Experimental investigation on CO 2 absorption and physicochemical characteristics of different carbon-loaded aqueous sol
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GREEN TECHNOLOGIES FOR SUSTAINABLE WATER
Experimental investigation on CO2 absorption and physicochemical characteristics of different carbon-loaded aqueous solvents Muthumari Perumal 1 & Nilavuckkarasi R. Karunakaran 1 & Ambedkar Balraj 1 & Dhanalakshmi Jayaraman 1 & Jagannathan Krishnan 1 & Aalan Britto John Prakash 1 & Jeevakumar Arumugam 1 & Venkadeshwara Prabhu Muthukumar 1 Received: 9 May 2020 / Accepted: 17 August 2020 # Springer-Verlag GmbH Germany, part of Springer Nature 2020
Abstract The anthropogenic carbon dioxide (CO2) denseness in the earth’s atmosphere is increasing day-to-day by combusting fossil fuels for power generation. And, it is the most important greenhouse gas (GHG) responsible for 64% of global warming. Solvent-based carbon capture gained more attention towards researchers because of its easiness to integrate with the coal-fired power plant without significant modifications. During CO2 absorption, the physical property of the solvent gets changed. A change in the solvent’s physicochemical property affects further CO2 absorption, thereby increasing the carbon-capture energy demand. The present experimental study encompasses CO2 absorption studies using 30 wt% aqueous monoethanolamine (MEA), 2-amino-2methyl-1-propanol (AMP) and piperazine (PZ) followed by the detailed analysis of physicochemical properties (pH, carbon loading (α), viscosity (μ), density (ρ) and surface tension (σ)) of various CO2-loaded solutions. The results revealed that these properties are exhibiting interdependent eccentrics. Furthermore, an empirical model was developed to predict the carbon loading of the tested solvents. This model includes the tested physicochemical properties, reaction mixture temperature, diffusivity and change in the mass of solvent during carbon loading. In addition, an empirical model for viscosity as a function of temperature, carbon loading and molecular weight of solvents was developed. These models appear to predict the carbon loading and the viscosity well with greater accuracy. Keywords CO2 capture . Carbon loading . Diffusivity . Viscosity . Surface tension . Empirical modelling
Introduction Global warming is the phenomenon of raising mean air temperatures near the Earth’s surface. Since mid-twentiethHighlights • Detailed analysis on physicochemical characteristics of different carbon-loaded 30 wt% aqueous MEA/AMP/PZ solutions. • Non-dimensional model to predict the carbon loading of the 30 wt% aqueous MEA/AMP/PZ solution was developed. • In addition, a predictive model for viscosity as a function of solvent molecular weight, temperature and carbon loading of the 30 wt% aqueous MEA/AMP/PZ solution was formulated with greater accuracy. Responsible Editor: Tito Roberto Cadaval Jr * Ambedkar Balraj [email protected]; [email protected] 1
Carbon Capture Lab, Department of Chemical Engineering, SSN College of Engineering, Kalavakkam, Chennai, Tamil Nadu 603110, India
century climate, scientists collected the detailed observations on weather phenomena. And, the study revealed that gl
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