Activated carbons from waste biomass: An alternative use for biodiesel production solid residues

Nunes, Álvaro Cantini; Franca, Adriana S.; Oliveira, Leandro S.

doi:10.1016/j.biortech.2008.09.032

Cited by 135 publications

(71 citation statements)

References 31 publications

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“…With regard to concerns about recycling and utilization of agricultural biomass resources [16], the effective uses of agricultural waste biomass for the production of activated carbons by thermo-chemical conversion has gained much attention over the last decade [17]. Jatropha curcas fruit shell (JS) is a promising biomass waste that can be utilized as a precursor for activated carbon.…”

Section: Introductionmentioning

confidence: 99%

Continuous Process for Biodiesel Production in Packed Bed Reactor from Waste Frying Oil Using Potassium Hydroxide Supported on Jatropha curcas Fruit Shell as Solid Catalyst

et al. 2012

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Abstract:The transesterification of waste frying oil (WFO) with methanol in the presence of potassium hydroxide catalyst supported on Jatropha curcas fruit shell activated carbon (KOH/JS) was studied. The catalyst systems were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and the Brunauer-Emmett-Teller (BET) method. The effects of reaction variables such as residence time, reaction temperature, methanol/oil molar ratio and catalyst bed height in packed bed reactor (PBR) on the yield of biodiesel were investigated. SEM images showed that KOH was well distributed on the catalyst support. The optimum conditions for achieving the conversion yield of 86.7% consisted of a residence time of 2 h, reaction temperature of 60 °C, methanol/oil molar ratio of 16 and catalyst bed height of 250 mm. KOH/JS could be used repeatedly five times without any activation treatment, and no significant activity loss was observed. The results confirmed that KOH/JS catalyst had a great potential to be used for industrial application in the transesterification of WFO. The fuel properties of biodiesel were also determined.

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Section: Introductionmentioning

confidence: 99%

Continuous Process for Biodiesel Production in Packed Bed Reactor from Waste Frying Oil Using Potassium Hydroxide Supported on Jatropha curcas Fruit Shell as Solid Catalyst

et al. 2012

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“…(R 2 =0.997) value, Langmuir isotherm (R 2 =0.976) and dimensionless separation factor (RL=0.0791), value which has been found to be fraction in the range of 0-1, indicate the favourability of the Langmuir isotherm than the Freundlich isotherm. [29][30] , and the Dubinin-Radushkevich mean free energy E = 1/2 , 31 was found to be E=2.3570 KJ/mol calculated for the leaves and bark powder and ashes of HY and TC. As the E < 8 kJ/mol, representing 'physical adsorption 32 upholding the chemical adsorptions and ion exchange etc.…”

Section: Adsorption Isothermsmentioning

confidence: 96%

Methyl Red Dye Removal Using New Bio-Sorbents Derived From hyacinth and Tinospora Cordifolia plants From Waste Waters

2017

Rasayan J Chem

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The use of eco-friendly, highly efficient, locally available, and low-cost adsorbents have been investigated for removing dyes from waste water and regarded as an ideal alternative to the current expensive methods. Adsorption of methyl red from aqueous solution using dried Hyacinth and Tinospora Cordifolia is the objective of this study. It was focusing on the effect of decolourisation due to dosage of adsorbent, initial concentration of solution, pH, contact time and the equilibrium of adsorption was modelled by different parameters. Prime pH value for dye adsorption was found to be 4.In the removal of the dye than raw bio-materials, ashes of the bio-materials are more effective. Percentage of extraction is effected in presence fivefold excess of anions. Trivalent anion, divalent, monovalent is the order of the interference. Co-cations have showed less interference. The developed methodologies are enact to industrial samples.

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“…After carbonization samples were cooled down and submitted to the characterization tests described as follows. The carbonization procedure was based on preliminary tests and also on literature data for the production of adsorbents using coffee beans pressed cake as precursor material [8].…”

Section: Preparation Of the Carbon From Raphanus Sativus (L Var)mentioning

confidence: 99%

Characterization of an absorbent based onRaphanus sativus(L. var.), a solid residue from biodiesel production, for the removal of methylene blue

LÁzaro

Caldeira

Dantas

et al. 2010

WIT Transactions on Ecology and the Environment

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In this study, an adsorbent produced from Raphanus sativus (L. var.), a residue from the biodiesel industry, was investigated for the removal of methylene blue (MB) from textile effluents aiming to: (i) obtain physical and textural characteristics of the given carbon, and (ii) understand the MB adsorption mechanism onto such carbonaceous structures. The following methods were employed: SEM-EDS microscopy, gas adsorption and Raman spectroscopy. Physical and textural characteristics of the carbon obtained by classical methodologies such as BET, BJH and SEM analyses were corroborated by the Raman analysis. For the experimental conditions used on the preparation of the activated carbon of Raphanus sativus, the main physical parameters measured were specific surface area (236.3 m 2 .g -1 ), total pore volume (0.06 cm 3 .g -1 ) and average pore size (1.4 nm). SEM and Raman analysis revealed that a microporous structure of carbon was obtained as the ratio between the disorder band and the graphite band was higher than unity, thus indicating that MB adsorption may occur predominantly at the surface of the adsorbent, given that the diameter of MB molecule was estimated to be nearly 1.5 nm. Raman analysis of solid MB revealed that MB molecules are predominantly found as dimmers in the solid however they are adsorbed as monomer in the Raphanus sativus carbon. MB through the central nitrogen atom of its molecule; MB bonding through sulfur atom may also occur but at lesser intensity while MB bonding through amino nitrogen atom does not seem probable.

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Activated carbons from waste biomass: An alternative use for biodiesel production solid residues

Cited by 135 publications

References 31 publications

Continuous Process for Biodiesel Production in Packed Bed Reactor from Waste Frying Oil Using Potassium Hydroxide Supported on Jatropha curcas Fruit Shell as Solid Catalyst

Continuous Process for Biodiesel Production in Packed Bed Reactor from Waste Frying Oil Using Potassium Hydroxide Supported on Jatropha curcas Fruit Shell as Solid Catalyst

Methyl Red Dye Removal Using New Bio-Sorbents Derived From hyacinth and Tinospora Cordifolia plants From Waste Waters

Characterization of an absorbent based onRaphanus sativus(L. var.), a solid residue from biodiesel production, for the removal of methylene blue

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