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Studying mercury partition in monoethylene glycol (MEG) used in gas facilities

机译：研究天然气设施中单乙二醇（MEG）中的汞分配

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摘要

Mercury partitioning from monoethylene glycol (MEG) during natural gas production is a highly complicated process. Understanding this process will help determine the distribution of mercury species within a given industrial process so that appropriate mercury removal control systems can be effectively managed. In this study, the partitioning of elemental mercury (Hg-0) from the gaseous phase into MEG solutions is investigated under standard laboratory conditions. Additionally, the partitioning of dissolved ionic mercury (Hg2+) from MEG solutions into the gaseous phase is also investigated under atmospheric pressure and room temperature conditions. It was found that the solubility of Hg-0 in MEG ranged from 0 to 60 ppb (ng/mL) with slight increase to similar to 80 ppb when the pH was reduced from similar to 9 to similar to 6 at room temperature. On the other hand oxidized mercury (Hg2+) was found to be retained in the laboratory grade MEG and industrial samples of MEG (industrial-MEG). However, in the case of the industrial-MEG, the dissolved mercury (HgCl2 salt) was found to be unstable with approximately 3.6% and 10% converting within the solution and leaving in the gas phase as Hg-0 and Hg2+, respectively, while the balance was retained in the MEG solution. The distribution was found to be highly pH dependent and was not observed when the experiments were repeated using laboratory grade MEG solutions. These findings help in better understanding the type and ratio of mercury species that are partitioned in and out of MEG in the gas processing facilities. (C) 2015 Elsevier Ltd. All rights reserved.
机译：在天然气生产过程中从单乙二醇（MEG）中进行汞分配是一个非常复杂的过程。了解此过程将有助于确定给定工业过程中汞种类的分布，以便可以有效地管理适当的除汞控制系统。在这项研究中，在标准实验室条件下研究了气相中元素汞（Hg-0）在MEG溶液中的分配。此外，还研究了在大气压和室温条件下，MEG溶液中溶解的离子汞（Hg2 +）从气相中的分配。发现在室温下，当pH从约9降低到约6时，Hg-0在MEG中的溶解度在0至60 ppb（ng / mL）之间，并略有增加，接近80 ppb。另一方面，发现氧化汞（Hg2 +）被保留在实验室级MEG和MEG的工业样品（工业MEG）中。但是，在工业制乙二醇的情况下，发现溶解的汞（HgCl2盐）不稳定，溶液中约有3.6％和10％的转化，并以Hg-0和Hg2 +的形式留在气相中，而余额保留在MEG解决方案中。发现该分布是高度pH依赖性的，并且当使用实验室级MEG溶液重复实验时未观察到该分布。这些发现有助于更好地理解在气体处理设施中进出MEG的汞种类和比例。 （C）2015 Elsevier Ltd.保留所有权利。

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  • 来源
    《Fuel》 |2015年第1期|917-924|共8页
  • 作者

    Sabri Y. M.; Ippolito S. J.; Tardio J.; Morrison P. D.; Bhargava S. K.;

  • 作者单位

    RMIT Univ, Sch Appl Sci, CAMIC, Melbourne, Vic 3001, Australia;

    RMIT Univ, Sch Appl Sci, CAMIC, Melbourne, Vic 3001, Australia;

    RMIT Univ, Sch Appl Sci, CAMIC, Melbourne, Vic 3001, Australia;

    RMIT Univ, Sch Appl Sci, Dept Appl Chem, Melbourne, Vic 3001, Australia;

    RMIT Univ, Sch Appl Sci, CAMIC, Melbourne, Vic 3001, Australia;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Monoethylene glycol (MEG); Mercury removal; Mercury partition; Speciation;

    机译：单乙二醇（MEG）;除汞;除汞;规格;

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