Gas Hold-Up in Vessel with Dual Impellers and Different Baffles

Gas Hold-Up in a Reactor with Dual System of Impellers*

Results of experimental studies of gas hold-up in a liquid stirred mechanically in a reactor, which was equipped with double stirrers on a common shaft, are presented. Coalescing and noncoalescing gas—liquid systems were tested. The measurements were carried out for aqueous solutions of glucose and glucose sirup, as well as for different configurations of dual high-speed impellers. Stirred tank...

investigation of gas hold up and power consumption in a stirred tank bioreactor using single and dual impeller configurations

a laboratory stirred tank bioreactor with six single and dual-impeller configurations was tested to obtain the optimum operating conditions for future biological processes. six impeller combinations consisting of three basic impeller types, namely rushton turbine (rt), pitched 4blade (p4b) and pitched 2blade (p2b) downward flow were investigated in 1.77 l bioreactor working volume. power consum...

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

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.

Different Rules of Legal-cost Allocation and Patent Hold-up

We study how different rules for allocating litigation costs impact on royalty negotiation when a non-practicing patent holder asserts its patent against a product developer. A theoretical framework is proposed which distinguishes between three legal cost allocation systems: the American system, where each party bears its own costs, the British system, where the loser incurs all costs, and the ...