The effects of metallic catalysts on light crude oil oxidation in limestone medium
The effects of metallic catalysts on light crude oil oxidation in limestone medium
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DOI：
10.1016/s0378-3820(02)00098-x
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发表时间：
2002-08
影响因子：
7.5
通讯作者：
D. Çelebioğlu;S. Baǧci
中科院分区：
文献类型：
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作者：
D. Çelebioğlu;S. Baǧci
本研究通过28项实验研究了金属添加剂对轻质原油在石灰石介质中氧化的影响。使用了土耳其油田的卡拉库伊和贝坎原油。金属添加剂为氯化铁（FeCl3）、氯化铜（CuCl）和氯化镁（MgCl2·6H2O）。将三种金属盐的水溶液与石灰石和原油混合，在恒定的空气流速下进行受控加热。对产生的气体进行了氧和碳氧化物含量的分析。反应动力学结果表明，添加添加剂后，燃料燃烧的摩尔CO2/CO比值增大。在所有运行过程中，观察到原子H/C比随着温度的升高而降低。在两种原油中，随着铜和氯化镁添加剂浓度的增加，Arrhenius方程中m的反应级数增大，而随着氯化铁添加剂浓度的增加，m的反应级数减小。除氯化铁外，其他金属添加剂均降低了两种原油的Arrhenius常数Ar。随着氯化铁浓度的增加，卡拉库伊原油的活化能增大，贝坎原油的活化能减小。氯化铜添加剂对两种原油表现出相同的趋势。1.0 mol%的浓度降低了活化能。2.0 mol%的氯化镁增加了卡拉库伊原油的活化能，降低了贝坎原油的活化能。对于卡拉库伊原油，2.0 mol%金属添加剂的耗氧曲线呈单峰。添加1.0 mol%的氯化铁和氯化镁与不添加添加剂的反应过程相似，但两种浓度的金属盐的氧化反应峰都出现在较低的温度下。对于北坎原油，与标准运行相比，所有添加剂都降低了峰值温度。曲线的趋势实际上是一样的。两种原油的氯化铜浓度分别为1.0 mol%和2.0 mol%时均出现一个峰值。
In this study, 28 experiments were performed to study the effects of metallic additives on light crude oil oxidation in limestone medium. Karakuş and Beykan crude oils from Turkish oil fields were used. The metallic additives were ferric chloride (FeCl3), copper chloride (CuCl) and magnesium chloride (MgCl2·6H2O). The mixture of aqueous solutions of three metallic salts with limestone and the crude oils was subjected to a controlled heating schedule under a constant flow rate of air. The produced gas was analysed for its oxygen and carbon oxides contents. The results of reaction kinetics showed that the molar CO2/CO ratio values of fuel combustion increased when additives were added. A decrease in the atomic H/C ratio with an increase in temperature was observed for all runs. The reaction order, m in Arrhenius equation increases as concentration of copper and magnesium chloride additive increases but decreases as ferric chloride additive increases in both crude oils. It is observed that the metallic additives except ferric chloride decreased the Arrhenius constant, Ar, for both crude oils. As concentration of ferric chloride increases the activation energy of Karakuş crude oil increases while activation energy of Beykan crude oil decreases. The copper chloride additive shows same trend for both crude oils. The 1.0 mol% concentration decreases the activation energies. The 2.0 mol% magnesium chloride increases the activation energy of Karakuş crude oil while decreases the activation energy of Beykan crude oil more than 1.0 mol% does. For Karakuş crude oil, the oxygen consumption curves of 2.0 mol% of metallic additives show one peak. There is similar behavior between runs with 1.0 mol% of ferric chloride and magnesium chloride and runs with no additive, but the oxidation reaction peaks with metallic salts at both concentrations occurs at lower temperatures. For Beykan crude oil, all the additives lower the peak temperature when they are compared to standard run. The trends of the curves are actually the same. Copper chloride shows one peak with the 1.0 and 2.0 mol% runs for both crude oils.