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Showing papers in "Chemical Engineering Journal in 1983"


Journal ArticleDOI
TL;DR: In this article, a two-step resistance model was developed for the adsorption of dyes on carbon, based on external mass transfer and pore diffusion, which enables the performance of an agitated batch adsorber to be predicted.

181 citations


Journal ArticleDOI
TL;DR: In this article, the batch gas absorption technique was used to measure gas volumetric mass transfer coefficients kLa for some gas-liquid and gas-water mixture, including liquid and gas.

129 citations


Journal ArticleDOI
TL;DR: In this paper, a model for the fermentation kinetics of ethanol production by Zymomonas mobilis is described, and the model assumes that the predominating factors influen

70 citations


Journal ArticleDOI
TL;DR: In this article, a modified simulation model is developed, which is capable of producing bivariate drop size-concentration distributions for liquid-liquid dispersions in stirred tanks under steady state or unsteady state operating conditions.

64 citations


Journal ArticleDOI
TL;DR: The reversible reaction of the decomposition of BaO2 and subsequent oxidation of the corresponding BaO was investigated in this article, where the authors evaluated the possibility of using the reversible reaction to evaluate the feasibility of using BaO 2 as a biometric.

63 citations



Journal ArticleDOI
TL;DR: In this paper, an outgrowth of an experimental phase in developing a reactor with efficient removal of heat and mass at the reaction surface is presented. And a theoretical approximate analysis is presented and satisfactorily compared with the experimental findings.

43 citations


Journal ArticleDOI
TL;DR: In this article, gas holdup and axial heat dispersion coefficient measurements in the presence of an electrolyte solution were performed in order to investigate the effect of the electrolyte on the axial temperature.

37 citations


Journal ArticleDOI
TL;DR: In this paper, the mean gas holdup has been measured in a cocurrent downflow glass column, 7.5 cm in internal diameter and 265 cm in height, using air and liquids such as water, aqueous alcohol solutions and sodium chloride solutions.

27 citations



Journal ArticleDOI
TL;DR: In this paper, a multiple-reaction model is presented for the burning reaction of carbonaceous deposits, usually termed coke, on fouled catalysts, consisting of carbon dioxide and carbon dioxide.

Journal ArticleDOI
TL;DR: The spherical light model was used to evaluate, for an annular photoreactor, the radiation intensity profiles of the inner wall and the flow rate of the flow in this article.

Journal ArticleDOI
TL;DR: In this article, a comprehensive model of biofilm reactors is developed, which assumes a zero-order reaction of a limiting substrate and a diffusional mass transport through the biofilm; in the diffusion-controlled regime Model II includes liquid film mass transfer resistance.

Journal ArticleDOI
TL;DR: In this paper, the dynamic behavior of fixed beds in which nonlinear adsorption is coupled with chemical reaction is analyzed using the method of characteristics, where reversible reactions A → B (first, zero or second order) coupled with the nonlinear adorption of one or both species are treated.

Journal ArticleDOI
TL;DR: In this paper, a non-linear fixed bed adaption of a single component under non-isothermal conditions and with flowrate variations due to adsorption and temperature changes is studied.

Journal ArticleDOI
TL;DR: In this paper, the absorption of SO2 into aqueous Na2CO3 solution accompanied by the desorption of CO2 was studied both theoretically and experimentally both in the laboratory and in the field.


Journal ArticleDOI
TL;DR: In this paper, a modified version of the Danckwerts boundary conditions for the axial dispersion model has been proposed, where the dispersion coefficient is determined mainly by convection rather than by diffusion.

Journal ArticleDOI
TL;DR: In this article, the problem of absorption of two gases with reaction in an aqueous slurry of fine catalyst particles was theoretically analyzed on the basis of the film theory model.


Journal ArticleDOI
TL;DR: Proposition d'une nouvelle methode de mesure de l'efficacite de la separation obtenue dans des essais de flottation de charbon as mentioned in this paper.

Journal ArticleDOI
TL;DR: In this paper, the equimolar, non-equimolar and simultaneous mass and heat transfer models of multicomponent distillation are developed and verified and the equations composing the models are based on the linearized diffusion theory and can be divided into three separate groups: interfacial conditions describing the gas-liquid interface; kinetic relations, which define the mass fluxes and whose general form results from the type of transfer assumed; balance equations, associated with the model employed for a contact stage and determined by the fluxes previously estimated.

Journal ArticleDOI
TL;DR: In this article, gas bubble distributions, estimated from local holdup measurements, and flow profiles near the vessel wall, deduced from wall pressure measurements, were found to be quite similar to that for unaerated agitation, and the circulation flow of liquid Mixing measurements under aeration for comparison with single-phase measurements obtained at lower speeds to maintain the same total power input under lower speeds.

Journal ArticleDOI
TL;DR: In this paper, the ordinary block pulse functions with constant subinterval length are modified to generalized block pulse function (GBPF) with time-constrained time complexity.

Journal ArticleDOI
TL;DR: In this paper, the exact expressions for the light intensity distribution and for the absorption efficiency are established with four different assumptions for the luminance distribution at the reactor wall, namely diffuse emission (bi- and tridimensional) and specular emission (i-and triddimensional) for the decomposition of tetrachloroplatinic acid, and it is concluded that sophisticated mathematical models are useless for the design and scaleup of photoreactors, at least for the kind of reaction considered here.

Journal ArticleDOI
TL;DR: In this article, the problem of synthesizing an optimal multicomponent separation flow sheet according to capital and operating expenses is solved by a branch and bound, and the distillation columns are computed using a short-cut method.

Journal ArticleDOI
TL;DR: The problem of heterogeneous catalyst deactivation by parallel or series poisoning involves solving a set of coupled differential equations describing as mentioned in this paper, which is the same problem as the one we are solving here.

Journal ArticleDOI
TL;DR: In this paper, the permselectivity of calcium ion relative to potassium ion, TCaK, in sugar solution has been studied with an electrodialyzer which consists of eleven pairs of anion exchange membranes.

Journal ArticleDOI
TL;DR: In this paper, experimental data on vertical baffle tube wall heat transfer in newtonian liquids obtained in a cylindrical vessel with turbines of various sizes was used to obtain a regression relation which is suitable both for heating and for cooling applications within the range of the variables investigated.

Journal ArticleDOI
TL;DR: In this paper, the limiting current technique was used to obtain the liquid-solid mass transfer coefficient in two types of fixed electrochemical reactor at low Reynol, which is the same as the one used in this paper.