doi:10.16597/j.cnki.issn.1002-154x.2025.02.006
能量色散X射线荧光光谱法测定渣油金属含量
张灵美
(中国石化扬子石油化工有限公司质量检验和管理中心,南京210048)
摘 要
渣油的金属含量直接影响渣油加氢催化剂的使用年限,目前石油化工行业主要使用等离子体发射光谱法(ICP-OES)来分析渣油中的金属含量。虽然该方法检测结果精确,但无法实现快速分析且存在环境风险。能量色散X射线荧光光谱法(EDXRF)的测试时间约为ICP-OES的1/25。开发EDXRF测定渣油中金属含量,实现对ICP-OES的取代,能够有效提升渣油金属元素含量的检验效率。通过对62组渣油样品进行EDXRF元素分析检测,衡量该方法的检测结果与ICP-OES结果的一致性。研究结果表明，EDXRF测量系统在检测渣油Fe、Ni、V3种元素时再现性优异，3种元素检测的过程能力指数均大于1.33,表明了EDXRF在测试渣油金属元素含量时能够有效替代ICP-OES。
关键词 能量色散X射线荧光光谱 渣油 金属元素 再现性 过程能力
Rapid Determination of Metal Elements in Residual Oil by Energy Dispersive X-ray Fluorescence Spectrometry
ZHANG Lingmei
(Quality Inspection and Management Center, Sinopec Yangzi Petrochemical Co., Ltd., Nanjing 210048, China)
Abstract
The catalyst service life of hydrogenation unit is directly affected by the metal content of residual oil.At present, inductively coupled plasma optical emission spectrometer(ICP-OES) is widely applicated analyzing metal content of residual oil in petrochemical industry. Although the detection result of this method is accurate but inability to achieve fast analysis. The test time of energy dispersive X-ray fluorescence spectrometry(EDXRF) is about 1/25 of that of ICP-OES. Developing EDXRF as an alternative to old method can improve the inspection efficiency of metal content in residual oil. In this paper, 62 groups of residual oil samples are tested by EDXRF to measure whether the method is consistent with the detection results of ICP-OES. The results show that the EDXRF measurement system exhibit excellent reproducibility when detecting Fe, Ni and V elements in the residual oil, and all of the process capability index are higer than 1.33. The above verification experiment indicated that the EDXRF can effectively replace the ICP-OES in the detection of metal elements in the residual oil.
Keywords energy dispersive X-ray fluorescence spectrum residual oil metallic element process capability