相对湿度对硫铁化物自燃性的影响  

Influence of Relative Humidity on Pyrophoricity of Iron Sulfides

作　　者：万鑫[1] 赵杉林[2] 

机构地区：[1]渤海大学化学化工学院,辽宁锦州120000 [2]辽宁石油化工大学石油化工学院,辽宁抚顺113001

出　　处：《青岛科技大学学报（自然科学版）》2009年第4期304-306,共3页Journal of Qingdao University of Science and Technology:Natural Science Edition

基　　金：国家自然科学基金资助项目(20371024)

摘　　要：油品储罐中的H2S气体在没有O2的室温条件下能与储罐内壁铁的主要腐蚀产物Fe2O3发生化学反应生成硫铁化物，硫铁化物的氧化放热是引起含硫油品储罐着火的主要原因。为此，研究了在75℃的硫化温度下，水分的存在对硫铁化物的生成及不同相对湿度对硫铁化物自燃性的影响。通过Fe2O3硫化产物的氧化升温实验，分析不同条件对硫铁化物自燃性的影响。结果表明，在高温条件下，水分的存在是影响Fe2O3反应生成硫铁化物的重要因素，相对湿度为10％～15％条件下生成的硫铁化物自燃性最强，对储罐安全运行构成了一定威胁。Iron sulfides can be generated when iron oxide which is the predominant corrosion product in oil storage tank reacts with hydrogen sulfide at room temperature without oxygen. The oxidation heat of the iron sulfides is regarded as the main cause of tank fire. The influence of water on forming of iron sulfides and the influence of different relative humidity on pyrophoricity of iron sulfides were examined at 75℃. The influence of different conditions on pyrophoricity of iron sulfides was analyzed through the temperature-time curves of oxidation of Fe2O3 sulfurization product. The results showed that at higher temperature, the presence of water was an important factor which could influence Fe2O3 sulfurization. Iron sulfide is easy to self-ignite at the relative humidity from 10% to 15% ,which is hazardous to oil storage tank.

关 键 词：相对湿度 硫铁化物 自燃性 

分 类 号：TQ031.7[化学工程]