Showing papers in "Chemical Engineering Journal in 1989"

TL;DR: The deformation-diffusion (EDD) model has been widely applied to interpret experiments showing an effect of mixing on the product distribution of the reactions between 1-naphthol and diazotized sulphanilic acid as mentioned in this paper.

TL;DR: In this article, anaerobic treatment of industrial waste-waters has gained considerably in importance since the early 70s, this is a result of increased knowledge of t It is concluded that while the ANB fluidized bed process has become an established technology, further improvements can still be expected.

TL;DR: In this paper, an analytical solution for the axial and transverse flow fields in laminar flow in porous channels for both a rectangular channel with one porous wall and a porous tubular channel is presented.

TL;DR: In this paper, extended empirical Langmuir, Freundlich and Redlich-Peterson formulate have been applied for the calculation of multicomponent adsorption equilibrium data for all combinations of three basic dye systems: Basic Blue 69 (B), Basic Red 22 (R) and Basic Yellow 21 (Y) on Activated Carbon (F400).

TL;DR: In this article, Baldyga and Bourne developed a simplified micromixing model to calculate the influence of partial segregation on the product distribution of competitive, consecutive and parallel reactions.

TL;DR: In this article, a 16 MW stationary fluidized bed boiler (FBB) was used to study the performance of lime capture by CaSO 4 in the particle phase and showed a marked falloff in sulphur capture at temperatures above about 880 °C.

TL;DR: Endo-polygalacturonase can be purified and isolated from an industrial pectolytic enzyme preparation using alginate as an affinity adsorbent in a fluid and the stability of the beads was tested in repeated adsorption/desorption experiments.

TL;DR: In this article, the Debye-Huckel relationship for solution phase activity coefficients and the Wilson equation for the resin phase were used to characterize binary ion exchange equilibria.

TL;DR: In this article, three different models for describing a fluidized-bed catalyst cracking regenerator are studied, namely the grid-effect, two-region and bubbling-bed models, with the proposed two thermally uniform stages to account for the heat balance.

TL;DR: In this paper, the rates of carbon dioxide absorption into aqueous and alcoholic (methanol, ethanol and 2-propanol) solutions of triethanolamine (TEA) were measured.

TL;DR: In this article, a dyeing process was analyzed on the basis of the parallel transport mechanisms of surface and pore diffusion using Langmuir and Freundlich isotherms.

TL;DR: In this article, the average and local air hold-up and heat transfer coefficient between an electrically heated cylindrical probe and air-water dispersion were measured as a function of time and interpreted to shed light on the mechanism of heat transfer between an immersed surface and a two-phase dispersion in the bubbling and churn-turbulent flow regimes.

TL;DR: In this article, a cross-linked chitosan (Chitopearl 3510) was used to obtain the equilibrium isotherm of bovin serum albumin.

TL;DR: In this article, the phase gazeuse dans a cyclone is considered comme reacteur chimique gaz solide, i.e., reacteur of the gas solide.

TL;DR: In this article, a parameter for the intensity of turbulent flow in bubble columns, a characteristic turbulent kinematic viscosity, is discussed, and a simple model for the turbulent flow is proposed.

TL;DR: In this article, the conductivite thermique de billes de zeolithe NaX is used to identify identifiee grâce a un modele a partir de mesures de la conductivité d'un.

TL;DR: This paper summarizes and organizes current literature and also details the experimental behavior of on-line and off-line variables of S. cerevisiae in glucose-limited-batch, fed- batch, and hollow-fiber bioreactors.

TL;DR: In this article, the optimal operating policies for a fed-batch bioreactor with two manipulated variables are developed using the results of the singular control theory and Pontryagin's maximum principle.

TL;DR: In this paper, the kinetics of methylcyclohexane over crushed honeycomb Pt-Al 2 O 3 were studied in a fixed bed reactor at atmospheric pressure in the temperature range 573 − 623 K. Mechanistic and simplified reaction rate expressions were considered.

TL;DR: The most effective method of improving fermentation yields was found to be a combined treatment of heat at 121 °C under pressure of 12 atm, prior to fermentation, with fermentation at the elevated pH of 65 as mentioned in this paper.

TL;DR: In this article, a perforated plate is used to separate liquid-liquid dispersions, where inversion of the phases occurs. But the inversion does not affect the performance of the dispersions.

TL;DR: In this paper, the aeration performance of a bubble column with 2 m 2 cross sectional area at water depths of 2, 3, 4 and 5 m was investigated using perforated rubber.

TL;DR: The kinetics of aerobic mixed cultures of microorganisms growing on phenol in shake flasks have been determined as discussed by the authors, and the data obtained show that at high CO 2, at high co

TL;DR: In this paper, the influence of liquid viscosity and liquid flow rate on the effective interfacial area for chemical absorption in a Raschig ring packed column was studied by absorbing carbon dioxide into potassium carbonate-bicarbonate-arsenite solutions.

TL;DR: In this article, a mathematical model based on the structural properties of the solid was used to describe the second step of the hydration leading to the interfacial reaction and diffusion parameters and activation energies for both parameters.

TL;DR: In this paper, an empirical correlation for predicting kLa values in trickling flow regime was proposed, where the measured kLa, ΔP/Z and β values for viscous solutions were about four times those observed for low-viscosity organic solutions.

TL;DR: In this paper, the rates of solid-liquid mass transfer with gas generation at the interface in solutions containing surfactants were measured using an electrochemical tec using an ECC.

TL;DR: In this paper, two modeles d'isothermes de solutions complexes, i.e., the modele de Langmuir and le modele of l'AIS (adsorption ideale de solutions), are proposed for decrire l'adoption competitive de composes aromatiques substitues, en solution aqueuse sur du charbon actif.