Thermal Decomposition Analysis of Indonesian Natural Dolomite in Air

Abstract:

Dolomite is widely used in the construction, glass ceramics, iron and steel, pharmaceutical industries, as a source of CaO and MgO and as thermal energy storage material. Thermal decomposition analysis of natural dolomite of the so-called Jeddih limestone has been carried out. A thermogravimetry analysis (TGA) in the air evaluates the thermal decomposition of dolomite. The natural dolomite has been analyzed by x-ray flourescence (XRF) and x-ray diffraction (XRD) to test crystal structure and decomposition phase, fourier transform infra-red (FTIR) was utilized to identify the presence of functional groups. The particle morphology was observed by scanning electron microscopy. TGA curve shows that the thermal decomposition of dolomite occurs in two stages. The first stage is in temperature range of 600 - 779°C and the second one is at the temperature 779°C. The results are in line with the XRD and FTIR measurements. Which shows that calcite begins to grow at a temperature of 600°C and MgO phase is observed at 700 - 900°C. Moreover, CaO phase starts to be found at 800°C.

• Periodical: Applied Mechanics and Materials (Volume 916)
• Pages: 19-24
• DOI: https://doi.org/10.4028/p-KVW9hC
• Online since: September 2023
• Authors: Fatimatul Munawaroh, Malik Anjleh Baqiya, Zaenal Arifin, Triwikantoro Triwikantoro*
• Keywords: CaO, Dolomite, MgO, Phase Decomposition, Thermal Properties

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