New Amines for CO2 Capture. I. Mechanisms of Amine Degradation in the Presence of CO2
New Amines for CO2 Capture. I. Mechanisms of Amine Degradation in the Presence of CO2
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DOI：
10.1021/ie900472x
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发表时间：
2009-10-21
影响因子：
4.2
通讯作者：
Carrette, Pierre-Louis
中科院分区：
文献类型：
--
作者：
Lepaumier, Helene;Picq, Dominique;Carrette, Pierre-Louis
12种不同的胺与CO2的降解在100 mL不锈钢间歇反应器中在140 ℃下使用4 mol . kg（-1）胺溶液和2 MPa的CO2压力。在运行结束时，通过气相色谱（GC）/质谱（MS）鉴定了大部分降解产物;用定量GC方法测定了起始胺及其降解产物的量。本工作比较了具有一个或两个羟基的乙醇胺（包括MEA）的降解与乙二胺的降解。选择它们来建立胺结构和稳定性之间的关系：一个醇官能团被一个胺官能团取代，胺官能团性质的影响，空间位阻和环状结构的影响。观察到显著差异。描述了主要的降解产物，并提出了一些机制来解释它们的形成。
Degradation of 12 different amines with CO2 was evaluated in 100 mL stainless steel batch reactors for 15 days at 140 degrees C using a 4 mol . kg(-1) amine solution and a CO2 pressure of 2 MPa. At the end of the run, most of degradation products were identified by gas chromatography (GC)/mass spectrometry (MS); amounts of starting amine and its degradation products were determined with a quantitative GC method. This work compares the degradation of ethanolamines (including MEA) having one or two hydroxyl groups with the degradation of ethylenediamines. They were chosen to establish relationships between amine structure and stability properties: replacement of one alcohol function by one amine function, effect of amine function nature, impact of steric hindrance and cyclic structure. Significant differences were observed. The main degradation products are described, and some mechanisms are proposed to explain their formation.