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handle: 10261/102706
[ES] Neumáticos usados fueron valorizados por medio del tratamiento termoquímico de pirólisis usando una instalación a escala piloto de 150 kWth de capacidad nominal. Más de 500 kg de neumáticos fueron pirolizados en un reactor continuo de tipo tornillo a 550ºC. La fracción sólida producida, llamada aquí negro de carbón pirolítico (NCP), fue caracterizado en términos de análisis próximo y elemental, área BET y porosimetría de Hg. Asimismo, el NCP fue sometido a diferentes tratamientos de acidificación/basificación con el fin de obtener un sólido carbonoso con propiedades similares a los negros de carbono (NC) comerciales. Se observó que estos tratamientos disminuyen la concentración de compuestos inorgánicos sin detrimento de las propiedades texturales. Así, mediante el uso de reactivos comerciales y baratos, usuales en la industria química, el contenido de cenizas del NCP fue reducido en un 80%, pasando del 14.9 al 3% (en peso) y presentó propiedades similares a los NC comerciales de la serie N300.
[EN] Waste tires have been valorized by pyrolysis using a pilot scale facility with a nominal capacity of 150 kWth. More than 500 kg of shredded waste tires were pyrolyzed at 550 ºC using a continuous auger reactor. The char fraction produced, herein named pyrolytic carbon black (CBp) was characterized and submitted to different acidification/basification treatments in order to obtain similar properties to those of commercial carbon blacks. Elemental and proximate analyses, surface area and Hg porosimetry were used to investigate the properties of the CBp. It was observed that these treatments decreased the concentration of inorganic compounds without detriment of the textural properties. The ash content decreased from 14.9 wt% up to 3.0 wt.%, by using commercial and cheap reagents used in the chemical industry. The CBp was compared with those of commercial carbon blacks of the N300 series.
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