Direct Determination of the Rate Coefficient for the Reaction of OH Radicals with Monoethanol Amine (MEA) from 296 to 510 K.
Direct Determination of the Rate Coefficient for the Reaction of OH Radicals with Monoethanol Amine (MEA) from 296 to 510 K.
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DOI：
10.1021/jz300200c
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发表时间：
2012-03
期刊：
影响因子：
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通讯作者：
L. Onel;M. Blitz;P. Seakins
中科院分区：
文献类型：
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作者：
L. Onel;M. Blitz;P. Seakins
单乙醇胺（H2 NCH 2CH 2 OH，MEA）已被提议用于碳捕获和储存的大规模使用。我们提出了第一个绝对的，依赖于温度的确定的速率系数的反应OH与MEA使用激光闪光光解OH生成，监测OH去除激光诱导荧光。室温速率系数为（7.61 ± 0.76）× 10（-11）cm（3）molecule（-1）s（-1），到510 K时，速率系数下降约40%。速率系数与温度的关系式为k_1 =（7.73 ± 0.24）× 10 ~（-11）（T/295）（-（0.79±0.11））cm ~（-3）molecule ~（-1）s ~（-1）。高速率系数表明，大气中的气相处理将与气溶胶的吸收竞争。
Monoethanol amine (H2NCH2CH2OH, MEA) has been proposed for large-scale use in carbon capture and storage. We present the first absolute, temperature-dependent determination of the rate coefficient for the reaction of OH with MEA using laser flash photolysis for OH generation, monitoring OH removal by laser-induced fluorescence. The room-temperature rate coefficient is determined to be (7.61 ± 0.76) × 10(-11) cm(3) molecule(-1) s(-1), and the rate coefficient decreases by about 40% by 510 K. The temperature dependence of the rate coefficient is given by k1= (7.73 ± 0.24) × 10(-11)(T/295)(-(0.79±0.11)) cm(3) molecule(-1) s(-1). The high rate coefficient shows that gas-phase processing in the atmosphere will be competitive with uptake onto aerosols.