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Removal of thiophenic sulfurs using an extractive oxidative desulfurization process with three New phosphotungstate catalysts / Hongxing Zhang in Industrial & engineering chemistry research, Vol. 51 N° 19 (Mai 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 19 (Mai 2012) . - pp. 6658–6665 Titre : Removal of thiophenic sulfurs using an extractive oxidative desulfurization process with three New phosphotungstate catalysts Type de document : texte imprimé Auteurs : Hongxing Zhang, Auteur ; Jiajun Gao, Auteur ; Hong Meng, Auteur Année de publication : 2012 Article en page(s) : pp. 6658–6665 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Thiophenic  sulfurs  Desulfurization  process Résumé : Three Keggin-type phosphotungstates, i.e. [C5H5NH]3PW12O40, [C4H6N2H]3PW12O40·3C4H6N2 and [(C4H9)4N]3PW12O40, were synthesized and characterized by elemental analysis, X-ray diffraction, and infrared spectra, meanwhile their catalysis in an extractive catalytic oxidative desulfurization process was studied with ionic liquid (IL) as extractant and H2O2 as oxidant. The main factors affecting the desulfurization process were investigated, including temperature, hydrophobicity of IL, and variety of S-compounds, as well as the amount of catalyst, IL, and H2O2. Under the optimal conditions, the S-content of DBT oil can be decreased from 1000 to 2 ppm. A new interpretation is proposed for the current process, in which IL is assumed as a reaction phase, and the amount of the extracted S-compound and the peroxidized catalyst wherein greatly affect the desulfurization rate. Besides, the IL with the dissolved catalyst can be reused many times and regenerated easily. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie3004545 [article] Removal of thiophenic sulfurs using an extractive oxidative desulfurization process with three New phosphotungstate catalysts [texte imprimé] / Hongxing Zhang, Auteur ; Jiajun Gao, Auteur ; Hong Meng, Auteur . - 2012 . - pp. 6658–6665. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 19 (Mai 2012) . - pp. 6658–6665 Mots-clés : Thiophenic  sulfurs  Desulfurization  process Résumé : Three Keggin-type phosphotungstates, i.e. [C5H5NH]3PW12O40, [C4H6N2H]3PW12O40·3C4H6N2 and [(C4H9)4N]3PW12O40, were synthesized and characterized by elemental analysis, X-ray diffraction, and infrared spectra, meanwhile their catalysis in an extractive catalytic oxidative desulfurization process was studied with ionic liquid (IL) as extractant and H2O2 as oxidant. The main factors affecting the desulfurization process were investigated, including temperature, hydrophobicity of IL, and variety of S-compounds, as well as the amount of catalyst, IL, and H2O2. Under the optimal conditions, the S-content of DBT oil can be decreased from 1000 to 2 ppm. A new interpretation is proposed for the current process, in which IL is assumed as a reaction phase, and the amount of the extracted S-compound and the peroxidized catalyst wherein greatly affect the desulfurization rate. Besides, the IL with the dissolved catalyst can be reused many times and regenerated easily. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie3004545