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首页> 外文期刊>International Journal of Greenhouse Gas Control >Comprehensive monitoring of MEA degradation in a post-combustion CO2 capture pilot plant with identification of novel degradation products in gaseous effluents
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Comprehensive monitoring of MEA degradation in a post-combustion CO2 capture pilot plant with identification of novel degradation products in gaseous effluents

机译：燃烧后二氧化碳捕集试验工厂中MEA降解的全面监测，并鉴定出气态废水中的新型降解产物

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A pilot plant campaign was performed to study MEA degradation in CO2 capture conditions and anticipate potential degradation products emissions to the atmosphere in industrial case. Aqueous 30% wt MEA was cycled between absorption and regeneration steps during 1700 h in the presence of a synthetic flue gas containing 81% of N-2,14% of CO2, 5% of 02,97 ppm of NO, 9 ppm of SO2 and 5 ppm of NO2. Specific methods (sampling, sample conditioning and analysis) were developed to improve degradation products identification and to provide a quantification of targeted compounds in liquid phase and above all in absorber and stripper gas effluents. Especially, trace elements were detected in liquid phase thanks to Head Space Solid Phase MicroExtraction (HS-SPME) and liquid-liquid extraction with ChemElut cartridges and in gas phase thanks to adsorbent tubes of different type: Sep-Pak for aldehydes and ketones, Orbo 60 for N-nitrosodimethylamine, Tenax and active charcoal for non-specific adsorption. 32 degradation products were identified in liquid phase and 38 in gas phase, 17 of which for the first time, especially derivatives of pyridine and oxazolidine, 1H-pyrrole and a new nitrosamine, the N-nitroso-2-methyl-oxazolidine. (C) 2016 Elsevier Ltd. All rights reserved.
机译：开展了一项试点工厂活动，以研究在CO2捕集条件下MEA的降解，并预测工业案例中向大气排放的潜在降解产物。在含有81％N-2,14％CO2、5％02.97 ppm NO，9 ppm SO2的合成烟气存在下，在吸收和再生步骤之间，在吸收和再生步骤之间循环30％wt MEA水溶液和5 ppm的NO2。开发了特定的方法（采样，样品处理和分析）以改善降解产物的鉴定，并定量分析液相的目标化合物，尤其是吸收塔和汽提塔废气中的目标化合物。尤其是，通过顶空固相微萃取（HS-SPME）和ChemElut柱进行液-液萃取，可以在液相中检测到痕量元素;而通过不同类型的吸附剂管，可以在气相中检测到微量元素：用于醛和酮的Sep-Pak，Orbo 60用于N-亚硝基二甲胺，Tenax和活性炭，用于非特异性吸附。在液相中鉴定出32种降解产物，在气相中鉴定出38种，其中首次鉴定出17种，尤其是吡啶和恶唑烷，1H-吡咯和新的亚硝胺的衍生物，即N-亚硝基-2-甲基-恶唑烷。 （C）2016 Elsevier Ltd.保留所有权利。

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