Kinetics of the oxidative degradation of aqueous monoethanolamine in a flue gas treating unit
Kinetics of the oxidative degradation of aqueous monoethanolamine in a flue gas treating unit
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DOI：
10.1021/ie000957a
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发表时间：
2001-07
影响因子：
4.2
通讯作者：
T. Supap;R. Idem;A. Veawab;A. Aroonwilas;P. Tontiwachwuthikul;A. Chakma;B. Kybett
中科院分区：
文献类型：
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作者：
T. Supap;R. Idem;A. Veawab;A. Aroonwilas;P. Tontiwachwuthikul;A. Chakma;B. Kybett
在300 mL高压釜中，在温度393-443 K，单乙醇胺（MEA）浓度2-11 kmol/m3，氧压241-345 kPa（即，O 2浓度范围）。结果表明，MEA氧化降解的本征动力学模型为：-rMEA = 250000 exp（-66288.9/RT）[MEA] [O2]，它与O2浓度、MEA初始浓度以及温度有关。这项工作代表了第一次尝试在获得的MEA的氧化降解的内在动力学数据和制定的动力学模型，适合的数据的基础上的初始速率。MEA和O 2的反应顺序得到的值意味着MEA的氧化降解是更敏感的O 2浓度比MEA浓度的增加。它还表明，即使实验条件使模型的反应作为一个均匀的液相反应，MEA氧化降解本身不是一个基本的反应。
An investigation of the kinetics of the oxidative degradation of aqueous monoethanolamine (MEA) was conducted in a 300-mL autoclave in the temperature range 393-443 K and MEA concentration range 2-11 kmol/m 3 at 241-345 kPa O 2 pressure (i.e., O 2 concentration range). The results show that MEA oxidative degradation depends on both the O 2 and the initial MEA concentrations, as well as the temperature, according to the intrinsic kinetic model: -r MEA =250000exp(-66288.9/RT)[MEA] [O 2 ]. This work represents the first attempt at both obtaining intrinsic kinetic data for the oxidative degradation of MEA and formulating a kinetic model that fits the data based on the initial rate. The values obtained for the reaction orders for MEA and O 2 imply that oxidative degradation of MEA is more sensitive to increases in the O 2 concentration than in the MEA concentration. It also shows that, even though the experimental conditions enabled to model the reaction as a homogeneous liquid-phase reaction, MEA oxidative degradation itself is not an elementary reaction.