| 초록 |
The CO2 capture capacity and regeneration property were measured in the presence of H2O in a fixed bed reactor, during multiple cycles at various temperature conditions. Sorbents such as K2CO3/AC, K2CO3/TiO2, K2CO3/MgO, and K2CO3/Al2O3 showed excellent CO2 capture capacity (86, 83, 119, 85 mg CO2/g sorbent, respectively). In the case of K2CO3/AC and K2CO3/TiO2, it was possible to regenerate even within a low temperature range, due to the formation of a KHCO3 crystal structure during CO2 absorption, unlike K2CO3/Al2O3 and K2CO3/MgO. In particular, the rate of regeneration of the new sorbent (K2CO3/TiO2) was a little more than that of K2CO3/AC even at low temperatures. These results indicate that the nature of support plays an important role for CO2 absorption and regeneration capacities and, in particular, the formation of the KHCO3 crystal structure during CO2 absorption is an important factor for regeneration, even at the low temperature. Considering that the regeneration capacity was an important factor for a sorbent in addition to the CO2 capture capacity, K2CO3 /TiO2 could be used as a sorbent that had the potential for CO2 absorption. |
