Effects of solvent-concentration, adsorption temperature and pressure

Effects of solvent-concentration, adsorption temperature and pressure.1526... 

Effects of solvent-concentration, adsorption temperature and pressure For safety reasons the concentration of combustible solvent vapors should be less than 50% of the lower explosive limit. The adsorption capacity of adsorbents increases as the concentration of the solvents increases. But the length of the MTZ is proportional to the solvent concentration. Because of the adsorption heat, as tire adsorption front moves through the bed also a temperature front follows in the same direction. To deal with the adsorption heat the inlet solvent concentration is usually limited to about 50 g/m. ... 

Surface tension is ususally measured in the presence of air (component 2), and the effects of concentration of another component, temperature, and pressure on the surface tension are examined to determine respectively the relative adsorption, the entropy change, and the volume change upon adsorption. For this examination, the two coefficients to be eliminated are those of the solvent (component 1), and air ... 

The effect of temperature, pressure, and co-solvent on the effectiveness of this process were investigated. For all cases, the adsorbate was found to be greater than 94 wt.% monocrotaline and averaged 98 wt.% (Table 1). The NMR spectra of the adsorbate indicated that no lipids were present and that the structure of the monocrotaline was intact. The unadsorbed and entrapped fractions were analyzed and found to contain no monocrotaline. Thus, the resin was both highly selective toward monocrotaline and highly efficient in its adsorption regardless of temperature, pressure, or co-solvent concentration. 

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