Products and process variables in oxidation of monoethanolamine for CO2 capture
Products and process variables in oxidation of monoethanolamine for CO2 capture
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DOI：
10.1016/j.ijggc.2012.11.017
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发表时间：
2013
影响因子：
3.9
通讯作者：
Alexander Voice;G. Rochelle
中科院分区：
文献类型：
--
作者：
Alexander Voice;G. Rochelle
采用两种不同的设备和不同的实验条件，研究了co2捕集系统中单乙醇胺（MEA）的氧化降解。溶解的铁、锰和铜都是有效的催化剂，可以将氧化速率提高10倍。氧化速率的活化能为68 ~ 70kj /mol。向气体中加入2%的二氧化碳使氧化作用增加了五倍。发现氧化速率在氧分压下近似为一级。反应器气体中添加50ppm的no2或so2对降解率的影响最小。高气流量时，质量平衡在5%以内，低气流量时，质量平衡在20%以内。两个系统中三分之二的降解MEA转化为氨。其他主要产品有1-（2-羟乙基）-甲酰胺（HEF）和1-（2-羟乙基）-咪唑（HEI）。
Oxidative degradation of monoethanolamine (MEA) in CO2capture systems was studied using two different apparatuses and a variety of experimental conditions. Dissolved iron, manganese, and copper were all potent catalysts, increasing the oxidation rate by up to a factor of ten. The activation energy of the oxidation rate was 68–70kJ/mol. Addition of 2% CO2to the gas increased oxidation by a factor of five. The oxidation rate was found to be approximately first-order in oxygen partial pressure. Addition of 50ppm NO2or SO2to the reactor gas had a minimal effect on the degradation rate. The mass balance was closed within 5% at high gas flow and within 20% at low gas flow. Two-thirds of the degraded MEA in both systems was converted to ammonia. Other major products were 1-(2-hydroxyethyl)-formamide (HEF) and 1-(2-hydroxyethyl)-imidazole (HEI).