Experimental study of carbon dioxide absorption by Fe2O3@glutamine/NMP nanofluid

Abstract

In this study, the magnetic based nanoparticle (NP) of Fe 2 O 3 @glutamine (C 5 H 10 N 2 O 3 ) was synthesized to improve the Fe 2 O 3 properties in absorbing carbon dioxide (CO 2 ) using the base uid of hydrous N-Methyl-2-pyrrolidone (NMP) solution (50wt.%), as a physically powerful CO 2 absorbent. To do this, several nano-NMP solutions, in different weight percentages of NPs were rst prepared. Then, in a batch setup, the nano-NMP solutions were directly exposed to CO 2 gaseous (at the pressures of 20, 30, and 40 bar) to clarify the effects of the mass percentage of NPs and initial pressure on CO 2 absorption. Results clearly illustrated that Fe 2 O 3 nano uid was not stable more than 0.025 wt.%. However, Fe 2 O 3 @glutamine nano uid was stable approximately two times more than Fe 2 O 3 nano uid due to the presence of glutamine as a hydrophilic agent in the structure of Fe 2 O 3 @glutamine. Moreover, in comparison to the base uid (NMP solution), although Fe 2 O 3 increased CO 2 absorption up to 9.14%, Fe 2 O 3 @glutamine NPs caused the CO 2 absorption to increase up to 19.41%, which can be determined as the chemical reactions of two amino groups in the glutamine structure with CO 2 and also higher Stability of Fe 2 O 3 @glutamine NPs compared to bare Fe 2 O 3 NPs.

Identification of Nano-Metal Oxides That Can Be Synthesized by Precipitation-Calcination Method Reacting Their Chloride Solutions with NaOH Solution and Their Application for Carbon Dioxide Capture from Air—A Thermodynamic Analysis

“…The above is confirmed for M(x) = Fe(II), Zn(II), La(III), Ce (III) and Sn(II) under 150 bar in [ 92 , 93 , 94 , 95 , 96 ]. Further, CaO [ 71 , 97 , 98 , 99 , 100 ], BeO [ 64 ], Co 3 O 4 [ 101 ], MgO [ 102 , 103 ], FeO, Fe 2 O 3 , Fe 3 O 4 [ 104 ], Li 2 O [ 66 , 105 ], CuO [ 106 , 107 ] and NiO [ 108 ] were used as sorbents in a CO 2 environment.…”

Highly Selective Physical/Chemical CO2 Separation by Functionalized Fe3O4 Nanoparticles in Hollow Fiber Membrane Contactors: Experimental and Modeling Approaches

“…Also, the Brugapur de oiled lecithin (BDOL) surfactant was used with the ratio of 1:1 to improve the stability of NPs. Zeta potential analysis is a suitable technique to investigate the stability of nanodispersions, which was used in many research studies. ,,, Overall, the absolute zeta potential of more than 30 mV indicates a stable nanodispersion, that between 20 and 30 mV shows a semistable nanodispersion, and that of less than 20 mV reveals an unstable nanodispersion. ,− The results of zeta potential analysis are listed in Table .…”

“…The produced charge can form a hydrogen bond with water, which favors deprotonation of a CO 2 -amino acid complex and facilitation of carbamate. Therefore, chemical CO 2 absorption can occur, which is due to the presence of nitrogen groups in the structures of amino acids, acting as a base group to accept protons and form carbamate. , Eventually, the nanodispersions of Fe3O4, Fe3O4-P, Fe3O4-L, Fe3O4@SiO2-P, and Fe3O4@SiO2-L increased the separation performance of DW of up to 27.5, 57.14, 64.28, 72.85, and 96.42%, respectively.…”

“…Therefore, chemical CO 2 absorption can occur, which is due to the presence of nitrogen groups in the structures of amino acids, acting as a base group to accept protons and form carbamate. 54,63 Eventually, the nanodispersions of Fe3O4, Fe3O4-P, Fe3O4-L, Fe3O4@SiO2-P, and Fe3O4@SiO2-L increased the separation performance of DW of up to 27.5, 57.14, 64.28, 72.85, and 96.42%, respectively. It is worth mentioning that the better CO 2 absorption performance of lysine compared to proline can be explained by its amine number.…”