Resumen del producto

El artículo "Adsorción de CO2 en biochar obtenido de semillas de guanábana (Anonna muricata) mediante activación química con sales metálicas" investiga la producción y caracterización de biochar a partir de semillas de guanábana para la captura de dióxido de carbono (CO2). Utilizando un proceso de pirólisis y activación química con cloruros de calcio y magnesio, se obtuvieron biochars con áreas superficiales que oscilaron entre 26 y 220 m²/g. El estudio evaluó el impacto del proceso de desengrasado en la capacidad de adsorción, encontrando que el biochar activado con CaCl2 mostró la mejor capacidad para adsorber CO2. Los modelos de isoterma como Langmuir, Freundlich y Redlich-Peterson se ajustaron bien a los datos experimentales, siendo el modelo Redlich-Peterson el que presentó los mejores resultados. Este trabajo destaca el potencial de las semillas de guanábana como precursor para producir biochar eficaz en la mitigación del CO2, contribuyendo así a estrategias de remediación ambiental.

Abstract del producto

Environment remediation is one of the primary goals of sustainable development and anthropogenic activities, and the 
use of fuels in various industrial processes through combustion has led to an increase in CO2 as well as big damage to the 
atmosphere by the greenhouse efect. Biochar has been used for the capture of carbon dioxide due to its high surface area. 
In this study, we obtained biochar from soursop seeds. The materials were synthesized by pyrolysis of precursor materials 
and chemical activation with chlorides of Ca and Mg at a concentration of 5% w/v. The efect of the defatting process of the 
soursop seeds on the obtained carbon was also researched. The absorbed solids were characterized through thermogravimetric 
analysis, X-ray difraction, and CO2 adsorption, followed by infrared spectroscopy, N2-physisorption, CO2-physisorption, 
CO2, XPS, DRIFTS and TPD of NH3. The type of activating agent and pretreatment conditions used were more favorable 
than the defatted process at obtaining carbons with N2 surface areas between 26 and 220 m2
g−1. The biochars were analyzed  by CO2 surface area to describe the microporous framework, and the solid with the best CO2 surface area was the one with 
the highest CO2 adsorption. According to the statistical analyses conducted, the evaluated models Langmuir, Freundlich, 
and Redlich-Peterson presented good fts to the experimental data. However, the Redlich-Peterson model showed the lowest 
values for the residual variance, which were of the order of 0.001 or less in all cases based on the CO2 adsorption isotherms 
on the studied activated carbons. However, the carbons obtained by defatting showed favorable hydrophilic behavior along 
with adsorption capacities in the bioremediation process and afnity towards of this GHG.

Palabras clave

Biocarbón · Semillas de guanábana · Remediación ambiental · Activación química · Dióxido de carbono