Chemical Reaction Effect upon Gas–Liquid Interfacial Area in a Bubble Column Reactor

Abstract

This work analyses the influence of different experimental conditions over important hydrodynamic parameters of a bubble column reactor, such as bubble size distribution, gas hold-up and the gas-liquid interfacial area. The influence of gas flow-rate (18-40 L h -1 ) and reagent concentration (0-0.5 mol L -1 ) in the liquid phase upon these hydrodynamic parameters have been studied. The influence of experiment time must also be taken into account due to non-steady-state regime. Under these considerations, the chemical absorption rate changes throughout time, and it produces important changes upon the global absorption process, due to modifications in the gas-liquid interfacial area. The presence of a fast reaction in the liquid bulk has the highest influence upon interfacial area.

Cultivation of Chlorella vulgaris in Column Photobioreactor for Biomass Production and Lipid Accumulation

“…It is the volume ratio of the gas phase in the distribution between gas and liquid phases or the residence time of the gas in the liquid. Given that aeration can occur in the riser, gas hold-up in the riser should be higher than the downcomer (without aeration) to create a liquid circulation pattern (Blanco et al, 2013;Molina et al, 2001;Wang et al, 2012). The design volume of the reactor and the gas-liquid contact area for mass transfer also depend on the gas hold-up, which is related to the bubble size and gas-liquid interfacial area for mass transfer.…”

“…The design volume of the reactor and the gas-liquid contact area for mass transfer also depend on the gas hold-up, which is related to the bubble size and gas-liquid interfacial area for mass transfer. Thus, the gas-liquid interfacial area is based on the liquid volume or gas-liquid dispersion volume (Blanco et al, 2013;Bitog et al, 2011;Posten, 2009). Mixing time is defined as the time for a point addition to the vessel to distribute uniformly and is related to gas hold-up (Fu et al, 2003;Posten, 2009).…”

CO2 capture by pyrrolidine: Reaction mechanism and mass transfer

“…This behavior is due to an increase in the value of gas-liquid interfacial area. 30 This enhancement in interfacial area increases carbon dioxide mass transfer that reacts with pyrrolidine in the liquid phase. This behavior shows that mass transfer is the ratedetermining step in this process.…”