酸性离子液体萃取-氧化模拟油品脱硫研究

以酸性离子液体N-羧甲基吡啶硫酸氢盐([CH2COOHPy]HSO4)为萃取剂和催化剂,过氧化氢为氧化剂,用于模拟油品(二苯并噻吩溶于正辛烷配制而成)萃取-氧化脱硫反应,考察过氧化氢用量、离子液体用量、反应温度和反应时间对脱硫率的影响。研究结果表明,当氧硫摩尔比(H2O2/S)为6,在10 mL模拟油品中加入0.6 mL离子液体,50℃下反应40 min,脱硫率可达99.7%。离子液体循环再生使用5次,脱硫率没有明显下降。

模拟油品氧化脱硫及反应动力学研究

在H2O2/WO3/ZrO2氧化体系中对以甲苯为溶剂、二苯并噻吩(DBT)为模型含硫化合物的模拟油品(硫的质量分数为1 540×10-6)进行了氧化脱硫研究,考察了反应温度、反应时间、氧化剂加入量、催化剂用量对DBT转化率的影响。实验结果表明,在反应温度50℃,反应时间90 min,氧化剂加入量油/H2O2的体积比为20∶1和催化剂用量0.02 g/mL的适宜氧化脱硫条件下,96%以上的DBT氧化为容易分离脱除的二苯并噻吩砜(DBTOs);同时研究了DBT氧化反应动力学,得知DBT氧化反应为一级反应,表观活化能Ea为55.37 kJ/mol,指前因子A为3.35×107 min-1。

氧化-萃取耦合模拟油品深度脱硫研究

以分别溶有苯并噻吩(BT)和二苯并噻吩(DBT)的正辛烷溶液为模拟油品(硫含量均为1 540μg/g),以WO3/ZrO2固体超强酸为催化剂,H2O2为氧化剂,N,N-二甲基甲酰胺(DMF)为萃取溶剂,考察氧化-萃取耦合工艺参数对BT和DBT脱除率的影响,确定模拟油品氧化-萃取耦合脱硫的最佳工艺条件,并探讨氧化-萃取耦合脱硫机理。结果表明,在氧化-萃取耦合脱硫优化条件下,即耦合脱硫温度60℃,耦合脱硫时间90 min,氧化剂用量V(油)∶V(H2O2)=33.3∶1,催化剂用量0.02 g/mL油,萃取溶剂用量V(溶剂)∶V(油)=1∶1,此时BT和DBT脱除率分别达到92.40%和97.46%。

CeO2/TiO2光催化剂的制备及其可见光脱氮性能

采用溶胶-凝胶和浸渍掺杂两步法合成了Ce O2/Ti O2光催化剂,并对催化剂的理化结构进行表征分析;以吡啶-正辛烷体系为模拟油品氮源,研究了该催化剂在可见光作用下的光催化脱氮行为,并探究了光催化脱氮的最佳反应条件。结果表明,掺杂的铈主要以Ce O2的形式存在,且增强了催化剂在可见光区的吸收;在可见光辐照150 min的条件下,铈的掺杂量质量分数为8%,所制备的Ce O2/Ti O2催化剂投入量为1.0 g/L时,模拟油品中吡啶的脱氮率高达76.45%。

An Awesim Simulation Study： To Determine the Efficiency of Future Improvements on Tupras Izmit Oil Terminal

Oil and oil products occupy an important place in the industry and transportation sectors, both as bunker and raw materials. Most oil and oil products are transported by sea. The aim of this study was to evaluate the handling capacity of the Tupraslzmit Tanker Terminal, which is an important hub for Turkey with regards to the transportation ofoil and refined oil products. To assess the capacity of the port and to determine the amount of queuing that could form with regards to tug services; the Awesim simulation program was used. Based on the study results, a comparison was performed between the port＇s current annual handling capacity and the maximum amount of cargo it can handle. In addition, by using the study data, the maximum amount of queuing that can form in tug services was also calculated for days with unfavorable weather and sea conditions. This study thus represents a case study performed with the Awesim modeling program in order to determine port efficiency.