天然气中硫化氢的测定方法及影响因素分析

硫化氢为剧毒气体,也是强腐蚀性物质,对气田作业区域的安全构成威胁,为保障气田安全开发,有必要对天然气中硫化氢进行定期监测。对实验室目前采用的亚甲蓝法、碘量法和快速检测管法3种硫化氢检测方法进行了说明,并对这3种方法中影响结果准确度和精密度的因素进行了分析,认为应根据天然气高含硫的特点,结合现场检测条件和实验室分析要求,正确选择硫化氢检测方法。

Some Methods to Determine H_2S in Natural Gas and Their Affecting Factors

H2S is not only highly poisonous but also strongly corrosive, which may threaten safety of work sites. So, it＇s necessary tregularly monitor it in natural gas in order to ensure a safe development. In this study, three experimental methods to determine H2 are presented, including methylene blue, iodometry, and analyticatube. In addition, some factors affecting their accuracy and precision are analyzed. Itis deemedthata rightmethod should be selected based on H2 S features, combining site condition with some experimental requirements.