取样钢瓶对天然气中总硫含量分析结果的影响

doi:10.3969/j.issn.1000-1158.2020.Z1.32

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摘要天然气中总硫含量的测定都是将现场的天然气样品通过取样钢瓶运送至实验室进行,普通取样钢瓶易吸附硫化物,而钝化之后的取样钢瓶能减少硫化物的吸附。采用紫外荧光法定量分析了钝化及普通取样钢瓶对硫化物的吸附,并将数据进行对比。结果表明,钝化取样钢瓶几乎不会对硫化物产生吸附,用其取样能准确的反应总硫含量,而普通取样钢瓶对硫化物的都有一定的吸附,并且遵循一定的吸附动力学,吸附后的样品不再具有代表性,用其取样不能准确的反应总硫含量,建议用钝化钢瓶取样进行总硫含量分析。

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	姜琛

关键词 ：计量学, 天然气, 总硫, 紫外荧光, 取样钢瓶, 钝化

Abstract：The determination of total sulfur content in natural gas is to transport the on-site natural gas samples to the laboratory through the sampling steel cylinder. The ordinary sampling cylinder is easy to adsorb sulfide, while the passivated sampling cylinder can reduce the adsorption of sulfide. The adsorption of sulfide by passivated and ordinary steel cylinders is analyzed quantitatively by the ultraviolet fluorescence method, and the data are compared. The results show that the passivated sampling cylinder can hardly adsorb the sulfide, and the total sulfur content can be accurately analyzed by using it, while the ordinary sampling cylinder can adsorb the sulfide to a certain extent and follow certain adsorption kinetics, which makes the sample no longer representative, and the total sulfur content cannot be accurately analyzed by using the passivation sampling cylinder. It is recommended to use passivated cylinder for total sulfur content analysis.

Key words： metrology natural gas total sulfur ultraviolet fluorescence sampling steel cylinder passivated

PACS:

TB99

作者简介: 姜琛(1992-),男,山东青岛人,中国石化天然气分公司计量研究中心工程师,主要从事天然气检测工作。Email: jiangchenjeason@163.com

引用本文:

姜琛. 取样钢瓶对天然气中总硫含量分析结果的影响[J]. 计量学报, 2020, 41(12A): 177-182.
JIANG Chen. Natural Gas YuJi Pipeline Company, China Petroleum & Chemical Corporation, Jinan, Shandong 250101, China. Acta Metrologica Sinica, 2020, 41(12A): 177-182.

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http://jlxb.china-csm.org:81/Jwk_jlxb/CN/10.3969/j.issn.1000-1158.2020.Z1.32 或 http://jlxb.china-csm.org:81/Jwk_jlxb/CN/Y2020/V41/I12A/177

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