Review and Perspectives of CO<sub>2</sub> Absorption by Water- and Amine-Based Nanofluids
Cuiting Yuan, Yan Wang, Francisco M. Baena‐Moreno, Zhen Pan, Rui Zhang, Hui Zhou, Zhien Zhang
Abstract
The emission of greenhouse gases, especially CO 2, has become a major cause of environmental degradation, and carbon capture, utilization, and storage (CCUS) is a proposed solution to mitigate its impact. Nanofluids, a relatively new method for CO 2 absorption, have gained attention in recent years. This review focuses on conventional methods for preparing nanofluids along with techniques to improve their stability and enhance the CO 2 absorption and desorption mechanisms. Additionally, the influences of factors, i.e., nanoparticle and base solution types as well as nanoparticle concentration, on the CO 2 absorption process are summarized. Furthermore, models that can predict the absorption of CO 2 accurately are outlined. It is found that the types of both base liquids and nanoparticles have an important impact on the absorption by nanofluids. In-depth studies on the predictive capabilities of artificial intelligence (AI) models hold immense potential in this regard. This review also puts forth effective strategies to address prevailing challenges. This will provide a solid theoretical basis for this field and underscore the promising potential of nanofluids as CO 2 solvents. There are still many unexplored aspects to be considered, such as the economic viability and energy consumption of this technology.