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Experimental design to optimize the preparation of activated carbons from herb residues by vacuum and traditional ZnCl2 chemical activation / Juan Yang in Industrial & engineering chemistry research, Vol. 50 N° 7 (Avril 2011) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 50 N° 7 (Avril 2011) . - pp. 4057–4064 Titre : Experimental design to optimize the preparation of activated carbons from herb residues by vacuum and traditional ZnCl2 chemical activation Type de document : texte imprimé Auteurs : Juan Yang, Auteur ; Keqiang Qiu, Auteur Année de publication : 2011 Article en page(s) : pp. 4057–4064 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Carbons  Chemical  activation Résumé : Doehlert matrix was used to optimize the experimental conditions for the preparation of activated carbons from herb residues by vacuum chemical activation and traditional chemical activation using ZnCl2 as activation agent. The effects of activation temperature and impregnation ratio, the most influential factors of ZnCl2 chemical activation, were studied. The obtained activated carbons were characterized by total yield and methylene blue and iodine adsorption value. Each response has been described by a second-order model, and the predicted model presented a good agreement with experimental data. The results showed that activated carbons prepared by vacuum chemical activation have higher yield and better adsorption capacity. The removal percentages of methylene blue for the two optimal activated carbons and a commercial activated carbon were determined. The activated carbon prepared by vacuum chemical activation exhibited the highest methylene blue removal efficiency. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie101531p [article] Experimental design to optimize the preparation of activated carbons from herb residues by vacuum and traditional ZnCl2 chemical activation [texte imprimé] / Juan Yang, Auteur ; Keqiang Qiu, Auteur . - 2011 . - pp. 4057–4064. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 50 N° 7 (Avril 2011) . - pp. 4057–4064 Mots-clés : Carbons  Chemical  activation Résumé : Doehlert matrix was used to optimize the experimental conditions for the preparation of activated carbons from herb residues by vacuum chemical activation and traditional chemical activation using ZnCl2 as activation agent. The effects of activation temperature and impregnation ratio, the most influential factors of ZnCl2 chemical activation, were studied. The obtained activated carbons were characterized by total yield and methylene blue and iodine adsorption value. Each response has been described by a second-order model, and the predicted model presented a good agreement with experimental data. The results showed that activated carbons prepared by vacuum chemical activation have higher yield and better adsorption capacity. The removal percentages of methylene blue for the two optimal activated carbons and a commercial activated carbon were determined. The activated carbon prepared by vacuum chemical activation exhibited the highest methylene blue removal efficiency. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie101531p

Upgrading ash - rich activated carbon from distilled spirit lees / Juan Yang in Industrial & engineering chemistry research, Vol. 51 N° 17 (Mai 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 17 (Mai 2012) . - pp. 6037–6043 Titre : Upgrading ash - rich activated carbon from distilled spirit lees Type de document : texte imprimé Auteurs : Juan Yang, Auteur ; Jian Yu, Auteur ; Wei Zhao, Auteur Année de publication : 2012 Article en page(s) : pp. 6037–6043 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : steam  activated  carbon Résumé : Activated carbon (AC) was prepared from ash-rich distilled spirit lees via carbonization and successive activation incorporated with different deashing methods. The results show that the alkali treatment of the steam-activated carbon (ATAC) produced the AC with the highest performance in comparison with the NaOH activation and direct alkali treatment of the carbonized carbon (ATCC). The ATAC removed 84.4% of the ash from steam-activated carbon and increased the BET surface area and total pore volume by 92.3% and 109.3%, respectively, resulting in the AC with its ash content of 11 wt %, BET surface area of 620 m2/g, and total pore volume of 0.67 cm3/g. The article also revealed that it is possible to use the alkaline leaching solution from the ATAC, which is mainly composed of sodium silicate, as the major binder to mold the produced powder AC. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie202882r [article] Upgrading ash - rich activated carbon from distilled spirit lees [texte imprimé] / Juan Yang, Auteur ; Jian Yu, Auteur ; Wei Zhao, Auteur . - 2012 . - pp. 6037–6043. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 17 (Mai 2012) . - pp. 6037–6043 Mots-clés : steam  activated  carbon Résumé : Activated carbon (AC) was prepared from ash-rich distilled spirit lees via carbonization and successive activation incorporated with different deashing methods. The results show that the alkali treatment of the steam-activated carbon (ATAC) produced the AC with the highest performance in comparison with the NaOH activation and direct alkali treatment of the carbonized carbon (ATCC). The ATAC removed 84.4% of the ash from steam-activated carbon and increased the BET surface area and total pore volume by 92.3% and 109.3%, respectively, resulting in the AC with its ash content of 11 wt %, BET surface area of 620 m2/g, and total pore volume of 0.67 cm3/g. The article also revealed that it is possible to use the alkaline leaching solution from the ATAC, which is mainly composed of sodium silicate, as the major binder to mold the produced powder AC. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie202882r