Bubble characterization and gas–liquid interfacial area in two phase gas–liquid system in bubble column at low Reynolds number and high temperature and pressure

Feng, Dan; Ferrasse, Jean‐Henry; Soric, Audrey; Boutin, Olivier

doi:10.1016/j.cherd.2019.02.001

Cited by 21 publications

(11 citation statements)

References 51 publications

(116 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Thus, the total influence of pool temperature on bubble size and gas holdup depends on the competitive effect. As reported by Pohorecki et al (2001) and Feng et al (2019), the water temperature has a slight influence on bubble size, gas holdup, and interfacial area.…”

Section: Influence Of Pool Temperature On Filtration Efficiencysupporting

confidence: 52%

Preliminary Experimental Investigation on the Filtration Performance of Submicron Insoluble Aerosol in a Bubble Column

Shi

Sun

et al. 2019

Front. Energy Res.

View full text Add to dashboard Cite

Pool scrubbing is a representative process for aerosol retention involved in severe LWR accidents and has proved to be a potential method for the removal of micron-sized aerosols. Bubble scrubbing, as the key component of pool scrubbing, has the advantages of a large gas-liquid contact area and long residence time. However, the filtration mechanism of submicron aerosol by bubble scrubbing is still not clear. Therefore, the goal of this research is to evaluate the filtration performance of submicron insoluble aerosol in a bubble column. Some preliminary experiments were carried out to investigate the influence of operational parameters on aerosol filtration efficiency, such as inlet aerosol concentration, gas flow rate and pool temperature. Mass method was used to analyze the aerosol filtration efficiency. The results show that the aerosol filtration efficiency is independent of inlet aerosol concentration when inlet aerosol concentration is in the range of 0.2-0.5 g/m 3. Besides the aerosol filtration, efficiency is influenced by the superficial gas velocity. With the increase of superficial gas velocity, homogeneous bubbling, transition and a heterogeneous bubbling regime will appear in turn. The aerosol filtration efficiency decreases in the transition regime due to the appearance of large bubbles but increases in the heterogeneous bubbling regime account for intense gas-liquid interaction. Moreover, the aerosol filtration efficiency significantly decreases with pool temperature because the evaporation rate at the gas-liquid interface will significantly increase as the boiling point is approached, which gives retroaction to aerosol filtration efficiency.

show abstract

Section: Influence Of Pool Temperature On Filtration Efficiencysupporting

confidence: 52%

Preliminary Experimental Investigation on the Filtration Performance of Submicron Insoluble Aerosol in a Bubble Column

Shi

Sun

et al. 2019

Front. Energy Res.

View full text Add to dashboard Cite

show abstract

“…Increasing P and T resulted in BSD shifting from larger-to-smaller diameter bubble. Moreover, BSD was not significant by the properties of the dispersed phase, but mainly affected by the properties of the continuous phase [12]. At low U g , the bubble characteristics largely influenced by the experimental system taken and not on the operating parameters [8].…”

Section: Introductionmentioning

confidence: 87%

Measurement of Bubble Size, Gas holdup and Interfacial Area in Bubble Columns using Image Processing Techniques

Agarwal¹,

Verma²

2019

IJITEE

View full text Add to dashboard Cite

Bubble sizes in bubble column affect transfer processes. Therefore, it’s important to calculate bubble size and interfacial area. Bubble size distribution (BSD) in a bubble column of rectangular cross section with dimensions 0.2m x 0.02m was measured using photographic method (400 fps) for air-water system. Gas holdup, Sauter-mean bubble diameter, aspect ratio and specific interfacial area were estimated from BSD. Effect of superficial gas velocity and static bed height on these parameters was investigated. The bubble size distribution exhibited mono-modal distribution showing the presence of non-uniform homogeneous bubbling regime. The frames of video were analysed using image processing steps to obtain major and minor axis of elliptical bubbles. Values of d32, , and ai were estimated from the data. The value of d32 increased with increasing Ug but is independent of Hs. The values of d32 were somewhat higher than the values reported by other investigators. The value of ai increases with increasing Ug and with decreasing Hs. Present values of compared well with the data reported in literature.

show abstract

“…[d] For H 2 O‐N 2 system at 10 MPa and 100 °C with liquid velocity (superficial), U L =2.2×10 −4 m/s and gas velocity (superficial), U G =1.4×10 −3 m/s having bubble mean Sauter diameter=1.1×10 −3 m, gas holdup=0.004 [33] …”

Section: Engineering Aspectsmentioning

confidence: 99%

Liquid Phase Oxidation of Hydrocarbons to High‐Value Chemicals in Microfluidic Reactors – Prospects and Challenges

Siddiquee

Hossain

Nazemifard

2022

The Chemical Record

View full text Add to dashboard Cite

Liquid phase oxidation (LPO) of hydrocarbon is an industrially important process to produce petrochemicals and pharmaceuticals. It follows a free radical path having initiation, propagation and termination. The initiation step is slow while the propagation and termination steps are fast. The main challenge of such process is to control product selectivity at an appreciable conversion level. With the advancement of microfluidic reactor technology, it is possible to control the free radical steps. The present contribution critically reviewed the reaction engineering aspects of LPO of hydrocarbon, the influence of microfluidic reactor design and operation on reaction mechanism, conversion and product selectivity. It also outlines the challenges associated with microfluidic reactor operation, and prospects to apply the understanding from microfluidic reactors in few sectors. The understanding from the free radical oxidation process can also be applied to any other free radical processes.

show abstract

Bubble characterization and gas–liquid interfacial area in two phase gas–liquid system in bubble column at low Reynolds number and high temperature and pressure

Cited by 21 publications

References 51 publications

Preliminary Experimental Investigation on the Filtration Performance of Submicron Insoluble Aerosol in a Bubble Column

Preliminary Experimental Investigation on the Filtration Performance of Submicron Insoluble Aerosol in a Bubble Column

Measurement of Bubble Size, Gas holdup and Interfacial Area in Bubble Columns using Image Processing Techniques

Liquid Phase Oxidation of Hydrocarbons to High‐Value Chemicals in Microfluidic Reactors – Prospects and Challenges

Contact Info

Product

Resources

About