Results 221 to 230 of about 170,570 (262)

Mass transfer in cocurrent gas-liquid flow: Gas side mass transfer coefficients in upflow, interfacial areas and mass transfer coefficient in gas and liquid in downflow

Chemical Engineering Science, 1978
Abstract A comparison of the values of interfacial area in cocurrent downward flow of gas and liquid with those obtained in upward flow revealed very little difference. Volumetric as well as true liquid side mass transfer coefficients in downflow were found to be several times lower than in upflow. Only in the smallest 10 mm tube a dependence of the
R.V. Shilimkan, J.B. Stepanek
openaire   +1 more source

Mass transfer coefficients in fluidized systems

Chemistry and Technology of Fuels and Oils, 1967
1. During the adsorption of nitrogen oxides by the ASM grade silica gel, the increase in relative saturation is accompanied by a rapid fall in the total mass transfer coefficient caused by the increased diffusion resistance of the adsorbate in the pores of the adsorbent. 2.
openaire   +1 more source

Physical significance of the mass transfer coefficient

The Chemical Engineering Journal, 1987
Le coefficient de transfert de matiere represente la vitesse maximale, par rapport au melange, avec laquelle un composant peut etre transfere. Le coefficient de transfert de matiere n'a pas seulement les dimensions de la vitesse, mais aussi la meme signification ...
openaire   +1 more source

Determination of mass transfer coefficient for condensation simulation

International Journal of Heat and Mass Transfer, 2019
Abstract Mass transfer calculation through vapor-liquid interface is the most important key issue for condensation simulation. However, it is a challenge to determine the coefficient of mass transfer model and the uncertain coefficient leads to unclear physics of the calculated results.
Yuan Tang, Shao-long Zhu, Li-min Qiu
openaire   +1 more source

The studies on the oxygen mass transfer coefficient in a bioreactor

Process Biochemistry, 2001
Abstract The effects of process variables on the volumetric liquid phase mass transfer coefficient of oxygen, k L a , in a stirred bioreactor were investigated by the static gassing-out method. The process variables chosen were impeller speed, air flow rate, temperature, viscosity and loading (%) of biomass support particles (BSP).
GAYIK, S, Ozbek, Belma
openaire   +2 more sources

Mass Transfer Coefficients in Vapour Extraction (VAPEX)

Canadian International Petroleum Conference, 2007
Abstract The in-situ extraction of heavy oil and bitumen requires enhanced oil production techniques to sufficiently reduce the viscosity of the oil to produce it at economical rates. Vapour extraction (VAPEX) and warm VAPEX (where the solvent condenses in-situ) are two possibilities for producing highly viscous in ...
L.A. James, I. Chatzis
openaire   +1 more source

Calculation of the mass transfer coefficient for the combustion of a carbon particle

Combustion and Flame, 2010
In this paper we address the calculation of the mass transfer coefficient around a burning carbon particle in an atmosphere of O2, N2, CO2, CO, and H2O. The complete set of Stefan-Maxwell equations is analytically solved under the assumption of no homogeneous reaction in the boundary layer.
openaire   +3 more sources

Calculation of Photon Mass Energy-Transfer and Mass Energy-Absorption Coefficients

Radiation Research, 1993
Calculations of mass energy-transfer and mass energy-absorption coefficients for photon energies from 1 keV to 100 MeV have been developed, based on a re-examination of the processes involved after the initial photon interaction. The probabilities for the initial interaction are from the current photon interaction cross-section database at the National
openaire   +2 more sources

Enhancement of mass transfer coefficients in spiral films

International Journal of Heat and Mass Transfer, 1997
The wetted columns both with tangential nozzles and turbulence promoters are of great interest. The spiral motion of a liquid film gives a good stability and a great turbulence to the film. It results in the increase of the rate of transfer processes compared with those both in smooth and rough wall columns.
openaire   +1 more source

Mass-Transfer Coefficients in Dense Binary Mixtures

Theoretical Foundations of Chemical Engineering, 2005
A modified elementary kinetic theory of gases is generalized to arbitrary densities of mixtures (from the gaseous to the solid state). Derived expressions for the mass-transfer coefficients are based on the lattice gas model, which is applicable to all the three aggregation states. For a rarefied gas, the expression for the mutual diffusion coefficient
openaire   +1 more source