The evolution of the pore structure of coconut shells during the preparation of coconut shell-based activated carbons

Achaw, Osei-Wusu; Afrane, George

doi:10.1016/j.micromeso.2007.10.001

Cited by 83 publications

(32 citation statements)

References 12 publications

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“…A similar observation on the pore structure and transformations following combustion was made by Achaw et al 59) implying that the cell structure was lost after devolatilization. The changes in the original structure of the matrix of the raw material may be attributed to the cross-linking of reactive points of the cylinders brought about by the disruption of the original polymeric structure of the precursor material (i.e.…”

Section: Effect Of Physical Propertiessupporting

confidence: 76%

Structural Transformation of Agricultural Waste/Coke Blends and Their Implications during High Temperature Processes

et al. 2011

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With a sharp increase in demand and production, palm oil wastes, (i.e. empty fruit bunches, fibre and shells) are generated, out of which a large amount ends up in landfill. In such a context, alternative solutions are needed to reduce the impact of these agricultural wastes on the environment. The present paper investigates the effect of addition of agricultural waste materials on the combustion behavior of its blends with metallurgical coke (MC). Two types of agricultural waste materials, palm shell and coconut shell, were mixed in different proportion with MC, while the gas phase reactions were studied at 1 200°C in a drop tube furnace (DTF). In the tested conditions, the blends containing agricultural waste materials indicated higher combustion efficiencies compared to MC alone. Carbon structure analysis were performed through 13 CP/MAS NMR spectroscopy showing various groups of carbons present in the agricultural waste samples ranging from aliphatic to aromatic carbons. The morphology of the samples was studied through Scanning Electron Microscope (SEM). SEM provided a qualitative description of the pore structure in the raw samples as well as the changes occurring following the gas phase reactions in the DTF. It was found that the particles derived from the wastes became increasingly deformed and lost their cell lumen. Surface area measurements were found to be in good agreement with the SEM images, supporting the higher combustion efficiency of the blends in comparison to coke alone. The present study suggests that agricultural waste materials have the potential to partially replace MC, as an auxiliary fuel in metallurgical processes.

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Section: Effect Of Physical Propertiessupporting

confidence: 76%

Structural Transformation of Agricultural Waste/Coke Blends and Their Implications during High Temperature Processes

et al. 2011

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“…Figures 1-3, indicating that the nature of pores seen of activated carbons depend on the sections used. Crucially, the nature of porosity observed in Figure 6 is totally different from any description of porosity previously described except in the work of Achaw and Afrane (2008). What is observed here is a network of cracks which are more the result of thermal stress on the carbon matrix.…”

Section: Characterization Of Activated Carbons With the Scanning Eleccontrasting

confidence: 65%

A Study of the Porosity of Activated Carbons Using the Scanning Electron Microscope

Achaw¹

2012

Scanning Electron Microscopy

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“…The charcoal can be activated physically by using by varying argon gas pressure, activation time and temperature. It showed that the pores of charcoal were distributed uniformly and the pores size reduced as the physical activation parameters were increased [6,7]. The chemical activation was performed by emmersing the charcoal into chemical solution so that the solution penetrate deep into the carbon charcoal structure to develop the pores [8,9].…”

Section: Introductionmentioning

confidence: 99%

Activated coconut shell charcoal carbon using chemical-physical activation

Budi

Umiatin

Nasbey

et al. 2016

AIP Conference Proceedings

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The evolution of the pore structure of coconut shells during the preparation of coconut shell-based activated carbons

Cited by 83 publications

References 12 publications

Structural Transformation of Agricultural Waste/Coke Blends and Their Implications during High Temperature Processes

Structural Transformation of Agricultural Waste/Coke Blends and Their Implications during High Temperature Processes

A Study of the Porosity of Activated Carbons Using the Scanning Electron Microscope

Activated coconut shell charcoal carbon using chemical-physical activation

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