The behavior of mercury in water, alcohols, monoethylene glycol and triethylene glycol II. Elemental mercury solubility in alcohols, ethers and acetone; gas plant mercury distribution; and speciation in monoethylene glycol solution

摘要

This short communication provides elemental mercury equilibrium solubilities in 1-hexanol, 1-decanol, 2-propanone (acetone), 2-[(propan-2-yl)oxy]propane (diisopropyl ether), and 1-butoxybutane (dibutyl ether) over the approximate temperature range, 255-333 K. Exponential expressions of the solubility are presented in the form: Solubility (ng/g) = Ae(xt), where t is in degrees C. In a low temperature separator at a gas field, mercury partitioning has been modelled. At separator temperature and pressure conditions of 263-267 K and 2600-3100 kPa, similar to 94 wt% of the mercury is calculated to report to the vapor phase, whilst similar to 3 wt% each reports to the condensate and aqueous phases. The aqueous phase consists of H2O-rich monoethylene glycol (36 wt% MEG) used to inhibit gas hydrate formation. Sampling and analysis show that the H2O-rich and H2O-lean MEG streams contain predominantly particulate mercury. The use of this technical information is critical to planning for mercury removal, decontamination and waste minimization. (C) 2018 Elsevier B.V. All rights reserved.