کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
11000587 | 1425367 | 2018 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Oxidative removal of dibenzothiophene and related sulfur compounds from fuel oils under pressurized oxygen at room temperature with hydrogen peroxide and a phosphorus-free catalyst: sodium decatungstate
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
We investigated the removal of dibenzothiophene (DBT) and related compounds, 4-methyldibenzothiophene (4-MeDBT), 4,6-dimethyldibenzothiophene (4,6-DMeDBT), 2,8-dimethyldibenzothiophene (2,8-DMeDBT), and 1-benzothiophene (1-BT) from several oil media at room temperature under pressurized O2 (0.6â¯MPa) by means of a three-phase reaction system consisting of the oil phase, an aqueous phase containing the phosphorus-free polyoxotungstate catalyst Na4W10O32·8H2O, H2O2, and tetraoctylammonium bromide, and the gas phase. Under conditions in which the initial DBT concentration in octane was 10.1â¯mM, the desulfurization ratio reached 87% after reaction for 6.5â¯h. The sulfur atoms in the initial DBT were well accounted for by the sulfur atoms in the residual DBT, the dibenzothiophene sulfone and dibenzothiophene 5-oxide in the octane phase, and the dibenzothiophene sulfone that precipitated. Prolonged reaction time to 18â¯h resulted in 92% desulfurization. The desulfurization of octane decreased in the order 2,8-DMeDBTâ¯~â¯DBTâ¯>â¯4-MeDBT >1-BTâ¯~â¯4,6-DMeDBT. Light oil and kerosene could also be desulfurized efficiently: after reaction for 6.5â¯h, the desulfurization ratios reached 77 and 78% for light oil and kerosene, respectively.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Fuel Processing Technology - Volume 179, October 2018, Pages 175-183
Journal: Fuel Processing Technology - Volume 179, October 2018, Pages 175-183
نویسندگان
Hisao Hori, Keisuke Ogi, Yuya Fujita, Yuta Yasuda, Eri Nagashima, Yusuke Matsuki, Kenji Nomiya,