Oxidative degradation of monoethanolamine
Oxidative degradation of monoethanolamine
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DOI：
10.1021/ie010697c
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发表时间：
2002-08-21
影响因子：
4.2
通讯作者：
Rochelle, GT
中科院分区：
文献类型：
--
作者：
Chi, S;Rochelle, GT
在55 ℃下研究了单乙醇胺（MEA）的氧化降解，这是用于从烟道气中去除CO2的典型吸收剂。在用空气喷射的分批系统中连续测量NH3的释放速率，其指示总降解速率。在装有0.4摩尔CO2/摩尔MEA的MEA溶液中，溶解的铁（0.0001至1 mM）产生的氧化速率为0.37至2 mM/h。乙二胺四乙酸（EDTA）和N，N-双（2-羟乙基）甘氨酸有效地降低了40- 50%的铁存在下的氧化速率。亚铁引起的氧化在卸载MEA的化学计量从0.1到0.33摩尔NH3/摩尔Fe 2+。Fe 2+从0.0001到3.2 mM产生的速率从0.12到1.1 mM/h。铁没有出现在未加载的MEA中催化氧化。
Oxidative degradation of monoethanolamine (MEA) was studied at 55 degreesC, typical of absorbers for CO2 removal from flue gas. The rate of evolution of NH3, which was indicative of the overall rate of degradation, was measured continuously in a batch system sparged with air. Dissolved iron from 0.0001 to 1 mM yielded oxidation rates from 0.37 to 2 mM/h in MEA solutions loaded with 0.4 mol CO2/mol MEA. Ethylenediaminetetraacetic acid (EDTA) and N,N-bis(2-hydroxyethyl)glycine effectively decreased the rate of oxidation in the presence of iron by 40-50%. Ferrous caused oxidation in unloaded MEA with stoichiometry from 0.1 to 0.33 mol NH3/mol Fe2+. Fe2+ from 0.0001 to 3.2 mM yielded rates from 0.12 to 1.1 mM/h. Ferric did not appear to catalyze oxidation in unloaded MEA.