[article] 
inIndustrial & engineering chemistry research > Vol. 49 N° 7 (Avril 2010) . - pp. 3152–3159

Titre :	Role of pore structure of activated carbon fibers in the catalytic oxidation of H2S
Type de document :	texte imprimé
Auteurs :	Qingjun Chen, Auteur ; Zhi Wang, Auteur ; Donghui Long, Auteur
Année de publication :	2010
Article en page(s) :	pp. 3152–3159
Note générale :	Industrial Chemistry
Langues :	Anglais (eng)
Mots-clés :	Activated Carbon Fibers Catalytic Oxidation Pore H2S
Résumé :	Na2CO3-impregnated activated carbon fibers (ACFs) have been developed as low-concentration H2S oxidation catalysts at ambient temperature. Two series of commercial pitch-based and poly(acrylonitrile)-based ACFs were used to evaluate the role of pore structure in the oxidation of H2S. The initial, impregnated, and exhausted materials were characterized using elemental analysis, N2 adsorption, scanning electron microscopy (SEM), thermogravimetry analysis, and activity tests. The catalytic oxidation of H2S continued until all effective pores of the catalysts were blocked by the oxidation products. The saturation sulfur capacity was found to be in the range of 0.10−0.81 g of H2S/g of catalyst, with the value strongly dependent on the pore structure (especially the volume of pores larger than 0.7 nm) but independent of the nitrogen functional groups. Further quantitative analysis suggested that elemental sulfur as a dominant product mostly deposited in large pores (d > 0.7 nm), whereas sulfuric acid was preferably produced in small micropores (d
ISSN :	0888-5885
En ligne :	http://pubs.acs.org/doi/abs/10.1021/ie901223j

[article] Role of pore structure of activated carbon fibers in the catalytic oxidation of H2S [texte imprimé] / Qingjun Chen, Auteur ; Zhi Wang, Auteur ; Donghui Long, Auteur . - 2010 . - pp. 3152–3159.
Industrial Chemistry
Langues : Anglais (eng)
in Industrial & engineering chemistry research > Vol. 49 N° 7 (Avril 2010) . - pp. 3152–3159

Mots-clés :	Activated Carbon Fibers Catalytic Oxidation Pore H2S
Résumé :	Na2CO3-impregnated activated carbon fibers (ACFs) have been developed as low-concentration H2S oxidation catalysts at ambient temperature. Two series of commercial pitch-based and poly(acrylonitrile)-based ACFs were used to evaluate the role of pore structure in the oxidation of H2S. The initial, impregnated, and exhausted materials were characterized using elemental analysis, N2 adsorption, scanning electron microscopy (SEM), thermogravimetry analysis, and activity tests. The catalytic oxidation of H2S continued until all effective pores of the catalysts were blocked by the oxidation products. The saturation sulfur capacity was found to be in the range of 0.10−0.81 g of H2S/g of catalyst, with the value strongly dependent on the pore structure (especially the volume of pores larger than 0.7 nm) but independent of the nitrogen functional groups. Further quantitative analysis suggested that elemental sulfur as a dominant product mostly deposited in large pores (d > 0.7 nm), whereas sulfuric acid was preferably produced in small micropores (d
ISSN :	0888-5885
En ligne :	http://pubs.acs.org/doi/abs/10.1021/ie901223j