Enhanced CO 2 capture efficiency applying amine-based nano magnetite/sulfinol-M nano solvents at high pressures
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RESEARCH ARTICLE
Enhanced CO2 capture efficiency applying amine-based nano magnetite/sulfinol-M nano solvents at high pressures Abbas Elhambakhsh 1 & Peyman Keshavarz 1 Received: 31 May 2020 / Accepted: 6 September 2020 # Springer-Verlag GmbH Germany, part of Springer Nature 2020
Abstract Recently, extensive researches were performed on carbon dioxide (CO2) capture using nano solvents. In this study, three different modified magnetic nanoparticles (NPs), including Fe3O4-Proline (Fe3O4-P), Fe3O4-Lysine (Fe3O4-L), and Fe3O4@SiO2-NH2 NPs were produced to alter and enhance the properties of Fe3O4 NPs for CO2 capture in sulfinol-M as a base solvent. CO2 capture experiments were carried out in a high-pressure batch apparatus in which CO2 absorbed into sulfinol/nano-sulfinol. The influences of NP type, NP loading, and gas phase pressure on CO2 capture were studied. Based on the obtained results, Fe3O4-L and Fe3O4@SiO2-NH2 NPs are notably capable on increasing the CO2 capture capacity of sulfinol-M, and they improved CO2 capture up to 6.3% and 13.36% as compared with the base fluid. Moreover, experiments indicated that all nanosolutions have higher CO2 capture efficiency at higher pressures. Eventually, the effect of NPs stability on CO2 capture was investigated and discussed. Keywords CO2 capture . CO2 absorption . Sulfinol . Fe3O4 . Magnetic . NPs . Amine
Introduction Today, the level of greenhouse gases in the atmosphere was incredibly increased because of the excessive increase of the global production and consumption of different kinds of fossil fuels (Jayanthakumaran et al. 2012). Greenhouse gases like CO2 have different negative effects on the environment, including global warming, melting the polar ice, drought, etc. (Bose 2010; Ridley et al. 2005). Hence, finding effective methods for CO2 uptake seems so necessary. The sulfinol process as one of the most popular hybrid processes has been considered in various studies, due to the high capture capacity of its hydrogen sulfide, CO2, and organic sulfur components (Ghanbarabadi et al. 2019; Nikolic et al. 2009; Ramzan et al. 2018; Yih and Lai 1990). In addition, the sulfinol process can use some additives such as piperazine and even nanoparticles (NPs) in improving its sour gas capture capacity (Ebenezer and Gudmunsson 2005). Sulfinol-M is a mixture of water,
Responsible Editor: Tito Roberto Cadaval Jr * Peyman Keshavarz [email protected] 1
School of Chemical and Petroleum Engineering, Shiraz University, Shiraz, Iran
sulfolane as a strong physical absorbent of CO2, and methyl diethanolamine (MDEA) as a strong chemical absorbent of CO2 (Ghanbarabadi and Khoshandam 2015). Nonetheless, chemical reactions in sulfinol process have stoichiometric limitations at high concentrations of CO2 (Nabipour et al. 2017). Therefore, using NPs can be an effective method for raising the capacity of CO2 capture. For this purpose, scientists have tried to study the relationships among heat and mass transfer (Krishnamurthy et al. 2006; Pang et al. 2015). In initial researches,
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