quantities of Liquid to Large-Particle Gas-Spouted Beds

Mechanical Engineering, Kochi National College of Technology, 200-1, Monobe, Nankoku-shi, Kochi, JAPAN, 783-8508 Fax: +81-88-864-5521, E-mail: [email protected] 1 Chemical and Biological Engineering, University of British Columbia, 2216 Main Mall, Vancouver, BC, CANADA, V6T1Z4, E-mail:[email protected] 2 Mechanical Engineering, Tokyo Metropolitan University, 1-1, Minami Osawa, Hachioji-sh...

Investigation of Gas Hold-up and Bubble Behavior in a Split-Cylinder Airlift Reactor: Pseudo-Plastic Non-Newtonian Fluids

Evaluation of interphase drag models for the determination of gas hold-up of an air-water system in a spouted bed using CFD

The hydrodynamics of a dispersed air-water system within a spouted column with a concentric draft tube and a conical base is simulated using CFD based on a two–fluid Euler–Euler (E-E) modeling framework and k-ε two-equation turbulence closures. The interaction between the dispersed gas phase and the continuous liquid phase is characterized by bubble–liquid interphase forces (drag, turbulent dis...