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Showing papers in "Chemical Engineering Journal in 1975"



Journal ArticleDOI
TL;DR: In this article, an interpretative review of the literature on flow through porous media is presented, focusing on those aspects of flow and pore structure that deal with the relationship between flow and structure.

163 citations


Journal ArticleDOI
TL;DR: A review of foam separations reported in the world literature in the period 1970-1974 is presented in this paper, with the objective of which is the removal and concentration from dilute aqueous solution of surface-active agents; or of charged inorganic species (colligends) foam separated by surfactants.

98 citations


Journal ArticleDOI
TL;DR: In this article, a mass transfer model which describes oxygen transfer from bubbles under a water surface created by the impact of a plunging water jet is proposed, which leads to the conclusion that direct application to waste water treatment may be promising, especially when the relative simplicity of the equipment is considered.

68 citations


Journal ArticleDOI
TL;DR: In this article, it is shown that data plots using the dimensionless groupings obtained from the Kolmogoroff theory are unsatisfactory, because of the swamping effect in the groups of the enormous range of particle size as compared to the ranges of the other variables.

48 citations


Journal ArticleDOI
TL;DR: In this article, an approximate solution was obtained using a finite element method to solve the equation of motion governing the fully developed, incompressible Newtonian flow within a straight tube with internal fins.

34 citations


Journal ArticleDOI
TL;DR: In this paper, the authors discuss the development of the intermediate chemicals industry and present the difficulties in formulating a theory of development for the intermediate chemical industry, also discuss the dynamic models of industrial development Interface between economy and industry and a short range allocation model is elaborated.

31 citations


Journal ArticleDOI
TL;DR: The thermal conductivity of porous pellets depends on the conductivities of the solid and fluid phases, the pore structure and the contact area between the particles making up the pellet as discussed by the authors.

31 citations


Journal ArticleDOI
TL;DR: In this paper, the effects of non-Newtonian liquids on the behavior of cocurrent gas-liquid slug flow has been investigated and a new electrically resonating void fraction meter was devised which worked satisfactorily for a wide variety of polymer solutions.

31 citations


Journal ArticleDOI
TL;DR: In this paper, power and mixing time measurements were carried out with anchor, pitched blade anchor and helical ribbon agitators, and the relationship of Po = f(Re) and Nθ = f−Re was found and compared with the data available.

27 citations


Journal ArticleDOI
TL;DR: In this article, the axial dispersion model is used to develop an analysis of a bubble column slurry reactor (BCSR) that takes into consideration the longitudinal mixing in each of the three phases of the reactor.

Journal ArticleDOI
TL;DR: In this paper, an equation for the length of a column required to obtain a given resolution between two components from expressions for the first and second moments of chromatographic pulses is derived for gas-solid, gel permeation, and liquid-solid chromatography.

Journal ArticleDOI
TL;DR: In this article, a methode originale d'exploitation des donnees relatives a la croissance and a la dissolution de cristaux d'acide cittique monohydrate en lit fluidise a 250°C.


Journal ArticleDOI
TL;DR: Nessary and sufficient conditions for uniqueness or multiplicity of the steady states, as well as for their stability, are derived and expressed in diagrams and used as guides for the operation of enzyme reactors.

Journal ArticleDOI
TL;DR: The thermal conductivities of catalyst pellets composed of silica, silica-alumina and nickel catalysts using these support materials have been measured by a transient method as discussed by the authors, and the results are compared with the predictive models given in the preceding paper.

Journal ArticleDOI
TL;DR: In this paper, the backmixing effect on the perfornwnce of a pilot-scale hydrodesulfurization reactor when both gas and liquid are passed cocurrently and upward through the reactor was investigated.

Journal ArticleDOI
TL;DR: The algorithm for the calculation of βi from a rational z- transfer function is developed and Moments matching for the simplification of z-transfer functions is discussed.

Journal ArticleDOI
TL;DR: The results of a study of solid-liquid spouted bed expansion, using an 8.8 cm i.d. column with a 30°, 60° or 180° conical base, are reported in this article.

Journal ArticleDOI
TL;DR: In this paper, the isothermal diffusion coefficient based on modified length has been derived from steady state drying experiments by using only data for a sample moisture content below its initial value, and a correction has been made for distortion of the unidirectional flow pattern.

Journal ArticleDOI
TL;DR: In this paper, suspension and pastes of bentonite in water and titanium dioxide in linseed oil were used to examine various concepts and models for characterising thixotropic materials, and various problems involved in the evaluation of viscometric data were then identified and analysed.

Journal ArticleDOI
TL;DR: In this article, the wall temperature profile for laminar flow of a power-law pseudoplastic fluid in a circular tube is developed for any prescribed wall heat flux condition.

Journal ArticleDOI
TL;DR: In this article, a quantitative description of various mechanisms of granulation is discussed and a similarity solution is obtained by numerically solving the population balance describing the granulation process, which describes by an unique curve the time dependent size spectrum.

Journal ArticleDOI
TL;DR: In this paper, an approximate formula for pressure drop during the flow of Stokesian fluids through conical discharge ducts is presented, and the experimental verification of the formula revealed the significance of exit effects.

Journal ArticleDOI
TL;DR: In this paper, the effect of distributor type on conversion is largely a consequence of the effect on initial bubble size, provided that initial mal-distribution of gas is avoided, and the results obtained confirm the validity of the Fakhimi formula for the design of multi-orifice distributors.

Journal ArticleDOI
TL;DR: In this paper, the authors measured the mass transfer rate between a cylindrical solid surface and an electrolyte with a flow rate giving a range of Reynolds number from 50 000 to 200 000.

Journal ArticleDOI
TL;DR: In this paper, a biochemical reacting system schematized by the diffusion model and Monod's kinetics is considered, and a critical value of parameters to avoid the so-called "washout" condition is obtained through inspection of the analytical solution of the linearized equations.


Journal ArticleDOI
TL;DR: In this article, it was shown that the axial stress rises to levels much higher than previously reported and that the behaviour of polyacrylamide solution is elastic in its stress/strain response.

Journal ArticleDOI
TL;DR: In this article, the suspension of spheres by fully developed flow in a vertical pipe has been investigated for particle Reynolds numbers between 2 and 10 000, sphere-to-conduit diameter ratios between 0.046 and 0.274 and tube Reynolds numbers ranging from 25 to 27 000.