CARACTERIZACIÓN TEXTURAL Y QUÍMICA DE CARBONES ACTIVADOS PREPARADOS A PARTIR DE CUESCO DE PALMA AFRICANA (ELAEIS GUINEENSIS) POR ACTIVACIÓN QUÍMICA CON CaCl2 y MgCl2

Acevedo, Sergio; Giraldo, Liliana; Moreno, Juan Carlos

doi:10.15446/rev.colomb.quim.v44n3.55606

Cited by 5 publications

(9 citation statements)

References 19 publications

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“…The materials obtained have characteristics that are consistent with other materials prepared from lignocellulosic residues. 14 , 28 , 30 It is observed that the humidity percentage for most materials is between 8.2 and 28.4%. This is associated with the amount of water molecules that the material can retain when it is in contact with the environment.…”

Section: Resultsmentioning

confidence: 99%

“… 31 About the percentage of ash, it is observed that the values are not high for any of the carbons obtained, comparing the results with those of other lignocellulosic precursors where ash levels are up to 26%. 14 , 32 There is also evidence for an increase in the ash content in the activated carbons, which may be related to the functionalization process, because the agent did not react with the surface of the carbons, contributing to the inorganic matter content ( Table 1 ). 31 On the other hand, the fixed carbon content in all the materials was higher than the values reported for the precursor.…”

Section: Resultsmentioning

confidence: 99%

“…For all prepared samples, the impregnation of the mango seed was carried out at a ratio of 2 mL of solution/1 g of the precursor. 14 For the impregnation of the precursor, two activating agents were used: sulfuric acid (15% v/v) and calcium chloride (7% w/v). The mango seed mixture was impregnated with the said solutions for 48 h at a temperature of 358 K.…”

Section: Methodsmentioning

confidence: 99%

“…The surface chemistry of activated carbons can be very diverse depending on the activating agent used in the preparation process . Because of their structure, on the surface of activated carbons we can find different oxygenated chemical groups such as carboxylic acids, lactones, phenols, ethers, carbonyls, or pyrones, additionally, it is also possible to find heteroatoms in the basal planes of their structure such as nitrogen, phosphorus, chlorine or sulfur, and delocalized π electrons. − …”

Section: Introductionmentioning

confidence: 99%

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Study of Mercury [Hg(II)] Adsorption from Aqueous Solution on Functionalized Activated Carbon

et al. 2021

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Mercury and its compounds are toxic substances, whose uncontrolled presence in the environment represents a danger to ecosystems and the organisms that inhabit in it. For this reason, in this work, we carried out a study of mercury [Hg(II)] adsorption from aqueous solution on functionalized activated carbon. The activated carbons were prepared by chemical activation of a mango seed with solutions of CaCl 2 and H 2 SO 4 at different concentrations, later, the carbonaceous materials were functionalized with Na 2 S, with the aim of increasing the sulfur content in the carbonaceous matrix and its affinity to mercury. The materials were characterized using: proximal analysis, scanning electron microscopy, Boehm titrations, point zero charge (pH PZC ), and infrared spectroscopy. Additionally, immersion calorimetries were performed in the mercury solution. The results of textural and chemical characterization show materials with low Brunauer–Emmett–Teller (BET) surface areas between 2 and 33 m 2 ·g –1 and low pore volumes. However, they had a rich surface chemistry of oxygenated groups. The enthalpies of immersion in the mercury solutions are between −31.71 and −77.31 J·g –1 , showing a correlation between the magnitude of the enthalpic data and the adsorption capacity of the materials. It was evidenced that the functionalization process produces a decrease in the surface area and pore volume of the activated carbons, and an increase in the sulfur content of the carbonaceous matrix. It was evidenced that the functionalization process generated an increase in the mercury [Hg(II)] adsorption capacity between 21 and 49% compared to those of the nonfunctionalized materials, reaching a maximum adsorption capacity of 85.6 mgHg 2+ g –1 .

