Results 221 to 230 of about 933 (258)

Structured packing liquid holdup in cryogenic systems

International Journal of Refrigeration, 1997
Abstract Experimental results and a theoretical analysis are presented on structured packing liquid holdup under cryogenic conditions. The experimental tests were performed on a novel laboratory unit incorporating a gas lift pump to recirculate the cryogenic liquid in a flow visualization dewar.
R Potthoff, P Sweeney, K.R Krishnamurthy
openaire   +1 more source

Liquid distribution and holdup in the random packed column

Flow Measurement and Instrumentation, 2018
Abstract In the present work, a third-generation gamma transmission tomography system was used to evaluate the liquid distributions of a Raschig rings random packed column, at two different water flows: 2 and 6 l/min. For each water flow, the measurements were carried out at nine column heights.
A.F. Velo, D.V.S. Carvalho, M.M. Hamada
openaire   +1 more source

Holdup of liquid draining from inclined tubes

International Journal of Multiphase Flow, 1984
Etude analytique dans le cas de tubes dont l'angle d'inclinaison α par rapport a l'horizontale est 0°
J.J.J. Chen, P.L. Spedding
openaire   +1 more source

Liquid holdup in horizontal two-phase gas—liquid flow

Journal of Petroleum Science and Engineering, 1996
Abstract The purpose of this study was to simplify and improve the mechanistic model developed by Taitel and Dukler (1976) for estimating the liquid holdup in horizontal two-phase flow. An experimental study was first conducted to develop a data bank used for evaluation and improvement.
openaire   +1 more source

Liquid holdup in the three-levels-of-porosity reactor

Chemical Engineering Science, 1999
Liquid holdup was measured as function of gas and liquid mass flow in the three-levels-of-porosity (TLP) reactor. Packing material and bed height were varied. Because a TLP reactor contains layers of catalyst there is an additional bed holdup compared to conventional trickle-bed reactors.
B.W. van Hasselt, H.P.A. Calis, S.T. Sie, C.M. van den Bleek   +3 more
openaire   +1 more source

On dynamic liquid holdup determination by the drainage method

Chemical Engineering Science, 1996
A careful examination of the liquid drainage in packed-bed reactors using liquid superficial velocities characteristic of trickle flow regime and no gas velocity is both experimentally and theoretically carried out. True free-flowing or dynamic liquid holdups are determined in two different reactors packed with porous and nonporous particles employing ...
G. Urrutia, P. Bonelli, M.C. Cassanello, A.L. Cukierman   +3 more
openaire   +1 more source

The Effect of Nanoparticles on Liquid Holdups in a Randomly Packed Liquid-Liquid Extraction Column

Synthesis and Reactivity in Inorganic, Metal-Organic, and Nano-Metal Chemistry, 2015
In the present study, the dispersed phase holdup was measured in a randomly packed column filled with stainless steel Raschig ring packings using water-toluene chemical system. Based on holdup data, the results were analyzed with the aim of determining the influence of dispersed phase flow rate and drop diameter in the presence and absence of silica ...
Gita Nematbakhsh, Ahmad Rahbar Kelishami
openaire   +1 more source

Liquid holdup in semi-batch cellular foams

Chemical Engineering Science, 1983
Abstract This paper presents a new model to predict liquid holdup profiles in serni-batch cellular foams. The model is based on two basic processes of film thinning and flow through Plateau borders. It takes into account the mobility of Plateau border walls, as decided by the surface viscosity; and the mobility of the film surface, as dictated by the
Desai, Dilip, Kumar, Rajinder
openaire   +1 more source

Evolution of liquid holdup profile in a standing protein stabilized foam

Journal of Colloid and Interface Science, 2004
Evolution of liquid holdup profile in a standing foam formed by whipping and stabilized by sodium caseinate in the presence of xanthan gum when subjected to 16 and 29g centrifugal force fields was measured using magnetic resonance imaging for different pH, ionic strength, protein and xanthan gum concentrations.
Zebin, Wang, Ganesan, Narsimhan
openaire   +2 more sources

Liquid axial dispersion and holdup in column leaching

Minerals Engineering, 2006
The liquid phase hydrodynamics in column and heap leaching is a key design aspect that has attracted some attention, but was not yet completely elucidated. On the other hand, conventional trickle bed catalytic reactors have received enormous attention for many decades; however, the operational variables range in this case is generally far from the ...
openaire   +1 more source