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Suryadi Ismadji - One of the best experts on this subject based on the ideXlab platform.
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activated carbon from jackfruit peel waste by h3po4 Chemical Activation pore structure and surface chemistry characterization
Chemical Engineering Journal, 2008Co-Authors: Devarly Prahas, Yoga Kartika, N Indraswati, Suryadi IsmadjiAbstract:Abstract The effects of Activation temperature and impregnation ratio on the pore structure and surface chemistry of activated carbons derived from jackfruit peel with Chemical Activation method using phosphoric acid as activating agent were studied. Activated carbons with well-developed pore sizes were produced at Activation temperatures of 450 and 550 °C. The BET surface areas and total pore volumes of the carbons produced at these temperatures are in the range of 907–1260 m 2 /g and 0.525–0.733 cm 3 /g, respectively.
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Activated carbon from jackfruit peel waste by H3PO4 Chemical Activation: Pore structure and surface chemistry characterization
Chemical Engineering Journal, 2008Co-Authors: Devarly Prahas, Yoga Kartika, N Indraswati, Suryadi IsmadjiAbstract:The effects of Activation temperature and impregnation ratio on the pore structure and surface chemistry of activated carbons derived from jackfruit peel with Chemical Activation method using phosphoric acid as activating agent were studied. Activated carbons with well-developed pore sizes were produced at Activation temperatures of 450 and 550 ??C. The BET surface areas and total pore volumes of the carbons produced at these temperatures are in the range of 907-1260 m2/g and 0.525-0.733 cm3/g, respectively. ?? 2007 Elsevier B.V. All rights reserved.
Colin E. Snape - One of the best experts on this subject based on the ideXlab platform.
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preparation of carbon dioxide adsorbents from the Chemical Activation of urea formaldehyde and melamine formaldehyde resins
Fuel, 2007Co-Authors: Trevor C Drage, S Piippo, Ana Arenillas, K M Smith, Covadonga Pevida, Colin E. SnapeAbstract:Abstract Adsorption is considered to be one of the more promising technologies for the capture of CO 2 from flue gases. In general, nitrogen enrichment is reported to be effective in enhancing the specific adsorbent–adsorbate interaction for CO 2 . Nitrogen enriched carbons were produced from urea–formaldehyde and melamine–formaldehyde resins polymerised in the presence of K 2 CO 3 as a Chemical Activation agent, with Activation undertaken over a range of temperatures. CO 2 adsorption capacity was determined to be dependent upon both textural properties and more importantly nitrogen functionality. Adsorbents capable of capturing above 8 wt.% CO 2 at 25 °C were produced from the Chemical Activation of urea–formaldehyde resin at 500 °C. Chemical Activation seems to produce more effective adsorbents than CO 2 Activation.
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Preparation of carbon dioxide adsorbents from the Chemical Activation of urea–formaldehyde and melamine–formaldehyde resins
Fuel, 2006Co-Authors: Trevor C Drage, S Piippo, Ana Arenillas, K M Smith, Covadonga Pevida, Colin E. SnapeAbstract:Abstract Adsorption is considered to be one of the more promising technologies for the capture of CO 2 from flue gases. In general, nitrogen enrichment is reported to be effective in enhancing the specific adsorbent–adsorbate interaction for CO 2 . Nitrogen enriched carbons were produced from urea–formaldehyde and melamine–formaldehyde resins polymerised in the presence of K 2 CO 3 as a Chemical Activation agent, with Activation undertaken over a range of temperatures. CO 2 adsorption capacity was determined to be dependent upon both textural properties and more importantly nitrogen functionality. Adsorbents capable of capturing above 8 wt.% CO 2 at 25 °C were produced from the Chemical Activation of urea–formaldehyde resin at 500 °C. Chemical Activation seems to produce more effective adsorbents than CO 2 Activation.
Robert Pietrzak - One of the best experts on this subject based on the ideXlab platform.
