Post-combustion CO₂ capture process using amine solvents is limited by the high energy penalty and the irreversible degradation of amines. The present work aimed at studying the degradation of the innovative blend 1-methylpiperazine/piperazine (1MPZ/PZ: 30/10%wt.) in a lab-scale pilot plant, LEMEDES-CO2, with conditions representative of post-combustion CO₂ capture for power generation. Degradation of the solvent was realized twice during 800 and 955 h. Addition of acidic impurities (H₂SO₃ and HNO₃) in the second campaign was performed in order to study their impact on the solvents degradation. CO₂ loadings were determined and showed an average value of 0.28 for the lean solvent and 0.63 for the rich solvent. In order to identify and quantify degradation products, complementary analytical strategies were developed involving LC–MS, ionic chromatography and GC–MS. In order to monitor the gaseous effluents, a sampling on solid sorbents (Tenax^® TA) was performed followed by thermodesorption and GC–MS analysis. This study permitted the identification of 23 degradation products in the liquid phase of the solvent, and 16 emitted with the treated flue gas. Among them were found piperazine derivatives, alkylpyrazines and organic acids. Quantification was performed on both liquid and gaseous phases on 10 selected compounds.

使用胺溶剂的燃烧后CO ₂捕集过程受到高能量损失和胺的不可逆降解的限制。本工作旨在研究在实验室规模的中试工厂LEMEDES-CO2中具有代表性燃烧后CO _2的条件下，创新混合物1-甲基哌嗪/哌嗪（1MPZ / PZ：30/10％wt。）的降解。捕获发电。在800和955小时内两次实现了溶剂的降解。为了研究它们对溶剂降解的影响，在第二步中进行了酸性杂质（H ₂ SO ₃和HNO ₃）的添加。一氧化碳₂确定了负载量，对于贫溶剂，平均值显示为0.28，对于富溶剂，平均值为0.63。为了鉴定和量化降解产物，开发了包括LC-MS，离子色谱和GC-MS在内的补充分析策略。为了监测的气态流出物，在固体吸附剂的采样（的Tenax ^® TA）进行，接着热解吸和GC-MS分析。该研究允许鉴定溶剂液相中的23种降解产物，以及经处理的烟道气排放的16种降解产物。其中发现了哌嗪衍生物，烷基吡嗪和有机酸。在10种选定的化合物的液相和气相上均进行了定量。