Synthesis of calcium carbonate via integrated CO2 absorption and mineralization using deep eutectic solvents at ambient pressure

Name: Parina Nuket

Organization : Chulalongkorn University. Center of Excellence in Particle and Material Processing Technology

Name: Paravee Vas-Umnuay

Organization : Chulalongkorn University. Center of Excellence in Particle and Material Processing Technology

Email : Paravee.v@chula.ac.th

keyword: Deep eutectic solvents

LCSH: Carbon dioxide -- Absorption and adsorption

; Monoethanolamine

LCSH: Carbon sequestration

; Choline chloride

LCSH: Calcium carbonate

Abstract: Integrated CO₂ absorption and mineralization (IAM) is a novel approach for capturing CO₂ gas using an amine solution to form carbamate, which subsequently reacts with calcium ions to produce calcium carbonate (CaCO₃) precipitate. Generally, the efficiency of this process and the properties of the resulting CaCO₃ are influenced by three primary factors: the source of calcium ions, the type of absorbent, and the reaction conditions. This study investigates the IAM synthesis of CaCO₃ from CO₂ at atmospheric pressure, employing calcium hydroxide (Ca(OH)₂) as the calcium ion source and a deep eutectic solvent (DES) composed of monoethanolamine (MEA) and choline chloride (ChCl) as the absorbent. Water is added to the DES to modify its viscosity. Our objective is to enhance CO₂ absorption efficiency, thereby contributing to greenhouse gas reduction while generating a commercially viable product. We examine the impact of varying DES-to-water ratios (1:5, 1:10, and 1:15) on the absorbent’s properties, including functional groups, pH, and viscosity, CO₂ loading, and the characteristics of CaCO₃ particles. Results demonstrate that increasing water content significantly improves CO₂ absorption efficiency and yields a higher purity of the desirable aragonite phase of CaCO₃

King Mongkut's University of Technology North Bangkok. Central Library

Address: BANGKOK

Email: library@kmutnb.ac.th

Created: 2025

Modified: 2025-10-29

Issued: 2025-10-29

บทความ/Article

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BibliograpyCitation : In The Chemical Society of Thailand under the Patronage of Professor Dr. Her Royal Highness Princess Chulabhorn Krom Phra Srisavangavadhana and Suranaree University of Technology. Institute of Science. School of Chemistry. Pure and Applied Chemistry International Conference 2025 (PACCON 2025) (pp.759-764). Bangkok : The Chemical Society of Thailand under the Patronage of Professor Dr. Her Royal Highness Princess Chulabhorn Krom Phra Srisavangavadhana in association with the School of Chemistry, Institute of Science, Suranaree University of Technology, 2025

eng

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