Documents disponibles écrits par cet auteur

Catalytic oxidative desulfurization of fuel by H2O2 in situ produced via oxidation of 2 - propanol / Hong-xing Zhang in Industrial & engineering chemistry research, Vol. 51 N° 13 (Avril 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 13 (Avril 2012) . - pp. 4868–4874 Titre : Catalytic oxidative desulfurization of fuel by H2O2 in situ produced via oxidation of 2 - propanol Type de document : texte imprimé Auteurs : Hong-xing Zhang, Auteur ; Jia-jun Gao, Auteur ; Hong Meng, Auteur Année de publication : 2012 Article en page(s) : pp. 4868–4874 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Catalytic  oxidative Résumé : A novel integrated process is proposed for the catalytic oxidative desulfurization of fuel oil, in which the oxidant H2O2 is in situ generated by oxidizing 2-propanol with oxygen, and its feasibility is evaluated in terms of the S-conversion of 3-methylthiophene (3-MT), benzothiophene (BT), and dibenzothiophene (DBT) in octane under varying conditions. The catalysis of [π-C5H5NC16H33]3[PW4O16] is found to be much superior to H3PW12O40 and [(C4H9)4N]3[PW12O40] due to its good dispersivity in oil and adsorptivity for S-compounds. Some influencing factors for the S-conversion were studied, viz., time, temperature, various S-compounds, and the amount of 2-propanol, initiator, oxygen, and catalyst. All factors that favor the production of the 2-propanol radicals affect the desulfurization rate remarkably. Both BT and DBT can be removed efficiently at mild conditions (1.4 MPa O2, 90 °C) in 6 h with S-conversion above 96%, and the resulting sulfones can be separated via settling or filtration. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie300035c [article] Catalytic oxidative desulfurization of fuel by H2O2 in situ produced via oxidation of 2 - propanol [texte imprimé] / Hong-xing Zhang, Auteur ; Jia-jun Gao, Auteur ; Hong Meng, Auteur . - 2012 . - pp. 4868–4874. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 13 (Avril 2012) . - pp. 4868–4874 Mots-clés : Catalytic  oxidative Résumé : A novel integrated process is proposed for the catalytic oxidative desulfurization of fuel oil, in which the oxidant H2O2 is in situ generated by oxidizing 2-propanol with oxygen, and its feasibility is evaluated in terms of the S-conversion of 3-methylthiophene (3-MT), benzothiophene (BT), and dibenzothiophene (DBT) in octane under varying conditions. The catalysis of [π-C5H5NC16H33]3[PW4O16] is found to be much superior to H3PW12O40 and [(C4H9)4N]3[PW12O40] due to its good dispersivity in oil and adsorptivity for S-compounds. Some influencing factors for the S-conversion were studied, viz., time, temperature, various S-compounds, and the amount of 2-propanol, initiator, oxygen, and catalyst. All factors that favor the production of the 2-propanol radicals affect the desulfurization rate remarkably. Both BT and DBT can be removed efficiently at mild conditions (1.4 MPa O2, 90 °C) in 6 h with S-conversion above 96%, and the resulting sulfones can be separated via settling or filtration. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie300035c

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