2017 Volume 50 Issue 3 Pages 213-220
Three K2CO3-MgO based solid sorbents were prepared with a spray drying method to prevent the degradation of the chemical reactivity of K2CO3-Al2O3 sorbents named KEP-CO2P, which were produced in bulk. Their physical properties and reactivity were screened to evaluate their applicability to a 0.5 MWe (2,000 Nm3/h) CO2 capture pilot plant built for Unit 3 and a 10 MWe (40,000 Nm3/h) CO2 capture pilot plant built for Unit 8 of the Hadong thermal power station. The CO2 sorption capacity and percentage utilization of K2CO3-MgO based sorbent, Sorb-KM2, was 8.6 wt% (g-CO2/100 g-sorbent) and 90%, respectively, along with good mechanical strength for fluidized-bed application. Sorb-KM2 was tested using a 2 Nm3/h circulating fluidized bed process to evaluate their applicability to a fluidized bed process, and the chemical and structural characteristics were investigated by PSA, FE-SEM, EPMA and XPS.