Solubilities of Ammonia in Polyethylene Glycols at 298.2–353.2 K and 0–200 kPa,Journal of Chemical & Engineering Data

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Solubilities of Ammonia in Polyethylene Glycols at 298.2–353.2 K and 0–200 kPa
Journal of Chemical & Engineering Data ( IF 2.0 ) Pub Date : 2019-12-18 , DOI: 10.1021/acs.jced.9b00779
Jian-Bo Zhang ₁ , Kuan Huang ₁

Affiliation

Polyethylene glycols (PEGs) are potential solvents for NH₃ capture, considering that they have abundant hydroxyl groups, which can form hydrogen-bond interaction with NH₃. To this end, the solubilities of NH₃ in PEGs with average molecular weights of 100–600 g·mol^–1 were measured at 298.2–353.2 K and 0–200 kPa in the present work. It is found that the solubilities of NH₃ increase linearly with the increase of pressures, but decrease with the increase of temperatures. In addition, the solubilities of NH₃ show negative dependence on the molecular weights of PEGs, because PEGs with higher molecular weights exhibit lower hydroxyl densities. The Henry’s constants and enthalpy changes for NH₃ absorption in PEGs were also calculated based on the variations of NH₃ solubilities with pressures and temperatures. Furthermore, the physical properties of PEGs that are essential for NH₃ absorption such as densities and surface tensions were also measured at 293.2–353.2 K in the present work.

中文翻译：

氨在298.2–353.2 K和0–200 kPa时在聚乙二醇中的溶解度

考虑到聚乙二醇（PEG）具有丰富的羟基，可以与NH ₃形成氢键相互作用，因此它们是捕获NH _3的潜在溶剂。为此，在目前的工作中，测得平均分子量为100–600 g·mol ^–1的PEG中NH ₃的溶解度为298.2–353.2 K和0–200 kPa。发现NH ₃的溶解度随着压力的增加而线性增加，但是随着温度的增加而减少。此外，NH ₃的溶解度由于分子量较高的PEG的羟基密度较低，因此对PEG的分子量显示出负相关性。还基于NH ₃溶解度随压力和温度的变化，计算了PEG中NH ₃吸收的亨利常数和焓变。此外，在目前的工作中，也测量了对NH ₃吸收至关重要的PEG的物理性质，例如密度和表面张力，其密度为293.2–353.2K。

更新日期：2019-12-19

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