LU Shangqing, WU Sufang. Modulation of nano CaCO3 pore size and effect on properties of carbonation reaction[J]. CIESC Journal, 2018, (6): 2753-2758. DOI: 10.11949/j.issn.0438-1157.20171296.
LU Shangqing, WU Sufang. Modulation of nano CaCO3 pore size and effect on properties of carbonation reaction[J]. CIESC Journal, 2018, (6): 2753-2758. DOI: 10.11949/j.issn.0438-1157.20171296.DOI:
The pore size modulation of nano CaCO3 particlesand its effect on the CaO carbonation with CO2 have been studied. A series of nano CaCO3 with similar surface area but different pore size distributions were prepared by organic templates
and their differences in regeneration and carbonation properties were tested. The results showed that enlarging the average pore diameter could accelerate the thermal decomposition of CaCO3
and drop the regenerate temperature by 15℃. Analogously
increasing the pore diameter from 15 nm to 113 nm could promote the CaO carbonation rate and conversion. Additionally
researches revealed that the average pore diameter and surface area had a complex affection on CaO carbonation rate and conversion. The carbonation conversion of nano CaCO3 with lower surface area is mostly affected by diffusion
while the conversion of nano CaCO3 with greater surface area is mainly influenced by surface reaction.