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comparison of physicoChemical and sorption properties of activated carbons prepared by physical and Chemical Activation of cherry stones
Powder Technology, 2015Co-Authors: Piotr Nowicki, Justyna Kazmierczak, Robert PietrzakAbstract:Abstract Cherry stones were used as a precursor for the preparation of activated carbons by physical and Chemical Activation with CO 2 and KOH, respectively. The effect of pyrolysis temperature (500 and 800 °C) and Activation method on the acid–base character of the surface, textural parameters as well as sorption properties of adsorbents prepared toward gas and liquid impurities was tested. Depending on the method of preparation, the final products were microporous activated carbons of surface area ranging from 361 to 1173 m 2 /g and pore volume from 0.21 to 0.74 cm 3 /g, with very diverse acid–base character of the surface. The results obtained in our study proved that a proper choice of cherry stone pyrolysis and Activation procedure can produce adsorbents with high capacity for nitrogen dioxide as well as different contaminants from the liquid phase.
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Comparison of the effects of different Chemical Activation methods on properties of carbonaceous adsorbents obtained from cherry stones
Chemical Engineering Research & Design, 2014Co-Authors: Robert Pietrzak, Piotr Nowicki, Izabela Kuszyńska, Justyna Kaźmierczak, Joanna Goscianska, Jacek PrzepiórskiAbstract:Abstract A method for obtaining activated carbons from cherry stones by Chemical Activation with NaOH is described. Carbonaceous adsorbents were obtained by two methods of Activation (physical mixing and impregnation) and two variants of thermal treatment (at a constant or increasing temperature). Cherry stones were proved to be effective cheap precursors of carbon adsorbents, characterised by large pore volume (ranging from 0.22 to 0.47 cm3/g) and good sorption abilities (iodine number from 343 to 996 mg/g). The activated carbons obtained usually have strongly microporous structure and acidic surface character. The best physicoChemical properties and adsorption properties towards iodine were found to be shown by the carbon samples obtained by physical mixing of the precursor or char with the activating agent followed by Activation at 600 °C.
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The effect of Chemical Activation method on properties of activated carbons obtained from pine cones
Central European Journal of Chemistry, 2012Co-Authors: Piotr Nowicki, Izabela Kuszyńska, Jacek Przepiórski, Robert PietrzakAbstract:A method for obtaining carbonaceous adsorbents from pine cones by Chemical Activation with NaOH is described. Activated carbons were obtained by two methods of Activation (physical mixing and impregnation) and two variants of thermal treatment. It has been shown that pine cones can be successfully used as cheap precursor of carbonaceous adsorbents of well-developed surface area, large pore volume and good sorption properties. All activated carbon samples obtained show strongly microporous structure and surface of acidic character. The best physicoChemical properties and greatest sorption capacity towards iodine were found for the carbon samples obtained by physical mixing of the precursor with the activating agent and then subjected to thermal Activation at 600°C.
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active carbons prepared by Chemical Activation of plum stones and their application in removal of no2
Journal of Hazardous Materials, 2010Co-Authors: Piotr Nowicki, Helena Wachowska, Robert PietrzakAbstract:Abstract A technology of obtaining active carbon from plum stones by Chemical Activation with KOH is described. The effect of carbonisation temperature as well as Activation procedure on the textural parameters, acid–base character of the surface and sorption properties of active carbons has been checked. The sorption properties of the activated carbons obtained were characterised by determination of nitrogen dioxide adsorption in dry and wet conditions. The final products were microporous activated carbons of well-developed surface area varying from 2174 to 3228 m 2 /g and pore volume from 1.09 to 1.61 cm 3 /g, showing different acid–base character of the surface. The results obtained in our study have proved that a suitable choice of the carbonisation and Activation procedure for plum stones can produce activated carbons with high capacity of nitrogen dioxide, reaching to 67 and 42 mg NO 2 /g in dry and wet conditions, respectively. The results of our study have also shown that the adsorption ability of carbonaceous sorbents depends both on the method of preparation as well as on the textural parameters and acid–base properties of their surface.
Devarly Prahas - One of the best experts on this subject based on the ideXlab platform.
