CO2 capture efficiency and carbonation/calcination kinetics of micro and nanosized particles of supercritically precipitated calcium carbonate
作者： A.M. López-Periago , J. Fraile , P. López-Aranguren , L.F. Vega , C. Domingo
DOI: 10.1016/J.CEJ.2013.04.071
关键词:
摘要: Abstract Calcium based CO2 solid sorbents reveal a different efficiency of the carbonation/calcination cycle according to their origin, natural or synthetic, and synthesis method. The objective this research was develop high-performance for capture at high temperature by using supercritical method precipitate CaCO3 precursors. Two were synthesized: micrometric particles surrounding Ca(OH)2 nanometric calcite with CaO core. Results compared atmospherically precipitated calcium carbonate. Capture performance produced materials tested in magnetic microbalance under mild calcination conditions (750 °C N2) 900 °C pressure. Further, tubular furnace treated samples carbonation (700 °C used perform an extensive investigation on morphological textural characteristics calcined carbonated samples. At 750 °C, enhanced reversibility reaction faster kinetics observed supercritically prepared sample other two studied materials. After 25 cycles, has one highest values residual conversion described literature. presence CO2, severe sintering occurred both similar recorded Nevertheless, these still have value times higher than that limestone.
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