Documents disponibles écrits par cet auteur

Anion effect on Cu2+ adsorption on NH2-MCM-41 / Koon Fung Lam in Industrial & engineering chemistry research, Vol. 47 N° 23 (Décembre 2008) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 47 N° 23 (Décembre 2008) . - p. 9376–9383 Titre : Anion effect on Cu2+ adsorption on NH2-MCM-41 Type de document : texte imprimé Auteurs : Koon Fung Lam, Auteur ; Xinqing Chen, Auteur ; Gordon McKay, Auteur Année de publication : 2009 Article en page(s) : p. 9376–9383 Note générale : Chemistry engineering Langues : Anglais (eng) Mots-clés : Anion  affect  Cu2+  adsorption  NH2-MCM-41 Résumé : The anion effect was investigated for the copper adsorption on NH2-MCM-41 from Cu(NO3)2 and CuSO4 solutions. The copper adsorption was higher and faster in the presence of SO42− anion compared to NO3−. The MCM-41 possesses well-ordered mesopores that are readily accessible and a uniform surface that is amenable to the attachment of the chemical moieties for creating tailored adsorption sites. The adsorption sites on NH2-MCM-41 were created by grafting aminopropyls on MCM-41, and the random deposition resulted in a site distribution best described by the Freundlich equation. The majority of the adsorption sites (i.e., up to 70%) are readily accessible to Cu2+ adsorption. The remaining sites were only accessible in the presence of SO42−. Evidence showed that the SO42− anion affects the adsorption by interacting with the dissolved copper to form [CuSO4]0 species, coadsorbing with Cu2+ to form stable complexes, and may even indirectly react with the weakly acidic silanol groups to liberate aminopropyls for more Cu2+ adsorption. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie701748b [article] Anion effect on Cu2+ adsorption on NH2-MCM-41 [texte imprimé] / Koon Fung Lam, Auteur ; Xinqing Chen, Auteur ; Gordon McKay, Auteur . - 2009 . - p. 9376–9383. Chemistry engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 47 N° 23 (Décembre 2008) . - p. 9376–9383 Mots-clés : Anion  affect  Cu2+  adsorption  NH2-MCM-41 Résumé : The anion effect was investigated for the copper adsorption on NH2-MCM-41 from Cu(NO3)2 and CuSO4 solutions. The copper adsorption was higher and faster in the presence of SO42− anion compared to NO3−. The MCM-41 possesses well-ordered mesopores that are readily accessible and a uniform surface that is amenable to the attachment of the chemical moieties for creating tailored adsorption sites. The adsorption sites on NH2-MCM-41 were created by grafting aminopropyls on MCM-41, and the random deposition resulted in a site distribution best described by the Freundlich equation. The majority of the adsorption sites (i.e., up to 70%) are readily accessible to Cu2+ adsorption. The remaining sites were only accessible in the presence of SO42−. Evidence showed that the SO42− anion affects the adsorption by interacting with the dissolved copper to form [CuSO4]0 species, coadsorbing with Cu2+ to form stable complexes, and may even indirectly react with the weakly acidic silanol groups to liberate aminopropyls for more Cu2+ adsorption. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie701748b

Kinetic study on bamboo pyrolysis / Edward L. K. Mui in Industrial & engineering chemistry research, Vol. 47 n°15 (Août 2008) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 47 n°15 (Août 2008) . - p. 5710-5722 Titre : Kinetic study on bamboo pyrolysis Type de document : texte imprimé Auteurs : Edward L. K. Mui, Auteur ; W. H Cheung, Auteur ; Vinci K. C. Lee, Auteur ; Gordon McKay, Auteur Année de publication : 2008 Article en page(s) : p. 5710-5722 Note générale : Bibliogr. p. 5721-5722 Langues : Anglais (eng) Mots-clés : Bamboo  --  pyrolysis;  Runge-Kutta  mechanism Résumé : Bamboo is an indigenous plant to many Asian countries; it is an extremely rapid growing plant, and with planned harvesting it can be produced as a sustainable raw material wood resource. The pyrolysis of bamboo has been studied to understand, model, and control the decomposition process as part of the overall process of producing activated carbons from bamboo. Different heating rates have been tested, and the pyrolysis mechanism has been modeled using the Runge-Kutta mechanism. The model has been applied assuming three-, four-, five-, and six-component reaction models. The best fit model, based on SSE values, is the six-component scheme using a Runge-Kutta solution methodology although the three-component reaction model correlates the data very well too. The basis for the selection of the six-component model is that each of the three main bamboo components, xylan, cellulose, and lignin, has one major decomposition step to volatiles and a minor decomposition to form char. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie070763w [article] Kinetic study on bamboo pyrolysis [texte imprimé] / Edward L. K. Mui, Auteur ; W. H Cheung, Auteur ; Vinci K. C. Lee, Auteur ; Gordon McKay, Auteur . - 2008 . - p. 5710-5722. Bibliogr. p. 5721-5722 Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 47 n°15 (Août 2008) . - p. 5710-5722 Mots-clés : Bamboo  --  pyrolysis;  Runge-Kutta  mechanism Résumé : Bamboo is an indigenous plant to many Asian countries; it is an extremely rapid growing plant, and with planned harvesting it can be produced as a sustainable raw material wood resource. The pyrolysis of bamboo has been studied to understand, model, and control the decomposition process as part of the overall process of producing activated carbons from bamboo. Different heating rates have been tested, and the pyrolysis mechanism has been modeled using the Runge-Kutta mechanism. The model has been applied assuming three-, four-, five-, and six-component reaction models. The best fit model, based on SSE values, is the six-component scheme using a Runge-Kutta solution methodology although the three-component reaction model correlates the data very well too. The basis for the selection of the six-component model is that each of the three main bamboo components, xylan, cellulose, and lignin, has one major decomposition step to volatiles and a minor decomposition to form char. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie070763w