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DIRECT MEASUREMENT OF LOW LEVEL CHLORINE IN CRUDE OIL

机译:直接测量原油中的低含量氯

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摘要

Relatively high levels of salt in crude oils can be a serious issue due its corrosive characteristics. Direct monitoring of salt in crude has an important economic aspect for the petroleum industry. The salt level in crude oil can be determined by measuring the chlorine content since salt contributes the majority of the chlorine content in the oil. A compact chlorine detection engine is developed using monochromatic wavelength-dispersive x-ray fluorescence analysis. A doubly-curved crystal (DCC) is coupled with a low-power x-ray tube to provide an intense monochromatic beam for sample excitation. A second DCC is designed to collect Cl Ka (2.6 keV) x-rays to a proportional counter. The number of Cl Ka x-rays photons detected is directly proportional to the Cl (Chlorine) concentration in oil. Due to the very narrow energy band width of the collection DCC, interference of other elements in the crude oil is eliminated. A bench-top Cl analyzer based on this engine was made and the detection capability was evaluated. A minimum detection limit of 0.16 ppm was obtained with 300s measurement time.rnMeasurement results on crude oil samples will be presented. The measurement background and sensitivity of the analyzer will be also discussed.
机译:原油中盐分相对较高可能会由于其腐蚀性而成为一个严重的问题。直接监测原油中的盐对石油工业具有重要的经济意义。原油中的盐含量可以通过测量氯含量来确定,因为盐占了油中氯含量的大部分。使用单色波长色散X射线荧光分析技术开发了紧凑型氯检测引擎。双曲线晶体(DCC)与低功率X射线管耦合在一起,可为样品激发提供强烈的单色光束。第二个DCC旨在将Cl Ka(2.6 keV)X射线收集到比例计数器。检测到的Cl Ka x射线光子数量与油中Cl(氯)浓度成正比。由于收集DCC的能带宽度非常窄,因此消除了其他元素对原油的干扰。制作了基于此引擎的台式Cl分析仪,并评估了检测能力。在300s的测量时间内获得的最低检出限为0.16ppm。rn将给出对原油样品的测量结果。还将讨论分析仪的测量背景和灵敏度。

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