Influence of the experimental conditions on porosity and structure of adsorbents elaborated from Moroccan oil shale of Timahdit by chemical activation

Ichcho, S.; Khouya, El Hassane; Fakhi, S.; Ezzine, M.; Hannache, Hassan; Pallier, R; Naslain, R.

doi:10.1016/j.jhazmat.2004.10.009

Cited by 30 publications

(13 citation statements)

References 11 publications

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“…1 As regiões porosas são favoráveis ao fenômeno de sorção. 1 A eficiência da funcionalização com H 3 PO 4 no incremento da CTC, atribuído ao importante papel que o ácido fosfórico tem na catálise da desidratação e na proteção da matéria orgânica contra oxidação, como constatado por Ichcho et al 21 em estudos de ativação do XR com H 3 PO 4 , com temperaturas de 250 °C e 450 °C. Por outro lado, a ação da mistura sulfonítrica no incremento da CTC do XR foi anteriormente elucidada por Shawabkeh.…”

Section: Resultsunclassified

Effect of Chemical Activation on Surface Properties of Oil Shale by-Product

et al. 2016

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7 , NaOH, and KMnO 4 using either ultrasound (Route 1) or reflux (Route 2). The products obtained were evaluated in terms of cation exchange capacity (CEC). Structural characterization was performed using X-ray diffraction, X-ray fluorescence, and infrared spectroscopy to identify the functional groups present. The best results were achieved using Route 2 with solutions of either H 3 PO 4 or HNO 3 /H 2 SO 4 (3:1), giving CEC values of 315 and 316 mmol c kg -1 , respectively. The pyrolyzed oil shale functionalized using Route 2 (reflux) with NaOH as the activating agent showed the highest sorption of methylene blue (35.6 mg g -1 ). The main mechanisms observed for oil shale by-product functionalization were oxidation, nitration, and CaO leaching.

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Section: Resultsunclassified

Effect of Chemical Activation on Surface Properties of Oil Shale by-Product

et al. 2016

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“…Several studies have been carried out on the investigation of new precursor less expensive and do not use the forest reserves, such as peat, chitin (Ghorbel-Bellaaj et al, 2011), silica (Givianrad et al, 2013), sawdust (Johannes et al, 2013), bagasse pith and fly ash (Esfandiar et al, 2014;Reinik et al, 2015). From this point of view, the use of bituminous shale as year adsorb is of great interest because of its efficiency, their chemical composition, rich in active functions (Chen et al, 2010;Ichcho et al, 2005). The functional sites are due to the arrangement of the natural mineral component organic and within their structure (Chen et al, 2010;Oumam, 2003).…”

Section: Elaboration Of Novel Adsorbent From Moroccan Oil Shale Usingmentioning

confidence: 99%

Elaboration of novel adsorbent from Moroccan oil shale using Plackett–Burman design

Int¹

2019

Preprint

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The new adsorbents were prepared from Moroccan oil shale by chemical and physical process .In this study, experimental Plackett-Burman has been used as a screening method to study six factors for the development of materials to adsorbent basis of oil shale Moroccan. The factors have been identified by two levels, To Know temperature (°C), Processing time (min), mass ratio (m precursor/m acid), Pretreatment mixture the precursor with acid, origin of the raw material and type of the activating agent (H2SO4, H3PO4).And it was chosen as a response The maximum quantity of adsorption of the molecule of Methylene blue (Qads in mg/g) and the specific surface measure by the method bet (Sbet in m2/g), The predicted values were in agreement with the experimental values with a coefficient of determination (R2) of 0.98. The model has been validated by experiments subsequent to optimized conditions. The experimental data processing by software JMP 7 showed that the processing temperature The report of oil shale on the acid and activation time were the important effect on the maximal capacity of adsorption of methylene blue. The sample prepared at 237 °C during 215 min with pre-processing has a maximal capacity of adsorption equal to 54mg/g according to model of adsorption of Langmuir and SBET equal to 143 m2/g.

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“…Similar results were obtained by other researchers. [15,16] As a result, adjusting the IR and activation temperature could control the pore diameter of the olive-bagasse-derived activated carbons.…”

Section: Pore Characteristics Of the Activated Carbonsmentioning

confidence: 99%

Surface characterization of activated carbons obtained from olive bagasse by chemical activation

Demiral

2010

Surface & Interface Analysis

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In this study, activated carbons were prepared from olive bagasse by chemical activation using H 3 PO 4 . Chemical activation was carried out by mixing the solution of H 3 PO 4 and olive bagasse with a chemical agent/waste ratio (wt/wt) varying from 1 to 4. The carbonization treatment was performed at 400, 500, 600 and 700• C. The pore properties including surface area, pore volume, pore size distribution and average pore diameter of the activated carbons were determined by N 2 adsorption at 77 K using the Brunauer-Emmett-Teller (BET), t-plot and density functional theory (DFT) methods. The highest surface area and total pore volume of the activated carbon were 936 m 2 /gand 0.598 cm 3 /g, respectively. The pore size distribution showed that the activated carbons include both micro and mesopores. Under the experimental conditions employed, a carbonization temperature of 400• C with an impregnation ratio of 4 was found to be suitable for producing activated carbon of high surface area. Surface morphologies of the olive bagasse and the activated carbon were investigated by SEM. According to the experimental results, olive bagasse is a suitable raw material for activated carbon production.

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Influence of the experimental conditions on porosity and structure of adsorbents elaborated from Moroccan oil shale of Timahdit by chemical activation

Cited by 30 publications

References 11 publications

Effect of Chemical Activation on Surface Properties of Oil Shale by-Product

Effect of Chemical Activation on Surface Properties of Oil Shale by-Product

Elaboration of novel adsorbent from Moroccan oil shale using Plackett–Burman design

Surface characterization of activated carbons obtained from olive bagasse by chemical activation

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