Porosity of activated carbons prepared from different lignocellulosic materials

González, Juan Carlos; González, M.T.; Molina‐Sabio, M.; Rodriguez-Reinoso, F.; Sepúlveda-Escribano, A.

doi:10.1016/0008-6223(95)91246-4

Cited by 56 publications

(19 citation statements)

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“…Both surface area and micropore volume were substantially increased for this sample (nearly two-fold), although packing density slightly decrease. A typical chemical composition of lignocellulosic materials could be taken as 48% C, 6% H and 45% O (González et al 1995). In the chemical activation process, the reagents act as a dehydrating agent in which H and O are removed.…”

Section: Resultsmentioning

confidence: 99%

Adsorption of methane in activated carbons obtained from coconut shells using H3PO4 chemical activation

et al. 2009

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Activated carbon samples from coconut shells (Brazilian coconut species "Coco da Baía") were prepared by chemical activation with phosphoric acid as the activating agent. Samples were characterized by nitrogen adsorption isotherms at 77 K. Some samples were randomly chosen in order to perform methane adsorption experiments under pressures between 1 and 60 bar at 303 K. A close relationship between surface area, micropore volume and methane adsorption capacity for carbons prepared from the same starting material was observed. The highest methane storage capacity in the tested samples was found to be 95 v/v at 303 K and 35 bar, which is comparable to results obtained for commercial samples indicated for this application. A moderate concentration of phosphoric acid (around 35%) seems to favor high surface areas, micropore volumes and, hence, gas storage capacity. The inclusion of an acid wash step before carbonization and the use of inert gas flow during carbonization also seem to enhance the development of porosity. This result suggests that activated carbons prepared from "Coco da Baía" by chemical activation with phosphoric acid have potential to be used as a storage media for natural gas.

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Section: Resultsmentioning

confidence: 99%

Adsorption of methane in activated carbons obtained from coconut shells using H3PO4 chemical activation

et al. 2009

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“…The main applications are gas-phase vapour recovery in gasoline cars, retention of industrial gases that are toxic pollutants or cause odours, air conditioning systems, gas masks, and catalyst support, etc. [3,4].…”

Section: Introductionmentioning

confidence: 99%

Calorimetric study of activated carbons impregnated with CaCl₂

2015

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Activated carbon monoliths with different surface characteristics were prepared by impregnating oil palm stone with diluted aqueous CaCl 2 solutions (with concentrations between 2 and 7% w/v) without binders. The solids were characterized by determination of nitrogen adsorption isotherms at 77 K and carbon dioxide adsorption isotherms at 273 K using volumetric adsorption equipment. Surface area and micropore volume values were calculated from the nitrogen isotherms using the BET and DR models, respectively, obtaining solids with low percentages of mesoporosity. Immersion enthalpies of the activated carbon monoliths were determined in benzene, with values between -173 and -104 J g -1 , and water, with values between 61 and 30 J g -1 , indicating that the monoliths have a hydrophobic character.

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“…Activated carbon, which is sometimes called activated charcoal or active carbon, is a porous, amorphous solid carbon material, which is derived mainly from carbonaceous material, such as coal [41] (bituminous, lignite) or plant based (lignocellulosic) material [42][43][44][45][46][47][48][49][50][51][52][53][54][55][56][57][58] such as peat, wood, or nutshells (i.e. coconut, oil palm shells).…”

Section: Activated Carbonmentioning

confidence: 99%

Preparation of titanium dioxide photocatalyst loaded onto activated carbon support using chemical vapor deposition: A review paper

Puma

Bono

Krishnaiah

et al. 2008

Journal of Hazardous Materials

398

172

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Various methods to prepare and characterize TiO(2) photocatalyst loaded onto activated carbon (AC) support have been developed over the last decade. This photocatalyst has been used in a variety of investigations, i.e. from water decontamination to direct pollutant degradation in aqueous and gas phase systems using UV irradiation and lately with the assistance of ultrasonic sound waves. Chemical vapor deposition (CVD) method is one of the most promising and well-researched methods for deposition of catalysts onto supports. Given its advantage, from an engineering and fundamental aspect, CVD method also has commercial applications. A detailed search of published reports of these investigations was carried out and analyzed in this paper with focus on CVD techniques, activated carbon support and sonication.

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Porosity of activated carbons prepared from different lignocellulosic materials

Cited by 56 publications

References 4 publications

Adsorption of methane in activated carbons obtained from coconut shells using H3PO4 chemical activation

Adsorption of methane in activated carbons obtained from coconut shells using H3PO4 chemical activation

Calorimetric study of activated carbons impregnated with CaCl₂

Preparation of titanium dioxide photocatalyst loaded onto activated carbon support using chemical vapor deposition: A review paper

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Porosity of activated carbons prepared from different lignocellulosic materials

Cited by 56 publications

References 4 publications

Adsorption of methane in activated carbons obtained from coconut shells using H3PO4 chemical activation

Adsorption of methane in activated carbons obtained from coconut shells using H3PO4 chemical activation

Calorimetric study of activated carbons impregnated with CaCl2

Preparation of titanium dioxide photocatalyst loaded onto activated carbon support using chemical vapor deposition: A review paper

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Calorimetric study of activated carbons impregnated with CaCl₂