High pressure methane adsorption on microporous carbon monoliths prepared by olives stones

Djeridi, W.; Ouederni, Abdelmottaleb; Wiersum, Andrew D.; Llewellyn, Philip L.; Mir, L. El

doi:10.1016/j.matlet.2013.03.044

Cited by 34 publications

(14 citation statements)

References 16 publications

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“…Other authors proposed the preparation of ACMs by the extrusion of the impregnated material with different activating agents, in a similar way to the one proposed in this work, but also with the goal of obtaining ACM discs [30,31,32,33,34,35]. In this sense, the preparation of ACMs with well-defined channels, like those here presented, was less reported and could be considered to be very useful for different applications.…”

Section: Resultsmentioning

confidence: 85%

Acid Mesoporous Carbon Monoliths from Lignocellulosic Biomass Waste for Methanol Dehydration

et al. 2019

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Activated carbon monoliths (ACMs), with 25 cells/cm2, were prepared from the direct extrusion of Alcell, Kraft lignin and olives stones particles that were impregnated with phosphoric acid, followed by activation at 700 °C. These ACMs were used as catalysts for methanol dehydration reaction under air atmosphere. ACM that was prepared from olive stone and at impregnation ratio of 2, OS2, showed the highest catalytic activity, with a methanol conversion of 75%, a selectivity to dimethyl ether (DME) higher than 90%, and a great stability under the operating conditions studied. The results suggest that the monolithic conformation, with a density channel of 25 cells/cm2 avoid the blockage of active sites by coke deposition to a large extent. Methanol conversion for OS2 was reduced to 29% in the presence of 8%v water, at 350 °C, although the selectivity to DME remained higher than 86%. A kinetic model of methanol dehydration in the presence of air was developed, while taking into account the competitive adsorption of water. A Langmuir-Hinshelwood mechanism, whose rate-limiting step was the surface reaction between two adsorbed methanol molecules, represented the experimental data under the conditions studied very well. An activation energy value of 92 kJ/mol for methanol dehydration reaction and adsorption enthalpies for methanol and water of −12 and −35 kJ/mol, respectively, were obtained.

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Section: Resultsmentioning

confidence: 85%

Acid Mesoporous Carbon Monoliths from Lignocellulosic Biomass Waste for Methanol Dehydration

et al. 2019

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“…This may explain the formation of monoliths and their ability to maintain the monolithic shape in water. The important role of tar in monolith formation was also revealed by the fact that biomass could be converted into ACMs without using binders (Djeridi et al 2013;Nakagawa et al 2007;Vargas et al 2011). Additionally, the ash contents of the ACMs were found to be low (5.8% to 7.5%, Table 1), suggesting that the inorganic residues in the samples were in small quantities.…”

Section: Photos Of Acmsmentioning

confidence: 93%

Forming Active Carbon Monoliths from H3PO4-loaded Sawdust with Addition of Peanut Shell Char

Tian

Qiao

2014

BioResources

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Peanut shell char (PSC) was converted into active carbon monoliths (ACMs) by adding a binder that was easy to make. The conversion process involved adding the PSC into H3PO4-loaded sawdust, extruding the mixture, and finally heating the resulting monoliths for different times. The properties of the resulting ACMs were investigated using scanning electron microscopy, energy dispersive X-ray spectroscopy, Fourier transform infrared analysis, nitrogen adsorption-desorption, X-ray diffraction, and thermogravimetric analysis. The H3PO4-loaded sawdust could be used as a binder for converting powdered PSC into well-shaped ACMs without visual cracks. The resulting ACMs maintained their monolithic shape, even in water. The ACMs showed a much higher specific surface area (SSA, 850 to 915 m 2 /g) than the PSC (105 m 2 /g). The largest SSA (915 m 2 /g) was achieved by activation for 50 min. Increasing the activation time decreased the SSA and apparent density, but only slightly impacted the carbon structure. This research might lead to valueadded conversion of bio-chars.

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“…The nomenclature of each sample includes the pyrolysis temperature and the abbreviation of activated carbon pellets (ACP): for example the activated carbon pellet carbonized at 410 C will be denoted ACP410. The preparation of the first series was described in detail in our previous work [34]. The synthesis of the second series of porous carbon has been done in three steps according to El Mir et al protocol [35].…”

Section: Sample Preparationmentioning

confidence: 99%

“…A diagram of the high-throughput adsorption apparatus is presented in our previous work [34], it was used to determine adsorption gas capacities with a good uncertainties of about 3% [37].…”

Section: Ch 4 Sorption Experimentsmentioning

confidence: 99%

Influence of the raw material and nickel oxide on the CH4 capture capacity behaviors of microporous carbon

Djeridi

Mansour

Ouederni

et al. 2015

International Journal of Hydrogen Energy

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High pressure methane adsorption on microporous carbon monoliths prepared by olives stones

Cited by 34 publications

References 16 publications

Acid Mesoporous Carbon Monoliths from Lignocellulosic Biomass Waste for Methanol Dehydration

Acid Mesoporous Carbon Monoliths from Lignocellulosic Biomass Waste for Methanol Dehydration

Forming Active Carbon Monoliths from H3PO4-loaded Sawdust with Addition of Peanut Shell Char

Influence of the raw material and nickel oxide on the CH4 capture capacity behaviors of microporous carbon

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