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PROCESS FOR THE REMOVAL OF ACID GASES FROM THE AIR AND FROM COMBUSTION GASES FROM BURNERS AND INTERNAL COMBUSTION ENGINES BY MEANS OF ABSORPTION WITH SODIUM HYDROXIDE SOLUTION AND PROCESS FOR OBTAINING SODIUM CARBONATE IN ORDER TO ACQUIRE CARBON CREDITS

  • US 20130115151A1
  • Filed: 12/09/2010
  • Published: 05/09/2013
  • Est. Priority Date: 03/29/2010
  • Status: Abandoned Application
First Claim
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1. Acid gases absorption from the atmospheric air or combustion gases coming from burners and internal combustion motors that use fossil fuels, by means of a sodium hydroxide solution, characterized by following steps:

  • (a) capturing of acid gases coming from the atmospheric air and from combustion gases of burners and internal combustion motors, by means of a fan for directing them to horizontal spray absorber;

    (b) air and combustion gases supplying containing acid gases of the horizontal spray absorber in which gases run (in horizontal direction) along the equipment;

    (c) acid gases absorbing by means of a 8% NaOH solution, which is injected perpendicularly in the form of sprinkler and to the sides, at 90°

    respect to the vertical through dispersion nozzles that dissolve and react with the acid gases, producing Na2C03, Na2S03, NaNO2 and NaN03;

    (d) separating the carbonate from absorber solution, as calcium carbonate by means of the addition of lime slurry and regenerating the sodium hydroxide;

    the precipitated carbonate is washed with water and dried with hot air for marketing, which is an impalpable powder passing the mesh 325 of Taylor series;

    (e) sulfite separating by means of barium chloride addition and an oxidizing agent to precipitate it as barium sulfate and forming sodium chloride, the barium sulfate obtained is washed with water and dried with hot air, for its marketing;

    (f) nitrite and nitrate separating by means of the addition of ammonium hydroxide to react with the nitrate and an oxidizing agent to obtain only ammonium nitrate, the crystals of ammonium nitrate are washed with water and dried with hot air for its marketing;

    (g) in an industrial alternative the sodium carbonate is separated without the addition of lime slurry, characterized by the concentration, by recirculating the solution to deposit of the absorber solution up to saturation, it is passed to a heat exchanger for heating the solution to then pass it to a basket crystallizer for crystallizing Na2C03, after washing with water, drying with hot air and finally grinding to the granulometry commercially desired.

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