Application of Nanofluids in CO2 Absorption: A Review

Abstract

The continuous release of CO2 into the atmosphere as a major cause of increasing global warming has become a growing concern for the environment. Accordingly, CO2 absorption through an approach with maximum absorption efficiency and minimum energy consumption is of paramount importance. Thanks to the emergence of nanotechnology and its unique advantages in various fields, a new approach was introduced using suspended particles in a base liquid (suspension) to increase CO2 absorption. This review article addresses the performance of nanofluids, preparation methods, and their stability, which is one of the essential factors preventing sedimentation of nanofluids. This article aims to comprehensibly study the factors contributing to CO2 absorption through nanofluids, which mainly addresses the role of the base liquids and the reason behind their selection.

Review and Perspectives of CO2 Absorption by Water- and Amine-Based Nanofluids

“…Therefore, in addition to water-based nanofluids, a large number of scholars have applied amine-based nanofluids to the CO 2 absorption process in recent years. ,, The number of amine molecules substituted by hydrogen atoms in other functional groups in the amine solutions is the criterion for classifying the amine solution. The first one is a primary amine solution including MEA; the second is a secondary amine solution including DEA; and the third is a tertiary amine solution including MDEA. , In addition to these, there were also sterically hindered amines including AMP. MEA solutions are often the solvent of choice for large-scale applications in power plants .…”

“…The first one is a primary amine solution including MEA; the second is a secondary amine solution including DEA; and the third is a tertiary amine solution including MDEA. 108,109 In addition to these, there were also sterically hindered amines including AMP. MEA solutions are often the solvent of choice for large-scale applications in power plants.…”

Experimental Investigation of the Influence of Nanofluids on the Wetting of Membrane Contactors in the CO2 Capture Process

“…The second depends upon the heat transfer mechanism. 2 The effect of the adsorbent temperature for nanofluids with different concentrations of NPs on the CO 2 absorption performance is shown in Figure 10. The results show that increasing the adsorbent temperature increases the absorption efficiency for both base fluid and nanofluid.…”

Carbon Capture Enhancement by Water‐Based Nanofluids in a Hollow Fiber Membrane Contactor

“…Since the concept of nanofluid has been proposed, nanofluids have been practically applied in many fields such as mechanical processing, solar heat collection, fuel cells, wastewater treatment, and crude oil recovery. [21] However, they are still in the stage of laboratory research in terms of gas absorption and have no practical application. [22] Therefore, the simulation research on using nanofluids for absorbing acid gases [23][24][25] is very important.…”