HÁBITOS Y PRÁCTICAS DE CONSUMO DE TELÉFONOS CELULARES EN MÉXICO Y ESPAÑA

In this work the physicochemical properties of three structured materials: metallic, polymeric and ceramic, from Sulzer Brothers Limited brand, are studied in order to removal sour gases, by absorption process, in aqueous solution of Monoethanolamine (MEA), at 30% weight. Mechanical properties, chemical composition, morphology and corrosion resistance were determined, using different characterization techniques, such as: 1) mechanically, according to standard procedures ASTM E384-1990, 2) chemically, by the corrosion resistance in the presence of an electrochemical cell, in aqueous solution of H 2 SO 4 , 1N, by ASTM G5-1999, 3) morphologically by scanning electron microscopy technique, and 4) efficiency of separation, by the gas chromatography technique in order to determine the chemical absorption of CO 2 by MEA. The ceramic material was the hardest with 700HK value and tensile strength of 90 MPa, likewise showed resistance to corrosion of 10.28 mpy, separation efficiency of 74% CO 2 , at 10 minutes. The metallic material had a hardness of 190 HK and it was the most resistant of tension, with 831 MPa, and corrosion resistance of 780.4x10 -6 mpy, likewise promoted CO 2 separation efficiency of 90% during the evaluation. The polymeric material presented hardness of 20 HK and 35 MPa and it was not suffered surface change with electrochemical attack, with 282.4x10 -6 mpy, and separation efficiency of 88%. Therefore the polymer was the most ductile, with smooth surface and greater resistance with H 2 SO 4 . The metal material was more resistant to plastic deformation and more corrugated surface and the second resistance in the presence of acid medium in aqueous solutions. For all the above, the metallic material is recommended by its greater separation in the reduction of acid gases and the polymer due to its greater chemical resistance.