摘要
目的鉴于ISO 19739:2004《天然气采用气相色谱法测定硫化合物》自2004年发布以来,一直未做过修订,现提出ISO 19739:2004存在的主要问题并给出修订建议。方法为了支撑ISO 19739:2004的修订,通过与标准气体证书值比对、与ISO 16960:2014《天然气硫化合物的测定氧化微库仑法测定总硫》测定结果比对、与ISO 20729:2017《天然气硫化合物的测定紫外荧光法测定总硫》测定结果比对共3种方法,来验证色谱法测定总硫含量的准确性;依据ISO 4259:2006《石油产品试验方法精密度数据确定法》初步开展了精密度试验研究。结果ISO 19739:2004色谱法测定总硫含量,与标准气体证书值、ISO 16960:2014测定结果、ISO 20729:2017测定结果相比一致性情况好。结论色谱法测定天然气总硫含量准确可靠;建议修订ISO 19739:2004,在标准范围中明确规定可以用于总硫含量的测定和计算,并在标准中给出总硫的计算公式;建议在下一步修订过程中,依据ISO 4259-1:2017《石油及相关产品测量方法与结果精密度第1部分:试验方法精密度数据的确定》开展精密度试验研究,完善精密度的规定,将精密度的规定从7种硫化合物增加到10种以上,扩大标准精密度规定的范围;建议加强多组分硫化合物气体标准物质的研制及国家标准物质认证工作的开展,为后续ISO 19739:2004的修订提供基础条件。
Objective In view of ISO 19739:2004 Natural gas—Determination of sulfur compounds using gas chromatography has not been revised since its publication in 2004,the main problems existing in ISO 19739:2004 are put forward and suggestions for revision are given.Methods In order to support the revision of ISO 19739:2004,the accuracy of total sulfur content determined using chromatography is verified by comparing with the value of standard gas certificate,the determination result of ISO 16960:2014 Natural gas—Determination of sulfur compounds—Determination of total sulfur by oxidative microcoulometry method and the determination result of ISO 20729:2017 Natural gas—Determination of sulfur compounds—Determination of total sulfur content by ultraviolet fluorescence method;According to ISO 4259:2006 Petroleum products—Determination and application of precision data in relation to methods of test,preliminary precision test research was carried out.Results The total sulfur content determined using chromatography is in good agreement with the standard gas certificate value,the determination results of ISO 16960:2014 and ISO 20729:2017.Conclusions The determination of total sulfur in natural gas using chromatography is accurate and reliable;It is suggested to revise ISO 19739:2004,which are to specifying in the scope of the standard can be used for the determination and calculation of total sulfur content,and giving the calculation formula of total sulfur in the standard;It is suggested that in the next revision process,to carry out precision test and research according to ISO 4259.1:2017 Petroleum and related products—Precision of measurement methods and results—Part 1:Determination of precision data in relation to methods of test,increase the precision regulations from seven sulfur compounds to more than ten,so as to expand the scope of standard precision regulations;It is suggested to strengthen the development of multi-component sulfur compound gas reference materials and the certification of national refe
作者
周理
罗勤
李晓红
王晓琴
Zhou Li;Luo Qin;Li Xiaohong;Wang Xiaoqin(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)
出处
《石油与天然气化工》
CAS
CSCD
北大核心
2022年第5期124-130,138,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“天然气产品质量指标检测一体化方法研究”(20210308-02)。
关键词
气相色谱法
测定
天然气
硫化合物
国际标准
修订
gas chromatography
determination
natural gas
sulfur compound
international standard
revision
