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Calcite precipitation from by-product red gypsum in aqueous carbonation process

Rahmani, Omeid and Tyrer, Mark and Junin, Radzuan (2014) Calcite precipitation from by-product red gypsum in aqueous carbonation process. RSC Advances, 4 (85). pp. 45548-45557. ISSN 2046-2069


Official URL: http://dx.doi.org/10.1039/c4ra05910g


The carbon dioxide (CO2) concentration of the atmosphere has been increasing rapidly, and this rapid change has led to promotion of CO2reduction methods. Of all the available methods, CO2mineral carbonation provides a leakage-free option to produce environmentally benign and stable solid carbonates via a chemical conversion to a more thermodynamically stable state. In this research, the precipitation of calcite from by-product red gypsum was evaluated for mineral CO2sequestration. For this purpose, the impact of changing variables such as reaction temperature, particle size, stirring rate, and liquid to solid ratio were studied. The results showed that optimization of these variables converts the maximum Ca (98.8%) during the carbonation process. Moreover, the results confirmed that red gypsum has a considerable potential to form calcium carbonate (CaCO3) during the CO2mineral carbonation process. Furthermore, the low cost and small amount of energy required in the use of by-product red gypsum were considered to be important advantages of the CO2sequestration process. Therefore, the acceptable cost and energy required in mineral carbonation processing of red gypsum confirms that using this raw material represents a method for mineral carbonation with minimal environmental impact

Item Type:Article
Uncontrolled Keywords:aqueous carbonation, calcite precipitation
Subjects:T Technology > TN Mining engineering. Metallurgy
Divisions:Petroleum and Renewable Energy Engineering
ID Code:52045
Deposited By: Siti Nor Hashidah Zakaria
Deposited On:01 Feb 2016 03:53
Last Modified:29 Aug 2018 08:26

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