Thermal decomposition of the CaO in traditional lime kilns. Applications in cultural heritage conservation

Biomass-Origin Carbon Capture, Storage and Utilization in Greenhouses: The Co2serre Project in Centre-Val De Loire (France)

“…Pure carbon dioxide stream is then captured and lime is put back into the carbonator. Conversion from CaO to CaCO3 is generally limited to 70% for the first cycle and falls to 10% after 30 cycles [4]. The energy penalty can be reduced by using the carbonator and calciner as a heat source for a steam cycle to produce additional power.…”

The Effect of Calcination Temperature on The Quality of Quicklime from Different Limestone Mines in West Sumatera, Indonesia

“…During thermal processing, carbonate decomposes and form calcium oxide (CaO) and gaseous carbon dioxide (CO2) (Sandström et al, 2021;Fedunik-Hofman et al, 2019;Giammaria and Lefferts, 2019). Quicklime is an essential raw material for industrial applications, such as food processing, water, and wastewater treatment, plastics, glass, and agriculture (Yadav et al, 2021;Ontiveros-Ortega et al, 2018). It is essential to understand the basic characteristics of limestone (e.g., geological characteristics) for achieving the good quality of quicklime and satisfying the demand of the industry.…”

“…Calcination of limestone between 800 and 1000℃ may produce quicklime with small impurities through the calcination reaction (Section 2.2.3). The investigations of the influence of calcination temperature on quicklime characteristics are piled in an enormous study and have shown that the formation of quicklime involved the destruction of the crystal structure of calcite at 600-850℃ (Ontiveros-Ortega et al, 2018;Nordin et al, 2015;Kudlacz and Rodríguez-Navarro, 2014). CaO started to form under the temperature of 800℃, involving the decomposition of chemical materials without CO2 pressure control in the kiln.…”

“…However, the temperature can limit the calcination process, which controls the heat transfer through the particle to the reaction interface (Zhou et al, 2021), resulting in low purity of quicklime. The characteristics of limestones also affect the calcination process, increasing the temperature to 1000℃ generates greater volumes of micropores, which can affect the quality of quicklime (Ontiveros-Ortega et al, 2018).…”

“…However, the value is 5% lower compared to the theoretical CO2 mass content. The findings suggested that the calcination reaction only occurs on the particle surface, not in the whole particles (Ontiveros-Ortega et al, 2018;Maina, 2013) resulting in low CO2 mass content. The CO2 mass content in this study was observed similar from different limestone mines, indicating a similar release rate of CO2 for each calcination temperature.…”