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Showing papers in "Chemical Engineering Journal in 1982"


Journal ArticleDOI
TL;DR: In this paper, the flow characteristics of inverse fluidization utilizing low density spherical particles are experimentally investigated for both the liquid-solid and gas-liquid-solid systems, both empirically and semi-empirically.

125 citations


Journal ArticleDOI
TL;DR: In this paper, a review of the techniques of parameter estimation (moment method, weighted moment method, transfer function fitting, Fourier analysis and time-domain analysis) from measurements of tracer input and response signals are examined.

90 citations


Journal ArticleDOI
TL;DR: In this paper, the effect of recycling on plant dynamics is examined, and the overall plant response will have a longer characteristic time and higher steady-state gain than traditional plant response.

81 citations


Journal ArticleDOI
TL;DR: In this paper, the mass transfer characteristics of liquid jet mixers with a down-flow or up-flow jet were investigated by using a cylindrical and a upflow jet.

71 citations



Journal ArticleDOI
TL;DR: In this paper, a comparison of kla values determined by the dynamic method in several systems (water, Na2O4, KCl and NaCl solutions, and glucose solutions containing the enzymes catalase and glucose oxidase) in a mechanically agitated bubble tank was made.

55 citations


Journal ArticleDOI
TL;DR: The role of axial diffusion in the direction of convection transport, which is usually neglected in mass (heat) transfer problems, is systematically investigated in this article, where analytical solutions and asymptotic expressions are derived for cases of mass transfer coupled with a homogeneous and heterogeneous irreversible chemical reaction of the first order in plug flow, in Couette flow and with a moving interface.

46 citations





Journal ArticleDOI
TL;DR: The results of an experimental study of solid-liquid fluidized bed expansion are reported in this paper, where the correlational equation ϵ = (F D /F G ) 0,209 obtained in the paper is found to be in agreement with both the Richardson-Zaki equation as well as with the equation of Todes et al.

Journal ArticleDOI
TL;DR: In this paper, energy consumption and aeration efficiency in a 15 dm 3 concentric cylinder gas-lift fermentor with the ejector nozzle located at the base of the central tube were investigated.

Journal ArticleDOI
TL;DR: In this paper, a modified Reynolds number has been introduced into the heat transfer equation which contains the product dn representing the fluid velocity at the tube baffle and the external tube diameter d o.

Journal ArticleDOI
TL;DR: In this paper, the authors propose a method to solve the problem of the "missing link" problem in the context of biomedical data.http://dx.doi.org/10.1016/0300-9467(82)85011-9

Journal ArticleDOI
TL;DR: In this article, block pulse functions are applied to solve population balance equations which are described by stretched differential and integro-differential equations, and the method is straightforward and suitable for digital computation.

Journal ArticleDOI
TL;DR: In this paper, the equations of separation applicable to the whole range of concentration in various types of improved thermal diffusion columns have been derived in a common form, where the optimal conditions are exactly the same as those for the equifraction solution, when 0.3 < c < 0.7.

Journal ArticleDOI
TL;DR: In this article, a thermodynamic model is developed to describe the solubility of calcium sulphate in salt water, based on the ionic atmosphere theory of Debye and Huckel, Born model contribution, and local compositions of the non-random two-liquid model.

Journal ArticleDOI
TL;DR: In this article, the rejection rate R depends on the chromium (VI) concentration and on pH, and the determination of the polyelectrolyte-Cr(VI) complex stability constant gives pK = 4.


Journal ArticleDOI
TL;DR: In this paper, a statistical analysis of data on local gas velocities at the exit from the bed of a packed column has been carried out using data resulting from hot wir.

Journal ArticleDOI
TL;DR: In this paper, the gas-solid noncatalytic reaction of an isothermal pellet is described by a variable-size-grain model and the shrinking core model is used to represe

Journal ArticleDOI
TL;DR: In this article, an experimental study of free convection heat transfer to water and air from horizontal cylinder of about 63 mm and 35 mm o.d. with smooth surfaces and three kinds of artifical rough surfaces was conducted.

Journal ArticleDOI
TL;DR: In this article, the experimental data base is reduced by a least squares technique to a dimension equal to that used in the approximate solution of the model and the collocation ordinates are compared with the experimental values using three different methods.


Journal ArticleDOI
TL;DR: In this paper, the first two moments of the impulse response in a leading term of a Laguerre polynomial series expansion were used to obtain an approximate expression for breakthrough curves in isothermal packed-bed adsorbers and reactors.

Journal ArticleDOI
TL;DR: In this paper, steady-state multicomponent mass transfer between an interface and a turbulently flowing fluid phase is analyzed using a turbulent eddy diffusivity ϵm.

Journal ArticleDOI
TL;DR: In this article, a fast-response hydrogen analogue to the well-known membrane-covered oxygen electrode was constructed, based upon anodic oxidation of hydrogen on Pt in concentrated sulphuric acid.

Journal ArticleDOI
TL;DR: In this article, the absorption rate and mechanism of NO2-N2O4 gas mixtures diluted with nitrogen into nitric acid solutions were investigated in a wetted wall column at 20 °C and 30 °C.

Journal ArticleDOI
TL;DR: In this paper, a linear mathematical model for gas-liquid chromatography is presented for application to either analytical or larger-scale equipment, which includes the effects of axial dispersion, interparticle mass transfer, intraparticle gas diffusion, and diffusion in a thin, uniform thickness liquid film.

Journal ArticleDOI
TL;DR: In this article, the authors formulated and solved the optimization problem of minimum economic costs for steady-state multistage fluidized drying, where the optimal decision variables pertain to the inlet gas state at each stage, are temperatures, humidities and flows of gas.