气相色谱-离子迁移谱法检测天然气中形态硫的方法探讨  

Discussion on determination of sulfur compounds in natural gas by gas chromatography-ion mobility spectrometry

作　　者：王晓琴 周理[1,2] 沈琳 刘川[3] 郭利平 Wang Xiaoqin;Zhou Li;Shen Lin;Liu Chuan;Guo Liping(Research Institute of Natural Gas Technology,PetroChina Southwest Oil&Gasfield Company,Chengdu,Sichuan,China;Key Laboratory of Natural Gas Quality Control and Energy Measurement,CNPC,Chengdu,Sichuan,China;Chongqing Gas District,PetroChina Southwest Oil&Gasfield Company,Chongqing,China;CDB Operating Company,PetroChina Southwest Oil&Gasfield Company,Dazhou,Sichuan,China)

机构地区：[1]中国石油西南油气田公司天然气研究院 [2]中国石油天然气集团公司天然气质量控制和能量计量重点实验室 [3]中国石油西南油气田公司重庆气矿 [4]中国石油西南油气田公司川东北作业分公司

出　　处：《石油与天然气化工》2022年第1期110-117,共8页Chemical engineering of oil & gas

基　　金：中国石油西南油气田公司科学研究与技术开发项目“天然气中总硫在线分析新方法及技术研究”(20190308-02);中国石油天然气股份有限公司科学研究与技术开发项目“油气地面工程关键技术研究与应用——高酸性天然气高效处理技术研究”(2019D-1609)。

摘　　要：目的基于气相色谱-离子迁移谱技术建立了测定天然气中形态硫的方法。方法简要论述了方法的基本原理和特色技术,在优化的试验条件下,评价了方法的可靠性,探讨了方法的有效性、选择性、重复性和准确性等性能指标。结果确定在0~30 mg/m^(3)(单个硫化合物)范围内:方法的重复性≤3%,检出限为0.01~0.12 mg/m^(3)(单个硫化合物);方法的准确性为标准物质比对分析的相对分析偏差≤8%,不同检测方法比对分析的相对分析偏差≤16%。结论气相色谱-离子迁移谱技术首次对天然气中12种形态硫进行分析,开辟了总硫含量检测新途径,通过现场适应性验证研究,方法准确度高,具有现场便携检测能力。Objective Based on gas chromatography-ion mobility spectrometry,a method for the determination of speciation sulfur in natural gas was established.Methods The basic principle and characteristic technology of the method were briefly discussed.Under the optimized experimental conditions,the reliability of the method was evaluated,and the performance indexes of the method such as effectiveness,selectivity,repeatability and accuracy were discussed.Results In the range of 0-30 mg/m^(3)(single sulfur compound),the repeatability of the method was less than 3%,the detection limit was 0.01-0.12 mg/m^(3)(single sulfur compound),the relative analysis deviation of standard materials was not more than 8%,and the relative analysis deviation of different detection methods was not more than 16%.Conclusions It’s the first time to analyze 12 sulfur compounds in natural gas by GC-IMS,which opens up a new way for testing total sulfur.Through the field verification research of adaptability,the method has been proved to have high accuracy and field portable detection ability.

关 键 词：气相色谱-离子迁移谱法 检测 天然气 形态硫 

分 类 号：O657[理学—分析化学] TE648[理学—化学]