Work

The investigation of the reaction mechanism of CO2 in HMDA/DEEA and EAE/1DMA2P aqueous solution systems

Year: 2025

Type: article

Abstract: Revealing the reaction mechanism of CO 2 absorption by mixed amine solutions can provide theoretical guidance for establishing complex kinetic models. This study investigates the CO 2 capture mechanisms of blended amine systems, specifically 1,6-hexamethyl diamine (HMDA)-N,N-diethylethanolamine (DEEA) and 2-(ethylamino)ethanol(EAE)-1-dimethylamino-2-propanol (1DMA2P), utilizing 13 C nuclear magnetic resonance (NMR) spectroscopy and quantum mechanical calculations. The 13 C NMR analysis identified the formation and conversion of species during CO 2 absorption, while quantum calculations elucidated the reaction energetics. The results indicate that tertiary amines (DEEA or 1DMA2P) facilitate CO 2 absorption by promoting the desorption of protonated primary amines (HMDA or EAE), thereby enhancing the absorption rate. This research provides insights into the role of tertiary amines in blended systems, guiding the development of efficient and low-energy amine solvents for CO 2 capture.

Source: Green Chemical Engineering

DOI: 10.1016/j.gce.2025.06.003

Authors: Can Lv, Yimin Deng, Dongfang Zhao, Miyi Li, Helei Liu

Institution: Beijing Institute of Technology

Language: English

Topic: Carbon Dioxide Capture Technologies

Subfield: Mechanical Engineering

Field: Engineering

Domain: Physical Sciences

SDG: Climate action

Open Access status: diamond

Funders: National Natural Science Foundation of China, Beijing Institute of Technology, National Key Research and Development Program of China