Effect of mixtures of H2O (g) and CO2 (g) on the thermal half decomposition of dolomite natural stone in high CO2 pressure regime

Dolomite study forin situCO2capture for chemical looping reforming

“…From the same figure, it became evident that the presence of steam improved the final experimental conversions reached. Beruto, Vecchiattini, and Giordani (2003) mentioned that steam would accelerate the rate of the first half of the thermal decomposition of dolomite, corresponding to the decomposition of MgCO3, which is in agreement with this study. Moreover, the flow of steam could have allowed less residence time of the supplied and produced CO2 compared with the 'dry' runs, something that promoted the thermal decomposition of MgCO3.…”

“…The kinetics of the calcination carbonation reactions were sparsely studied, by L vov and Ugolkov (2003), Olszak-Humienik and Mo zejko (1999), Samtani, Dollimore,and Alexander (2002) with regard to the calcinations and by Lee (2004) with regard to the carbonation reaction. The effect of steam and CO 2 on these metal oxides was investigated in the high CO 2 pressure regime of the reaction (TDa) by Beruto, Vecchiattini, and Giordani (2003). The effect of steam in the Differential Thermal Analysis (DTA) analysis of CaCO3 decomposition in nitrogen as well as in the carbon dioxide atmosphere found in calcite and dolomite was previously examined by McIntosh, Sharp, and Wilburn (1990).…”

Unified assessment technique for magnesium production waste to be applied in construction

“…The impurity of calcium oxide which is formed in the process of dolomite and calcite decomposition is harmful for the magnesia oxychloride cement and shall be limited to 5% in accordance with the Russian State Standard Specification (RSSS) 1216-87. The negative effect calcium oxide has on quality of magnesia oxychloride cement is confirmed by previous studies, including foreign research [13][14][15][16][17][18].…”

Role of MgxCa1−xCO3 on the physical–chemical properties and cyclic CO2 capture performance of dolomite by two-step calcination

“…There is not enough information about the improved cyclic reactivity in this two-step calcination. It is well known that the thermal decomposition of dolomite proceeds via a single step in a N 2 atmosphere and through two distinct stages at high CO 2 partial pressures [30,31]. Experimental studies [30][31][32] have also shown that the intermediate products under different atmospheres were also different.…”