ZHANG Mingming, PENG Yunxiang, WANG Jin, et al. Preparation of ternary composite Ca-based material CaO-Ca3Al2O6-MgO for high-temperature CO2 capture[J]. CIESC Journal, 2014, (1): 227-236. DOI: 10.3969/j.issn.0438-1157.2014.01.029.
ZHANG Mingming, PENG Yunxiang, WANG Jin, et al. Preparation of ternary composite Ca-based material CaO-Ca3Al2O6-MgO for high-temperature CO2 capture[J]. CIESC Journal, 2014, (1): 227-236. DOI: 10.3969/j.issn.0438-1157.2014.01.029.DOI:
Synthetic sintering-resistant calcium based material for high-temperature CO2 capture was prepared by doping Al2O3 and MgO into CaO using wet chemical method. The synthetic materials with pore structure developed consist of three substances
CaO
Ca3Al2O6 and MgO. Lower mass ratio of Ca3Al2O6/MgO gives smaller grain size of the synthetic material. CO2 capture capacities and cyclic carbonation/calcination (670/900℃) stability were evaluated in thermogravimetric analyzer under the simulated 10%(vol.
the same below) CO2 (90% N2). It is found that the synthetic CaO-Ca3Al2O6-MgO material presents good performance to capture CO2 from the flue gas
and the mass ratio of Ca3Al2O6/MgO has significant effect on CO2 capture performance. Lower mass ratio leads to faster carbonation reaction rate and higher CaO conversion. Moreover
the deactivation mechanism of synthetic material and the anti-sintering mechanism of doping agents were studied through analysis of specific surface area
pore volume
micro morphology
element distribution
phase composition and grain size of CaO-Ca3Al2O6-MgO material after multicycle carbonation/calcination.