Comparison of oil palm shell-based activated carbons produced by microwave and conventional heating methods using zinc chloride activation

Hesas, Roozbeh Hoseinzadeh; Arami-Niya, Arash; Daud, Wan Mohd Ashri Wan; Sahu, J.N.

doi:10.1016/j.jaap.2013.08.006

Cited by 102 publications

(20 citation statements)

References 34 publications

(50 reference statements)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The removal of lignin parts were also observed by a 55.8% reduction in peak intensity at 1,594 cm −1 which is attributed to CC stretching of the aromatic rings of lignin. The carbonyl of aldehydes, ketones, and acetyl group in hydroxycinnamic acids associated with the alcoholic polysaccharides in lignin exhibit a peak at 1,718 cm −1 . The intensity of this peak decreased by 21% in HDW‐US and completely disappeared following hot alkali treatment.…”

Section: Resultsmentioning

confidence: 99%

Mechanical and thermal characterization of polyester composite containing treated wood flour from Palm oil biomass

et al. 2016

View full text Add to dashboard Cite

The effect of water and alkali treatment on the thermal decomposition of oil palm shell (OPS) together with the mechanical performance of polyester composites reinforced with treated OPS has been presented in this work. Treatment of OPS with cold/hot distilled water and cold alkali treatment were found to improve the tensile and flexural strength of the resulting composites although the highest mechanical performance was noted with the use of sonication in hot distilled water. On the other hand, hot alkali treatment was found to produce a composite mechanical performance similar to that of the hot distilled water treatment with sonication. FTIR tests indicated that adsorbed water molecules together with some parts of the hemicellulose and lignin were removed by the treatments. Thermogravimetric analysis and scanning electron microscopy of the treated OPS with hot alkali (1%–9% concentration) showed that the mechanical performance reach a peak at 7% alkali concentration with a further increase in concentration resulting in a significant lignin mass loss and decrease in mass residue of the OPS. This trend was attributed to the higher alkali concentration removing hemicellulose as a binder for the cellulose and lignin which resulted in debonding between the filler and matrix components of the OPS and hence a deterioration in fiber structure and resulting poor composite mechanical performance. Therefore, it was concluded that the optimum concentration of alkali treatment required for maximum mechanical performance of natural filler reinforced polymer composites can be obtained simply from thermogravimetric analysis. POLYM. COMPOS., 39:1200–1211, 2018. © 2016 Society of Plastics Engineers

show abstract

Section: Resultsmentioning

confidence: 99%

Mechanical and thermal characterization of polyester composite containing treated wood flour from Palm oil biomass

et al. 2016

View full text Add to dashboard Cite

show abstract

“…The nitrogen adsorption/desorption curve as shown in Figure describes a type IV curve as per the IUPAC guideline representing adsorption isotherm with hysteresis mainly associated with mesopores in the activated carbon. Though the sharp “knee” shape at the lower relative pressure suggest a considerable amount of micropores are present in the activated carbon. According to Liu et al .…”

Section: Resultsmentioning

confidence: 99%

Activated carbons prepared from Thymelaea hirsuta wood: Sustainable adsorbents for polyvinyl alcohol

Omri

Benzina

2015

Env Prog and Sustain Energy

View full text Add to dashboard Cite

In this study, activated carbon as novel adsorbent was prepared from low cost and locally available source such as Thymelaea hirsuta wood. Characterization of the adsorbent was carried out and BET surface area of the adsorbent was found to be 1496 m2/g. Subsequently, the Thymelaea hirsuta wood activated carbon (TWAC) was applied for the removal of polyvinyl alcohol from aqueous solutions. It was found that adsorption efficiency significantly depend to the level of initial solution pH and polymer concentration, metal addition, temperature, and adsorption time. Among the various conventional isotherm models, Langmuir is more suitable for analyzing the explanation data. The process of removal of polyvinyl alcohol was better governed by second order kinetics with a rate constant of 0.0079 g mg−1 min at initial concentration 20 mg/L. The calculated thermodynamic parameters indicate the entropy‐driven and endothermic nature of polymer adsorption process. For desorption study, more than 86.2% of polyvinyl alcohol could be desorbed from the adsorbent. © 2015 American Institute of Chemical Engineers Environ Prog, 35: 70–79, 2016

