The utilization of fossil fuels to satisfy our growing energy and nonenergy needs is resulting in a significant release of anthropogenic CO₂ emissions. The capture of carbon dioxide (and its utilization and sequestration) plays a crucial role in the decarbonizing economy. In this study, we report the application of an aqueous amino acid (l-valine) as a sustainable green solution for CO₂ capture at ambient temperature (298.15 K) and pressure of 1.3 Mpa. We studied the process of CO₂ capture in a high-pressure setup equipped with a complete data acquisition system to monitor and record the pressure and temperature in real-time. Each experiment was done thrice to determine the saturation (carbon dioxide uptake capacity) along with the feasibility of designing a continuous process. Further, the samples were characterized by FTIR-ATR and UV spectroscopy to understand the mechanism of CO₂ uptake and the formation of various reactive intermediates. Additionally, the experimental data were analyzed for the validation of gas uptake in the system by an exponential curve fitting model to study absorption as well as Langmuir and Freundlich isotherms for adsorption. To interpret the impact of mass transfer on CO₂ uptake, a common surfactant, sodium dodecyl sulfate (SDS), in a small quantity was utilized, and the obtained results are reported.

中文翻译：

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水性左旋缬氨酸中的绿色和可持续二氧化碳捕集：工业应用过程效率和气体吸收的实验研究

利用化石燃料来满足我们不断增长的能源和非能源需求导致了人为CO ₂排放的大量释放。二氧化碳的捕获（及其利用和封存）在脱碳经济中发挥着至关重要的作用。在这项研究中，我们报道了氨基酸水溶液（l-缬氨酸）作为一种可持续的绿色溶液在环境温度（298.15 K）和1.3 Mpa压力下捕获CO _{2的应用。}我们研究了高压装置中CO ₂捕获的过程，该装置配备了完整的数据采集系统，可以实时监测和记录压力和温度。每个实验进行三次以确定饱和度（二氧化碳吸收能力）以及设计连续过程的可行性。此外，通过 FTIR-ATR 和紫外光谱对样品进行了表征，以了解 CO ₂吸收的机制和各种反应中间体的形成。此外，通过指数曲线拟合模型分析实验数据以验证系统中的气体吸收，以研究吸收以及朗缪尔和弗罗因德利希吸附等温线。_{为了解释传质对CO 2}吸收的影响，使用了少量的常见表面活性剂十二烷基硫酸钠(SDS)，并报告了所获得的结果。