Abstract
Dolomite is a mineral material that is formed from limestone which is mostly contains the calcite (CaCO3) and magnesite (MgCO3). This paper aimed to study on thermal decomposition of dolomite under air atmosphere. Calcination of dolomite was carried out by using furnace with heating rate of 10 °C/minute in an air atmosphere. The different temperature of calcination was varied at 400 °C, 600 °C, 800 °C, and 1000 °C within 6 hours. Phase analysis (XRD) and functional group analysis (FTIR) were carried out to analysis the dolomite after calcination. Microstructural (SEM) and Energy Dispersive X-ray (EDX) analysis showed that the main constituents of pure dolomite include CaCO3 (calcite), MgCO3 (magnesite), CaO, and MgO. From the results, XRD showed that the high intensity of CaO and MgO at 800 - 1000 °C was much stronger than that of dolomite at 400 - 600 °C. In addition, FTIR presents strong and intense bands are observed at 3632.23 and 3690.98 cm−1 (800 °C), and also 3694.03 and 3633.60 cm−1 (1000 °C) due to the calcium oxide.
Highlights
Dolomite, CaMg (CO3)2 is an abundant carbonate material and it coexists with calcite in nature
This paper aimed to study on thermal decomposition of dolomite under air atmosphere
Microstructural (SEM) and Energy Dispersive X-ray (EDX) analysis showed that the main constituents of pure dolomite include CaCO3, MgCO3, Calcium Oxide (CaO), and Magnesium Oxide (MgO)
Summary
CaMg (CO3) is an abundant carbonate material and it coexists with calcite in nature. Calcination of dolomite at higher temperature (> 450 0C) leads to covers covering of pores and the surface topography of the sample has no significant changes. Calcination of MgCO3 occur at lower temperature and much faster than CaCO3. During this process, the porosity of the dolomite structure largely increases [1,2]. Calcination of CaCO3 takes place once MgCO3 fully calcined and the particle achieves its maximum porosity and specific surface area
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
