LIMA, L. M. R.; http://lattes.cnpq.br/2234236872716926; LIMA, Lígia Maria Ribeiro.
Resumo:
The objective of this work was to evaluate the dynamics of adsorption of
gasoline (adsorbate) using sugar-cane bagane in powder form as adsorbent, in a
fixed bed in enlarged scale, through the analysis of breakthrough curves. The column
used for adsorption consists of a glass cylinder with 60.0 cm height and 6.0 cm
diameter. Initially were made analyses of chemical and physical characterization of
cane bagane in powder form, as: chemical composition; dry matter percentage,
humidity, ashes, organic matter, rude protein, cellulose and lignin. For evaluation of
porous structure of the biomass sugar-cane pulp three analyses of the material were
accomplished in powder form: superficial area, porous volume and porous diameter.
With base in data obtained by experimentals for obtaining of breakthrough curves,
dynamics of fixed bed can be evaluated in scale enlarged through the evaluation of
results verified by experimental planning and th rough application of
phenomenological modelling, using Lineal Impelling Force model. It was possible to
observe that largest values of times of break of the curves were found for smallest
flow rates with the three concentrations of entrance of simulate eff luent. Analyzing
Pareto diagram was observed that the influence of interaction of initial concentration
of gasoline with the operation flow rate is the most significant factor followed by
height of fixed bed of biomass. It was also verified that the concentration of gasoline
is the less important factor in biomass adsorption process. It was observed through
the values obtained of mass transfer constant, using Lineal Impelling Force model,
that there was a tendency for increase of mass transfer coefficient, as the flow rate
increased. With those results, can be concluded that mass transfer coefficients in the
solid, calculated in function of volumetric flow rate can be represented by a lineal
relationship in the studied experimental conditions.