show abstract

“…En el espectro (a) se muestra una banda fuerte a 3250 cm -1 , correspondiente a la vibración de estiramiento del enlace hidroxilo (OH), asignado a la presencia de alcoholes y fenoles (MaldonadoHodar et al 2011, Huang et al 2015, Muhammad et al 2015. En el carbón activado sin lavar, a 2252 cm -1 se presenta una banda débil que caracteriza a la vibración tipo estiramiento del triple enlace del carbono que puede estar presente en la superficie del material (Hoseinzadeh et al 2013 residuos de K 2 CO 3 , un subproducto del proceso de activación con KOH (Toledano 1988, Huang et al 2015. Otras bandas detectadas en 703 y 669 cm -1 son indicadoras de la presencia de K 2 CO 3 en el material preparado.…”

Section: Espectroscopía Infrarroja Con Transformada De Fourierunclassified

SÍNTESIS DE CARBÓN ACTIVADO A PARTIR DE EPICARPIO DE Attalea macrolepis Y SU APLICACIÓN EN LA REMOCIÓN DE Pb2+ EN SOLUCIONES ACUOSAS

Ramos¹,

Rondón

Astudillo³

et al. 2017

Rev. Int. Contam. Ambie.

View full text Add to dashboard Cite

Palabras clave: residuo vegetal, pirólisis, isotermas, adsorción química RESUMEN En este trabajo se sintetizó carbón activado a partir del epicarpio de Attalea macrolepis y se evaluó como adsorbente para la remoción de iones Pb 2+ . El pH, la masa del adsorbente, el tiempo y la concentración inicial de plomo se evaluaron como pará-metros influyentes en el proceso de adsorción. Por otro lado, se evaluó el mecanismo de adsorción de los iones de plomo sobre el carbón activado usando los modelos de Langmuir, Freundlich y Dubinin-Radushkevich. Mediante espectroscopía infrarroja con transformada de Fourier en el material adsorbente se identificaron los grupos funcionales hidroxilos, carboxilatos, olefinas y anillos bencénicos. Por medio de microscopía electrónica de transmisión se evidenció una matriz de partículas aglomeradas heterogéneas de tamaño comprendido entre 149 a 185 nm. Las condiciones óptimas obtenidas para la remoción de 70 % de iones Pb 2+ (5 mg/L) fueron a pH 5, una masa de adsorbente de 150 mg, un tiempo de contacto de una hora, una agitación de 1500 rpm y un volumen de 25 mL. A partir de las isotermas se obtuvo una capacidad máxima de adsorción de 0.500 mg/g. La energía de adsorción calculada a partir del modelo de Dubinin-Radushkevich fue de 10.42 KJ/mol, este valor energético permite inferir que en el sistema carbón activado-iones Pb 2+ ocurre una adsorción química. Los resultados demuestran que el carbón activado producido con el epicarpio de Attalea macrolepis es un adsorbente alternativo de bajo costo y amigable con el ambiente para remover Pb 2+ de sistemas acuosos.

show abstract

Comparison of oil palm shell-based activated carbons produced by microwave and conventional heating methods using zinc chloride activation

Cited by 102 publications

References 34 publications

Mechanical and thermal characterization of polyester composite containing treated wood flour from Palm oil biomass

Mechanical and thermal characterization of polyester composite containing treated wood flour from Palm oil biomass

Activated carbons prepared from Thymelaea hirsuta wood: Sustainable adsorbents for polyvinyl alcohol

SÍNTESIS DE CARBÓN ACTIVADO A PARTIR DE EPICARPIO DE Attalea macrolepis Y SU APLICACIÓN EN LA REMOCIÓN DE Pb2+ EN SOLUCIONES ACUOSAS

Contact Info

Product

Resources

About