| 摘要: | 隨著法規需求日益嚴苛，許多煉油廠對於油品脫硫這方面的要求也隨之嚴格，因此研究更有效的替代方法是非常急需的，以氧化脫硫法進行去除油品硫化物是現今熱門的替代方法之一。
本研究使用的離子液體為1-丁基-3-甲基咪唑六氟磷酸鹽(1-Butyl-3-methylimidazolium Hexafluorophosphate，縮寫 : [Bmim][PF6])，模擬油品 : 二苯並噻吩(Dibenzothiophene,縮寫 : DBT)，透過氧化萃取法探討兩種萃取模式，其一 : 雙階段氧化脫硫，當轉速(5400 RPM)、鎢磷酸(0.2 g)、溴化四辛基銨(0.03 g)、雙氧水(10 ml)、高剪斷力乳化時間(30 min)，其氧化效率達99.31 %；當轉速(700 RPM)、[Bmim][PF6](6 ml)、反應時間(5 min)，達到81.82 %脫硫效果。其二 : 單階段氧化脫硫，當轉速(5400 RPM)、鎢磷酸(0.4 g)、溴化四辛基銨(0.06 g)、雙氧水(20 ml)、DBTO (10 ml) : [Bmim][PF6](10 ml)、反應時間(60 min)，其氧化效率為75.86 %，總硫去除率為75.48 %。
研究得知雙階段氧化萃取模式之氧化及萃取之p-values值與F-values值，氧化流程中反應時間、溴化四辛基銨、鎢磷酸和雙氧水較低之p-values值分別為1.97×10-4、4.46×10-4、544.30×10-4和286.29×10-4；較高之F-values值為5077.1、2241.1、16.9和33.4，萃取流程中反應時間、離子液體劑量和轉速較低之p-values值分別為0.3、127.81×10-5和0.2另外，較高之F-values值為1.7、780.7和4.2，並根據其值大小得知氧化流程中四個參數對DBT的硫氧化有顯著影響，其中反應時間具最顯著的影響，萃取流程中三個參數對DBTO的硫萃取有顯著影響，其中離子液體劑量具最顯著的影響。
As the regulatory requirements more stringent, many oil refineries for oil desulfurization requirements are also stricter. Therefore, it is highly desirable to study more efficient alternatives. Removal of oil sulfide by oxidative desulfurization is one of the popular alternatives today.
Which the ionic liquid used in this study was 1-butyl-3-methylimidazole hexafluorophosphate, abbreviated: [Bmim] [PF6]), simulated oil: Dibenzothiophene (abbreviation: DBT) To investigate two extraction modes by oxidative extraction, one of them: bis oxidative desulfurization stage, when the oxidative efficiency of rotational speed (5400 RPM), tungstophosphoric acid (0.2 g), tetraoctylammonium bromide (0.03 g), hydrogen peroxide (10 ml), high shear power emulsification time (30 min), was 99.31%. When the speed (700 RPM), [Bmim] [PF6] (6 ml), reaction time (5 min), with 81.82% desulfurization effect. Second : single stage oxidative desulfurization, when the oxidation efficiency of the Centrifugal speed (5400 RPM), tungstophosphoric acid(0.4 g),tetraoctylammonium bromide(0.06 g), hydrogen peroxide(20 ml),DBTO (10 ml) : [Bmim][PF6](10 ml),Reaction time (60 min) was 75.86% , the total sulfur removal rate was 75.48%.
The study showed that the p-values and F-values of oxidation and extraction in the two-stage oxidation extraction model were lower than those in the oxidation process. The p-values values of the octa-octylammonium bromide, tungstophosphoric acid and hydrogen peroxide were 1.97 × 10-4, 4.46 × 10-4, 543.30 × 10-4 and 286.29 × 10-4. The higher F-values values are 5077.1, 232.1.1, 16.9 and 33.4, and the p-values of the reaction time, ionic liquid dose and rotational speed in the extraction process are 0.3, 127.81 × 10-5 and 0.2 respectively. The higher F-values are 1.7, 780.7 and 4.2. And the four parameters in the oxidation process have a significant effect on the sulfur oxidation of DBT according to their size. There’s the most significant effect in the reaction time, there’s a significant effect on the sulfur extraction of DBTO in the three parameters of the extraction process, in which the ionic liquid dose has the most significant effect. |
