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Salt Solubility and Saturated Electrical Conductivity Data for Water + Monoethylene Glycol + NaCl in a Wide Temperature Range
Journal of Chemical & Engineering Data ( IF 2.6 ) Pub Date : 2021-03-08 , DOI: 10.1021/acs.jced.0c00975 Mateus F. Monteiro 1 , Mario H. Moura-Neto 1 , André L. N. Mota 2 , Camila S. Figueiredo 3 , João R. P. Ciambelli 3 , Jailton F. do Nascimento 3 , Leonardo S. Pereira 3 , Osvaldo Chiavone-Filho 1
Journal of Chemical & Engineering Data ( IF 2.6 ) Pub Date : 2021-03-08 , DOI: 10.1021/acs.jced.0c00975 Mateus F. Monteiro 1 , Mario H. Moura-Neto 1 , André L. N. Mota 2 , Camila S. Figueiredo 3 , João R. P. Ciambelli 3 , Jailton F. do Nascimento 3 , Leonardo S. Pereira 3 , Osvaldo Chiavone-Filho 1
Affiliation
Monoethylene glycol (MEG) is used to prevent hydrate formation in subsea pipelines of natural gas production. MEG is recovered at an offshore regeneration unit. Sodium chloride is the predominant salt in the water–MEG streams. Thus, knowledge of NaCl solubilities in the process conditions is relevant for the design and operation of a MEG regeneration unit. Six isotherms of NaCl solubility were measured (76 data points) from T = (293.15 to 403.15) K in the whole solvent concentration range. The analytical method for salt solubility was based on the reproducibility of the concentration of two successive samples. Density measurements were accurately applied for these analyses. The temperature dependence on NaCl solubility is relatively weak. A reverse behavior with increasing temperature was observed for MEG contents higher than 90 wt %. Salt solubilities were successfully correlated with Redlich–Kister expansion (AADwNaCl = 0.0006 and ΔwNaCl = 0.47%). Electrical conductivity of NaCl-saturated solutions were measured (44 data points) at T = (293.15 to 363.15) K and correlated with a semiempirical model. A large difference in electrical conductivity for the two solvents was observed. The correlation adequately represented the data set (AADκ = 5.67 mS·cm–1 and Δκ = 5.94%). NaCl solubilities and electrical conductivities were accurately determined and are useful for the MEG regeneration process.
中文翻译:
宽温度范围内的水+单乙二醇+氯化钠的盐溶解度和饱和电导率数据
单乙二醇(MEG)用于防止天然气生产的海底管道中形成水合物。MEG在近海再生装置中回收。氯化钠是水– MEG物流中的主要盐。因此,对于工艺条件中NaCl溶解度的了解与MEG再生装置的设计和操作有关。从T测量了六个NaCl溶解度等温线(76个数据点)=(293.15至403.15)K在整个溶剂浓度范围内。盐溶解度的分析方法基于两个连续样品的浓度重现性。密度测量被准确地应用于这些分析。温度对NaCl溶解度的依赖性相对较弱。对于高于90重量%的MEG含量,观察到随着温度升高的相反行为。盐溶解度与Redlich-Kister膨胀成功相关(AAD w NaCl = 0.0006和Δw NaCl = 0.47%)。在T处测量NaCl饱和溶液的电导率(44个数据点)=(293.15至363.15)K,并与半经验模型相关。观察到两种溶剂的电导率差异很大。相关性足以代表数据集(AADκ= 5.67 mS·cm –1,Δκ= 5.94%)。准确确定了NaCl的溶解度和电导率,可用于MEG再生过程。
更新日期:2021-04-08
中文翻译:
宽温度范围内的水+单乙二醇+氯化钠的盐溶解度和饱和电导率数据
单乙二醇(MEG)用于防止天然气生产的海底管道中形成水合物。MEG在近海再生装置中回收。氯化钠是水– MEG物流中的主要盐。因此,对于工艺条件中NaCl溶解度的了解与MEG再生装置的设计和操作有关。从T测量了六个NaCl溶解度等温线(76个数据点)=(293.15至403.15)K在整个溶剂浓度范围内。盐溶解度的分析方法基于两个连续样品的浓度重现性。密度测量被准确地应用于这些分析。温度对NaCl溶解度的依赖性相对较弱。对于高于90重量%的MEG含量,观察到随着温度升高的相反行为。盐溶解度与Redlich-Kister膨胀成功相关(AAD w NaCl = 0.0006和Δw NaCl = 0.47%)。在T处测量NaCl饱和溶液的电导率(44个数据点)=(293.15至363.15)K,并与半经验模型相关。观察到两种溶剂的电导率差异很大。相关性足以代表数据集(AADκ= 5.67 mS·cm –1,Δκ= 5.94%)。准确确定了NaCl的溶解度和电导率,可用于MEG再生过程。