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activated carbon from jackfruit peel waste by h3po4 Chemical Activation pore structure and surface chemistry characterization
Chemical Engineering Journal, 2008Co-Authors: Devarly Prahas, Yoga Kartika, N Indraswati, Suryadi IsmadjiAbstract:Abstract The effects of Activation temperature and impregnation ratio on the pore structure and surface chemistry of activated carbons derived from jackfruit peel with Chemical Activation method using phosphoric acid as activating agent were studied. Activated carbons with well-developed pore sizes were produced at Activation temperatures of 450 and 550 °C. The BET surface areas and total pore volumes of the carbons produced at these temperatures are in the range of 907–1260 m 2 /g and 0.525–0.733 cm 3 /g, respectively.
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Activated carbon from jackfruit peel waste by H3PO4 Chemical Activation: Pore structure and surface chemistry characterization
Chemical Engineering Journal, 2008Co-Authors: Devarly Prahas, Yoga Kartika, N Indraswati, Suryadi IsmadjiAbstract:The effects of Activation temperature and impregnation ratio on the pore structure and surface chemistry of activated carbons derived from jackfruit peel with Chemical Activation method using phosphoric acid as activating agent were studied. Activated carbons with well-developed pore sizes were produced at Activation temperatures of 450 and 550 ??C. The BET surface areas and total pore volumes of the carbons produced at these temperatures are in the range of 907-1260 m2/g and 0.525-0.733 cm3/g, respectively. ?? 2007 Elsevier B.V. All rights reserved.
V Gomezserrano - One of the best experts on this subject based on the ideXlab platform.
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preparation of activated carbon from cherry stones by Chemical Activation with zncl2
Applied Surface Science, 2006Co-Authors: Mara Olivaresmarin, C Fernandezgonzalez, A Maciasgarcia, V GomezserranoAbstract:Abstract Cherry stones (CS), an industrial product generated abundantly in the Valle del Jerte (Caceres province, Spain), were used as precursor in the preparation of activated carbon by Chemical Activation with ZnCl 2 . The influence of process variables such as the carbonisation temperature and the ZnCl 2 :CS ratio (impregnation ratio) on textural and Chemical-surface properties of the products obtained was studied. Such products were characterised texturally by adsorption of N 2 at −196 °C, mercury porosimetry and density measurements. Information on the surface functional groups and structures of the carbons was provided by FT-IR spectroscopy. Activated carbon with a high development of surface area and porosity is prepared. When using the 4:1 impregnation ratio, the specific surface area (BET) of the resultant carbon is as high as 1971 m 2 g −1 . The effect of the increase in the impregnation ratio on the porous structure of activated carbon is stronger than that of the rise in the carbonisation temperature, whereas the opposite applies to the effect on the surface functional groups and structures.
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preparation of activated carbons from chestnut wood by phosphoric acid Chemical Activation study of microporosity and fractal dimension
Materials Letters, 2005Co-Authors: V Gomezserrano, Eduardo M Cuerdacorrea, M C Fernandezgonzalez, Maria Alexandrefranco, A MaciasgarciaAbstract:Abstract Lignocellulosic materials are good precursors for the production of activated carbon. In this work, chestnut wood has been used in the preparation of activated carbon by the method of phosphoric acid-Chemical Activation. The influence of heat treatment temperature (i.e., 300, 400, 500 and 600 °C) and concentration of the solution of phosphoric acid (i.e., 1:1, 1:2 and 1:3 water/H 3 PO 4 proportions) used in the impregnation of chestnut wood on textural properties and fractal dimension has been studied. The products obtained have been characterized by N 2 adsorption at −196 °C. The activated carbons are mainly microporous products, both the micropore volume ( V mi ) and the specific surface area ( S BET ) as a rule increasing with increasing temperature and acid concentration. However, V mi and S BET decrease at 600 °C with regard to 500 °C. The micropore size distribution is similar in the products prepared at 400 and 500 °C, regardless of the acid concentration. For the carbons obtained at the other temperatures, the microporous structure is more heterogeneous for the 1:3 concentration at 300 °C and for the 1:1 and 1:2 concentrations at 600 °C. Similar trends to those shown by V mi and S BET are usually observed for the fractal dimension.