Eco-Friendly Deep Eutectic Solvents Blended with Diethanolamine Solution for Postcombustion CO₂ Capture

Abstract

Deep eutectic solvents (DESs) are the new generation of green promising CO 2 -capturing solvents, owing to their desirable properties, good stability, and environmentalfriendly features. In this study, a novel hybrid solvent has been developed based on DESs for CO 2 separation from a simulated flue gas flow. DESs: chlorine chloride (ChCl)-monoethanolamine (MEA), glyceline [1 ChCl/2 glycerol (Gly)], and piperazineactivated glyceline (glyceline/Pz) were added to the diethanolamine (DEA) solution in the concentration range of 10−30 wt %. The CO 2 absorption performances of the DES−DEA hybrid solvents were studied from the solubility and mass transfer points of view. Hydrodynamic studies revealed that the addition of DES results in a smaller bubble Sauter mean diameter. Moreover, partial replacement of water with ChCl-MEA or glyceline/Pz increased the CO 2 capture capacity, effective time, empirical enhancement factor, and overall mass transfer coefficient. On the contrary, with increasing glyceline concentration, the enhancement factor and overall mass transfer coefficient decreased under the studied operating conditions, although the CO 2 solubility did not change. Moreover, 13 C NMR analysis was used to characterize carbon-based species in DES−DEA systems before and after CO 2 absorption. Finally, the results of TGA measurements demonstrate that the addition of Gly-based DESs makes more stable hybrid solvents, which could be regenerated.

Cost and Heat Integration Analysis for CO2 Removal Using Imidazolium-Based Ionic Liquid-ASPEN PLUS Modelling Study

“…To fulfill this 1.5 • C target, carbon emissions must decrease by 7.6% each year between 2020 and 2030; in order to achieve the specific 2 • C benchmark, carbon emissions must drop by 2.7% per year between 2020 and 2030 [8]. As a result, finding a suitable technology to manage and reduce CO 2 emissions from anthropogenic sources is critical from both an environmental and economic standpoint [9]. Hence, renewable power sources that can mitigate CO 2 emissions, such as solar, wind, and hydropower, are some long-term alternatives to fossil fuels.…”

Supercritical CO2/Deep Eutectic Solvent Biphasic System as a New Green and Sustainable Solvent System for Different Applications: Insights from Molecular Dynamics Simulations

“…Considering that DESs are green and cheap alternatives to ILs, scCO 2 /ILs can be replaced by a scCO 2 /DES biphasic system to make a more industrially feasible and sustainable system. On the other hand, there are many reports addressing the solubility of CO 2 in DESs, which shows the possible formation of such a system. − Therefore, in this work, we have evaluated the possibility of scCO 2 /DES formation and the effects of this system on the DES solvent properties for the first time. Choline chloride: urea DES (reline) was chosen as the most famous DES .…”

Improved structure of Zr-BTC metal organic framework using NH2 to enhance CO2 adsorption performance

“…The significant contribution to such a severe rise is associated with the combustion of the fossil fuels, including petroleum, natural gas, and coal 1 . These days, carbon dioxide capture and storage (CCS) is a practical approach to reduce greenhouse gas emissions 2 , 3 .…”