Showing papers in "Chemical Engineering Science in 1973"

TL;DR: In this article, a pilot scale binary distillation column operated under the control of an IBM 1800 digital computer has been studied for disturbances in feed flow rate, and two alternate control systems, namely a noninteracting control system and a ratio control system were evaluated.

TL;DR: In this paper, several possible solutions to the problem of creeping flow relative to an isolated permeable sphere are discussed and compared quantitatively, and the most satisfactory solutions are based upon Brinkman's extension of Darcy's Law.

TL;DR: In this paper, a rigorous theoretical treatment of the transport equations for multi-phase systems is presented, and the results have application in the analysis of a variety of processes including liquid-liquid extraction, gas-liquid mass transfer, and chemical reaction and dispersion in multiphase systems.

TL;DR: In this article, the dissolution of dolomite in hydrochloric acid was studied with the aid of a rotating disk system and it was found that the dissolution process is surface reaction rate limited even at low disk rotation speeds.

TL;DR: In this article, the axially symmetric converging hoppers with axial symmetry were considered, and switch stresses were derived for a vertically-sided silo. But the analysis was limited to axially-symmetric bunker structures, and it was not suitable for estimating wall stresses for structural design.

TL;DR: In this article, the approximate theory of Walker is extended to distinguish between the stresses developed during the initial filling of the silo (static) and those developed during flow (dynamic) conditions.

TL;DR: In this article, the reduction of porous nickel-oxide pellets with hydrogen within the temperature range 224 −412°C was investigated using a previously published model for gas-solid reactions.

TL;DR: The flow in the impeller region of an agitated tank dispersing gas in liquid has been studied using a rotating TV camera and fixed still and high speed cine cameras as discussed by the authors.

TL;DR: In this paper, the kinetics of absorption of lean CO2 in a suspension of lime was studied in 5 and 20 cm i.d. bubble columns and a 12.5 cm mechanically aginated contactor.

TL;DR: In this article, a reaction de decomposition thermique du bicycloheptene is described, which is a reaction of decomposition in phase gazeuse, based on the reaction of deformation de reactif a traversee.

TL;DR: In this paper, a theory of the aeration produced by the impact of a high speed water jet on a water surface is given, and the boundary conditions for the theory have a physical meaning.

TL;DR: In this paper, a predictive model for the outputs of tube bundles and the optimum operating conditions was developed for a variety of tubular gaseous diffusion cells and the results permitted the development of a model for tube bundles.

TL;DR: In this article, the Sauter mean droplet diameter was found to depend on the product of plate amplitude and frequency and on the system properties, but it was not in general affected by the throughput.

TL;DR: In this paper, the behavior of a trickle bed in which the catalytic packing was incompletely wetted was investigated using the selective hydrogenation of crotonaldehyde to n -butyraldehyde as a model reaction.

TL;DR: In this article, it was shown that the effective interfacial area for gas absorption with chemical reaction depends on γ, where γ is the factor by which reaction increases capacity of absorbent factor and reaction increases rate of absorption.

TL;DR: In this article, it is shown that the population balance equation derived by number balance is not always correct in the sense that the rates at which existing particles disappear and new particles appear as normally written are valid only under suitable (but not universally applicable) assumptions which are naturally brought to light by the framework presented herein.

TL;DR: In this paper, the statistical thermodynamic model for the analysis of non-polar species in molecular sieve zeolites is extended to the sorption of binary mixtures, and a simple method of predicting multi-component sorption equilibria from the Henry constants for the pure components is provided.

TL;DR: In this article, the creeping flow of a Bingham fluid past a circular cylinder was analyzed by using variational principles, and the drag forces derived from these results were compared with those estimated by a slip-line analysis.

TL;DR: In this article, the fluid velocity required to initiate sliding, rolling and suspension of single particles in turbulent horizontal and inclined pipe flow is calculated and experimentally verified using force and torque balances which include drag, lift, frictional and gravity effects.

TL;DR: In this article, a surface potential theory of multilayer adsorption is proposed; it is based upon the formation of an ideal adsorbed solution at high surface coverage where the vapor is close to condensation.

TL;DR: In this paper, a general structural model for the reaction of a porous solid with a gas was proposed, which occupies the domain between the asymptotes corresponding to first-order and zeroth-order kinetics.

TL;DR: Using the Rouse-Zimm model of the marcomolecule, the stress constitutive equation of dilute polymer solutions is derived in the form of a functional of temperature and deformation histories as mentioned in this paper.

TL;DR: In this paper, the theory of gas absorption accompanied by fast pseudo-mth order reaction was used to obtain values of effective interfacial area in a packed column, irrigated with aqueous solutions and provided with 1 in.C. Raschig rings, 1 in in.P.V.

TL;DR: In this article, the effects of liquid flow rate, packing size, surface tension and viscosity of irrigation liquid on the liquid spread factor are studied, and the values of liquid spread factors are correlated for a wide range of packing size.

TL;DR: In this article, a formulation for the reaction between two solid species which proceeds through gaseous intermediates, involving the net generation of gases, is presented for the reduction of metal oxides with carbon, which is characterized by two dimensionless parameters which include the reaction rate constants, the shape, size and the relative amount of the solid reactants.

TL;DR: In this paper, methods for the prediction of critical loci, upper and lower critical end points, and azeotropic lines in binary and multicomponent mixtures are described.