[PDF] Top 20 Braz. J. Chem. Eng. vol.24 número1

... Another factor that causes the higher rate of decrease in height of the liquid pool for higher superficial gas velocities is the lower residence time of the bubbles, which induces a [r] ... See full document

... Myoglobin was also immobilized in a poly(vinylalcohol) membrane. Immobilization did not jeopardize protein functionality, as seen by the appearance of the membrane, which preserved th[r] ... See full document

... Liquid permeable capsules containing XAD TM 4 resin were developed and successfully tested for adsorption of phenol from water solutions in a closed circuit fluidized bed operating at[r] ... See full document

... All systems used in this paper have an objective function with multiple optimums and they have been applied for testing global deterministic optimization methods (Esposito and Flouda[r] ... See full document

... Ternary (liquid + liquid) equilibrium data for 24 systems including ionic liquids were correlated by the NRTL model for the activity coefficient. Molecular energy interaction and non randomness parameters were ... See full document

... This study will present results of synthesis and characterization of Aluminum and Titanium MCM-41 materials prepared in our laboratory using different surfactants and evaluated for th[r] ... See full document

... Four reaction classes (Figure 1) were studied using conversion data on 24 hydrogenation runs of synthetic feeds made with model compounds styrene, toluene, 1,7-octadiene and 1-octene,[r] ... See full document

... The drying experiments were conducted for two different frequencies of the rotating disk (responsible for the pulsation effect), two values of initial moisture content of the solid an[r] ... See full document

... radiation source, is important to assure that when the reaction begins, the variation in dye concentration due to degradation is not mistaken for the variation due to [r] ... See full document

... The aim of this research was to determine variations in temperature and moisture content in leaves and twigs in yerba maté at the heat treatment step, using heat and mass transfer an[r] ... See full document

... Pulp sample G (Table 1) was used to evaluate the effect of the main kappa number fractions on bleachability. Figure 1 shows the procedure used to separate the kappa number fractions. With this procedure it was possible ... See full document

... This second process is a decomposition reaction (A J B + C) where the products, species B and C, are selectively adsorbed in the micropores of adsorbent particles. It is assumed that there is no diffusion of ... See full document

... It was verified that not much more energy was consumed per unit of gas flow in fluidized beds of perforated packings than in those of conventional plain sphere packings, since the perf[r] ... See full document

... When Figures 6 and 7 are analyzed together, we can conclude that the two proposed geometric modifications of the conventional cyclone used by Patterson and Munz (1989) were able to m[r] ... See full document

... (2000) also studied the effect of temperature on the extraction of proteins (zeins) from corn. They credited the positive effect of temperature on protein extraction to the fact that z[r] ... See full document

... At lower initial BSA and lysozyme concentrations, the adsorption capacities increased linearly with the initial protein concentration, suggesting that there were enough adsorption si[r] ... See full document

... intervals were used for the time discrete partitions because shorter time intervals at the start are essential (Lyra, 1993) to dampen the oscillations that damage FEM refinement; and [r] ... See full document

... In the case of turbulent round jets laden with solids, Laín and Aliod (2003) using a Reynolds stress model for the solid phase in a two-fluid-like approach, were able to capture the [r] ... See full document

... ƒ The proposed equations for prediction of the load in two-segment flights and the average length of particle fall generated very precise estimations from the experimental data. There[r] ... See full document

... The historic of characteristic time of freezing in Figure 3 show low level of oscillatory behaviour and fast convergence as well as good agreement with the experimental data when a co[r] ... See full document