نتایج جستجو برای: bubble column extraction

تعداد نتایج: 251922  

2016
Stoyan Nedeltchev

By means of the ultrafast X-ray tomography facility, data were obtained at different superficial gas velocities UG in a bubble column (0.1 m in ID) operated with an air-deionized water system at ambient conditions. Raw reconstructed images were treated by both the information entropy (IE) and the reconstruction entropy (RE) algorithms in order to identify the main transition velocities in a bub...

Ali Akbar Safekordi, Fatemeh Babazadeh Shareh Seied Hossein Ghiassi

The purpose of the present paper is to develop light beam method to measurement of interfacial area in a rectangular gas-liquid bubble column. Total interfacial area can be determined in bubble column filled by transparent liquid by light transmission method. According to pervious researches, the fraction of parallel light is function of interfacial area and optical path l...

پایان نامه :دانشگاه آزاد اسلامی - دانشگاه آزاد اسلامی واحد شاهرود - دانشکده فنی 1388

چکیده ندارد.

Journal: :iranian journal of oil and gas science and technology 0
amir hosein tahershamsi m.s. student, department of chemical engineering, iran university of science and technology (iust), tehran, iran ahad ghaemi assistant professor of department of chemical engineering, iran university of science and technology (iust), tehran, iran mansour shirvani associate professor of department of chemical engineering, iran university of science and technology (iust), tehran, iran

in this study, liquid-liquid extraction process in a kuhni extraction column was modeled and simulated. a non-equilibrium dynamic model was developed for modeling liquid-liquid extraction processes based on a rate-based model. the model equations are inclusive of partial and ordinary differential equations which were discretized in column height direction. the population balance model was used ...

Journal: :The Journal of Thoracic and Cardiovascular Surgery 1975

Journal: :KAGAKU KOGAKU RONBUNSHU 1981

Journal: :Bioresource technology 2012
Ambica Koushik Pegallapati Yalini Arudchelvam Nagamany Nirmalakhandan

An internally illuminated photobioreactor (IIPBR) design is proposed for energy-efficient biomass production. Theoretical rationale of the IIPBR design and its advantages over the traditional bubble column photobioreactors (PBRs) are presented, followed by experimental results from prototype scale cultivation of freshwater and marine algal strains in an 18L IIPBR. Based on theoretical considera...

2008
K. L. Wasewar V. K. Agarwal

The effect of design parameters on the flow pattern in a three-phase bubble column by means of Computational Fluid Dynamics (CFD) has been studied. The simulations were performed for air-water-glass beads in a bubble column of H = 0.6 m, D = 0.1 m and ds = 0.05 m to study the flow pattern. Eulerian–Eulerian three-phase simulations with kturbulence for liquid phase were carried out using the com...

1998
R. Krishna M. I. Urseanu J. M. van Baten J. Ellenberger

This paper develops a procedure for estimation of the rise velocity of a swarm of large gas bubbles in a bubble column operating in the churn-turbulent flow regime. The large bubble swarm velocity is estimated by introducing two correction factors into the classical Davies—Taylor (1950) relation for rise of a single spherical cap bubble in a liquid » b "0.71Jgd b (SF) (AF) . The scale correctio...

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