An enormous increase in global energy demand has resulted in the increasing emissions of Carbon dioxide (CO₂) throughout the globe, and hence, the refinement of established technologies for the capture of CO₂ is of global interest. Currently, the absorption performed with chemical solvents, particularly alkanolamines and their blends, represents the most practical option. In general, the enhancement in absorption and regeneration capacities is targeted via the blending of several alkanolamines consisting of different functionalities to seek the absorption-favoured properties of individual amines. The present work considers blending of a tertiary alkanolamine, N,N-diethylethanolamine (DEEA) with a polyamine, triethylenetetramine (TETA). This blend has been envisaged to combine the high absorption capacity of TETA with high regeneration capacity of DEEA. The concentration of  DEEA and TETA in the blends is varied between 2.5-2.95 M and 0.05-0.5 M, respectively. The performance of these blends has been evaluated using an indigenous wetted-wall contactor. The CO₂ partial pressure was varied between 5-15 kPa and its effect on the CO₂ loading capacity and absorption flux for different compositions is evaluated in the temperature range of 30-50 . It is found that increasing the concentration of TETA increases the absorption drastically. Besides, the physical properties (density and viscosity) of these solvent systems have also been estimated.

中文翻译：

---

多胺促进的DEEA水溶液捕获二氧化碳的实验分析

全球能源需求的巨大增长导致全球二氧化碳（CO ₂）的排放量增加，因此，完善了用于捕获CO ₂的现有技术具有全球利益。当前，用化学溶剂，特别是链烷醇胺及其混合物进行吸收是最实用的选择。通常，通过混合几种由不同官能度组成的链烷醇胺来寻求吸收和再生能力的提高，以寻求各胺的有利于吸收的性能。本工作考虑将叔链烷醇胺N，N-二乙基乙醇胺（DEEA）与多胺三亚乙基四胺（TETA）混合。已经设想到这种混合物将TETA的高吸收能力与DEEA的高再生能力结合在一起。共混物中DEEA和TETA的浓度分别在2.5-2.95 M和0.05-0.5 M之间变化。这些掺混物的性能已使用本地湿壁接触器进行了评估。₂分压在5-15 kPa之间变化，并且在30-50的温度范围内评估了其对CO ₂负载量和吸收通量的影响。发现增加TETA的浓度可大大增加吸收。此外，还已经估计了这些溶剂体系的物理性质（密度和粘度）。