8 research outputs found
Adsorption of Aromatic Mixtures from Solutions by Molecular Sieve 13X
Adsorption isotherms of 3 extracts (concentrated aromatics) have been determined on molecular sieve 13X from solution in iso-octane at 303 and 343 K. The concentration of aromatic compounds before and after adsorption was determined using ultraviolet spectroscopic method of analysis. Values of the adsorption capacity and adsorption coefficient were determined from an equation for pore filling model. The three extract fractions showed a strong affinity for adsorption by molecular sieve. Heats of adsorption of the 3 extract fractions were calculated from adsorption and found to be in the range of 4-20 kJ mol -1
Adsorption of Aromatic Compounds from Solutions on Molecular Sieve 13X
Measurements of the equilibrium extent of adsorption of individual aromatic hydrocarbons: mono, di, trinuclear aromatic and heterocyclo compounds from iso-octane solutions by molecular sieves 13X were carried out at 303 and 343 K and at concentrations up to 5 wt.% The limiting values of adsorption were essentially determined by using modified Brunauer-Emmett-Teller equation (BET). The coverages and numbers of adsorbate molecules occupied in the unit cell of the molecular sieves were calculated at different temperatures. The isosteric heats of adsorption of aromatic hydrocarbons were also determined using Clausius-Clapeyron equation. It was found that the heats of adsorption of aromatic compounds varied from 4 to 60 kJ mol-
Life at ultralow interfacial tension: wetting, waves and droplets in demixed colloid-polymer mixtures
67.30.hp, 68.05.Cf Structure: measurements and simulations, 68.37.-d Microscopy of surfaces, interfaces, and thin films, 64.75.Xc Phase separation and segregation in colloidal systems,
Evolutionary preference/utility functions: A dynamic perspective
preference analysis, dynamic models, bayesian analysis, sequential measurement,