The heat of absorption is an important parameter that affects the CO₂ absorption and stripping performance of amine-based CO₂ capture. The present paper aims at development of the experimental method of determining the heat of absorption using a batch reaction calorimetry. A prospective high‐capacity CO₂‐capturing solvent based on an aqueous solution of N,N-diethylethanolamine (DEEA) blended with small concentrations of 3-(methyloamino)propylamine (MAPA) is therefore studied. The differential and integral heat of absorption of CO₂ was measured at 40 °C and 60 °C using single DEEA and amine blends. Experiments show that the heat of absorption in DEEA and DEEA + MAPA blends depends both on loading and temperature, though the temperature dependency is not as high as reported earlier. Increasing the MAPA/DEEA concentration ratio increased the heat of absorption in the amine blends.

吸收热是影响胺基CO ₂捕集的CO ₂吸收和汽提性能的重要参数。本文旨在开发一种使用间歇反应量热法测定吸收热的实验方法。因此，研究了一种基于N，N-二乙基乙醇胺（DEEA）与少量浓度的3-（甲氨基氨基）丙胺（MAPA）混合的高容量CO ₂捕获溶剂。吸收CO ₂的微分和积分热使用单一的DEEA和胺类混合物在40°C和60°C下测量。实验表明，DEEA和DEEA + MAPA共混物中的吸收热取决于载荷和温度，尽管温度依赖性不如先前报道的高。增加MAPA / DEEA的浓度比会增加胺共混物中的吸收热。