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Study of Mercury [Hg(II)] Adsorption from Aqueous Solution on Functionalized Activated Carbon

et al. 2021

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“…En Colombia, los sub-productos de la palma de aceite se utilizan solo parcialmente; la fibra y el cuesco se utilizan para generar vapor de agua para el proceso[26].Malasia siendo uno de los mayores productores de palma de aceite, está reforzando su producción con el aumento de la demanda mundial de aceite comestible, biodiesel y oleoquimicos derivados del aceite de palma[27]. Por cada kg de aceite de palma extraído, aproximadamente 4 kg de biomasa seca generada, de los cuales un tercio se encuentra en los subproductos derivados del racimo de fruta fresca (FFB), la cáscara de la palma (PKS) y el mesocarpio Fibra (MF), (vease la Figura 2) y los otros dos tercios está representado por la palma de aceite Tronco (OPT) y fronda de palma aceitera (OPF) dentro de las plantaciones[28,29].Una de las principales características de un biocombustible sólido es su poder calorífico, tanto superior como inferior. El poder calorífico superior (PCS) se define como la energía liberada cuando una masa unitaria de biocombustible se quema con oxígeno en una bomba calorimétrica en condiciones normalizadas[30].…”

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Análisis de residuos sólidos de palma africana, como alternativa de aprovechamiento de energías renovables en el departamento del Cesar

Pérez

López

2019

Ing.USBMed

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La demanda actual energética y los costos en energía van incrementando; la contaminación da necesidad a la utilización de energías limpias que impacten en menor medida el medio ambiente. Colombia al encontrarse ubicado en zona rica con climas, biodiversidad y ecosistemas variados, cuenta con gran potencial de energías renovables del aire, agua, sol y biomasa de residuos sólidos como los de palma de africana; hoy en día el 70% de energía se produce de hidroeléctricas y solo el 2% del país genera energías renovables. A pesar que Colombia es un país con gran potencial de biomasa y residuos agroindustriales no se aprovecha su potencial como materia prima en procesos alternos de conversión de energía tales como los procesos termoquímicos. Así mismo el departamento de Cesar cuenta con un potencial de 1.935,51 (TJ/Año) y una generación de residuos anuales de 209.759,99 Ton de Biomasa residual, con un potencial energético de biomasa disponible para su aprovechamiento. De esta manera, es posible establecer por medio de los resultados de investigación el uso de estos residuos en aplicaciones térmicas que conlleven a la generación de energía limpias en la región y el país.

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Biochar‐MgO from Soursop Seeds in the Production of Biofuel Additive Intermediates

Palermo,

Camargo López,

Brijaldo

et al. 2023

ChemPlusChem

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The conversion of residual biomass from fruit seeds into biochar can be achieved using MgCl2 as an activating agent and calcining at 700 °C. The resulting MgO‐biochars were employed in the aldol condensation reaction between furfural and acetone. This reaction is essential as the first step in the obtention of biofuels derived from biomass. The biochars were characterized through various physicochemical techniques, revealing that the presence of MgO nanoparticles deposited on the carbon surface modifies the structural and acidic‐basic properties of the carbonaceous materials with a graphitic structure. The biochar with a surface content of MgO of 0.34 % w/w enables the achievement of 100 % of selectivity towards 4‐(2‐furanyl)‐3‐buten‐2‐one (I) with quantitative conversions under optimized conditions. This property highlights the potential of using this type of biochar, commonly used for CO2 capture, as a versatile acidic‐basic catalyst, thereby introducing a novel approach to sustainable chemistry.

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CARACTERIZACIÓN TEXTURAL Y QUÍMICA DE CARBONES ACTIVADOS PREPARADOS A PARTIR DE CUESCO DE PALMA AFRICANA (ELAEIS GUINEENSIS) POR ACTIVACIÓN QUÍMICA CON CaCl2 y MgCl2

Cited by 5 publications

References 19 publications

Study of Mercury [Hg(II)] Adsorption from Aqueous Solution on Functionalized Activated Carbon

Study of Mercury [Hg(II)] Adsorption from Aqueous Solution on Functionalized Activated Carbon

Análisis de residuos sólidos de palma africana, como alternativa de aprovechamiento de energías renovables en el departamento del Cesar

Biochar‐MgO from Soursop Seeds in the Production of Biofuel Additive Intermediates

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