K. Remananda Rao

CHEMICAL EQUIPMENT - FLUIDIZED BEDS

FLOW OF FLUIDS - Two Phase

EFFECT OF SOLIDS

FLUIDIZATION VELOCITY

GAS-SOLID-LIQUID CONTACTOR

JET LOOP REACTOR

Chemical reactors

IIT Madras is a public technical and research university located in Chennai, Tamil Nadu. Founded in 1959, it is recognised as an Institute of National Importance.

IIT Madras has been ranked as the top engineering institute in India for four years in a row by the National Institutional Ranking Framework of the MHRD

It currently offers undergraduate, postgraduate and research degrees across 16 disciplines in Engineering, Sciences, Humanities and Management. About 596 faculty belonging to science and engineering departments and centres of the Institute are engaged in teaching, research and industrial consultancy.

IIT Madras

Hydrodynamic characteristics of reversed flow jet loop reactor as a gas—liquid—solid contactor

Chemical Engineering Science

Experiments were conducted using glass beads and low-density particles such as polyurethane and polystyrene which are comparable to bioparticles found in biological applications to evaluate the overall volumetric mass transfer coefficient (KLa) in a modified reversed flow jet loop bioreactor having the liquid outlet at the top section of the reactor. The influence of the gas and liquid flow rates, draft tube to reactor diameter ratio, solids loading and physical properties of solids on KLa were studied. The KLa was found to increase with the increased gas and liquid flow rates. The KLa values were found to be higher in the bubbly flow region i.e., at the lower range of energy dissipation rates. The optimum draft tube to reactor diameter ratio and solids loading with respect to maximum KLa were found to be 0.4 and 0.9×10-3 m3 (e{open}s=0.025) respectively. Dimensionless correlations were presented to predict the experimental values in terms of operational and geometrical variables. © 1995 Springer-Verlag.

Bioprocess Engineering

Overall volumetric mass transfer coefficient in a modified reversed flow jet loop bioreactor with low density particles

Enhancement of gas-liquid mass transfer in a modified reversed flow jet loop reactor with three-phase system

Effect of low density particles on the apparent liquid circulation velocity and overall gas holdup was studied in a modified reversed flow jet loop bioreactor. Experiments were conducted using polyurethane beads, polystyrene particles which are comparable to bioparticles found in biological applications and glass beads. Influence of gas and liquid flow rates, draft tube to reactor diameter ratio and solids loading on these hydrodynamic properties were studied. The liquid circulation velocity was found to increase with an increase in liquid flow rate but decrease with an increase in gas flow rate or solids loading. The overall gas holdup increased with an increase in gas or liquid flow rate but decreased with an increase in solids loading. The range of optimum draft tube to reactor diameter ratio was found to be 04-0.5. The results obtained with low density particles were comparatively better than those with glass beads. Correlations were proposed to evaluate liquid circulation velocity and overall gas holdup in terms of operational and geometrical variables. © 1994 Springer-Verlag.

Liquid circulation velocity and overall gas holdup in a modified jet loop bioreactor with low density particles

Hydrodynamic characteristics of reversed flow jet loop reactor as a gas-liquid-solid contactor

Journal	Chemical Engineering Science
ISSN	00092509
Open Access	No