Degradation of aqueous diethanolamine solutions by carbon disulfide

Gas Separation & Purification Pub Date : 1996-01-01 DOI:10.1016/0950-4214(95)00012-7

Olukayode Fatai Dawodu , Axel Meisen

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引用次数: 23

Abstract

The degradation of aqueous diethanolamine (DEA) solutions by carbon disulfide (CS₂) was investigated using a batch reactor at temperatures ranging from 120 to 190 °C, DEA concentrations of 2 to 6 M and $CS_{2} DEA$ mole ratios of 0.05 to 0.23. Reaction products identified by gas chromatography (GC), gas chromatography/mass spectrometry (GC/MS), melting point determination, elemental analysis and infrared analysis include monoethanolamine, bis(hydroxyethyl)-ethylenediamine, bis(hydroxyethyl)-piperazine, hydroxyethyl-oxazolidone, hydroxyethyl-imidazolidone, tris(hydroxyethyl)-ethylenediamine, bis(hydroxyethyl)-imidazolidone and an insoluble, sulfur-rich, linear, polymeric solid. The formation of the products increased with temperature, DEA concentration and $CS_{2} DEA$ mole ratio. A mechanism for the formation of the products is presented, and the experimental data are consistent with a first-order overall reaction with respect to DEA.

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二硫化碳对二乙醇胺水溶液的降解作用

采用间歇式反应器，研究了二硫化碳(CS2)在120 ~ 190℃、浓度为2 ~ 6 M、CS2DEA摩尔比为0.05 ~ 0.23的条件下对二乙醇胺(DEA)水溶液的降解效果。通过气相色谱(GC)、气相色谱/质谱(GC/MS)、熔点测定、元素分析和红外分析鉴定的反应产物包括单乙醇胺、双(羟乙基)-乙二胺、双(羟乙基)-哌嗪、羟乙基-恶唑酮、羟乙基-咪唑酮、三(羟乙基)-乙二胺、双(羟乙基)-咪唑酮和一种不溶性、富硫的线性聚合物固体。产物的生成随温度、DEA浓度和CS2DEA摩尔比的增加而增加。给出了产物的形成机理，实验数据与DEA的一级全反应相一致。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Gas Separation & Purification

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