Fe_2O_3 H_2S腐蚀产物的XPS研究

XPS Study on Hydrogen Sulfide Corrosion Products from Ferric Oxide

模拟含硫原油加工过程中生成的具有高自燃性的腐蚀产物,利用Fe_2O_3与H_2S反应制备硫铁化合物,将硫化反应产物分为两部分,一部分保存在乙醇中,一部分暴露于空气中。用XPS研究硫化产物及其氧化产物中S和Fe的存在形态。结果表明,硫化产物中S主要存在形式是FeS_2;氧化产物中S主要存在形式是硫酸盐,少部分FeS、单质硫及FeSx。硫化产物和氧化产物中Fe的主要存在形式都是Fe_2O_3和FeS_2。

Iron sulfide, a chemical of high pyrophorisity, may be produced through reaction of ferric oxide with hydrogen sulfide, which can be encountered during the crude oil processing. The chemical state of sulfur and iron in the as prepared iron sulfide and its oxidation products was characterized by means of X-ray photoelectron spectroscopy （XPS）. The results show that sulfur exists in the as prepared iron sulfide as a component of pyrite, which then converts into sulfate after oxidation. The iron exists as a component of both pyrite and ferric oxide in the as prepared iron sulfide and the oxidized ones respectively.