Calcium Carbonate Production through Direct Mineral Carbon Dioxide Sequestration

Amin Azdarpour, Radzuan Junin, Mohammad Asadullah, Hossein Hamidi, Muhammad Manan, Ahmad Rafizan Mohamad Daud

Research output: Contribution to journalArticle

Abstract

Mineral carbon dioxide sequestration provides a leakage free and permanent method of CO<sub>2</sub> disposal to produce environmentally benign and stable solid carbonates. FGD gypsum as a source of calcium was proposed as the potential feedstock in this study. The purpose of this laboratory study was to investigate the effects of reaction parameters such as CO<sub>2</sub> pressure, reaction temperature, particle size, and ammonia solution concentration on calcium carbonate purity through Merseburg process. Increasing the reaction temperature as well as the pressure was very effective in improving the calcium carbonate purity. High purity calcium carbonate was produced when reaction temperature and CO<sub>2</sub> was increased to 400 °C and 70 bar, resulting in 93% and 94% purity, respectively. Experimental results showed that reducing particle size was also effective in enhancing the calcium carbonate purity in which the smallest particles produced higher purity calcium carbonates rather than larger particles. The role of ammonia solution on calcium carbonate purity was found to be beneficial in improving the calcium carbonate purity in which increasing the ammonia solution increased calcium carbonate purity significantly in all experiments.
Original languageEnglish
Pages (from-to)1020-1025
Number of pages6
JournalApplied Mechanics and Materials
Volume699
Early online date26 Nov 2014
DOIs
Publication statusPublished - 2015

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Keywords

  • Carbon capture and storage
  • Carbon dioxide mineral carbonation
  • GHGs
  • FGD gypsum
  • ammonia solution

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