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The industrial development which has provided a significant progress in the improvement of the life quality has also brought some problems to the environment. In this context, the mobility industry has generated several types of pollutants. Among these pollutants stands out the ammonia gas, that can be generated in a direct or indirect way, through fuel burning of several types of vehicles or through responsible industrial processes for the production of components and input to this industry. For being an extremely toxicant gas, it is of great importance to develop techniques that facilitate reutilize and to avoid the discard of that gas discards in the atmosphere. This way, this work had as its main objective to study the purification of the ammonia gas through the adsorption in activated coal, in which the influences of the temperature and mass of the bed in the process of adsorption were appraised.

This study aimed to propose a method for measurement and estimation of the liquid distribution efficiency of a pilot-scale packed tower, filled with 1″ Pall rings (plastic and ceramic). The study was carried out analyzing three major conditions: water feed flow (1, 2 and 3 m3/h), feeding position (center, 7.5 and 15 cm from the center) and packed height (30, 60 and 90 cm). The liquid distribution was assessed as water columns in tubes coupled to the bottom of the column. Non-uniform distributions were obtained from the experiments, and therefore the distribution efficiencies were estimated using a 5 parameter model which correlates the efficiency to the tubes water columns. Two efficiency factors were defined (global and dispersion efficiencies). The efficiency of two spray-nozzle distributors were also analyzed with 1″ Pall ceramic rings. A sensible improvement in water distribution was obtained, i e, an increase in the efficiency factors was verified.

The present work was aimed at evaluating, on a bench scale, the influences of the operation temperature and the Ca/S molar ratio in the fraction of SO2 removal in a continuous binary fluidized bed reactor, through a reaction with dolomitic limestone. It showed a significant contribution of the added Ca/S molar ratio for the 500-600°C range, as well as the strong influence of the temperature in the gas removal fraction for the 550-700°C range.}

The ammonia is one of the toxic gaseous polluters present in countless industrial processes being of great importance in the industry of motion since it is the raw material for the manufacture of plastics, rubbers, synthetically fibers, combustibles and mirror silvering. Anosmia, vomiting, glottal edema, blindness and respiratory failure are the main symptoms of the exposition to ammonia. The systems applied for the treatment of gases and vapors besides minimizing the impact of pollution over the environment are largely used in the recovery of high cost gases and treatment of same when they have corrosive characteristics. Within the industrial methods for depuration of gases, the adsorption has been a reason for many studies and researches to allow the reuse of the material at low operational costs.