شماره ركورد كنفرانس :
5041
عنوان مقاله :
Improvement of stability and fluidization behaviour of CaO-based sorbents used in CO2 capture process
Author/Authors :
B. Azimi Department of Chemical & Petroleum Engineering - University of Tabriz, Tabriz, Iran , M. Tahmasebpoor Department of Chemical & Petroleum Engineering - University of Tabriz, Tabriz, Iran , H. Masaaledan Department of Chemical & Petroleum Engineering - University of Tabriz, Tabriz, Iran , M. Piroozmand Department of Chemical & Petroleum Engineering - University of Tabriz, Tabriz, Iran , A. Niaei Department of Chemical & Petroleum Engineering - University of Tabriz, Tabriz, Iran
كليدواژه :
CaO , sorbent , CO2 capture , stability , fluidization
عنوان كنفرانس :
The 10th International Chemical Engineering Congress & Exhibition (IChEC 2018)
چكيده فارسي :
فاقد چكيده فارسي
چكيده لاتين :
Calcium oxide is a promising sorbent for the capture of CO2. The calcium-looping process has been identified as an attractive method for CO2 capture during coal combustion and gasification processes. However, it is well-known that the capture capacity of CaO undergoes a rapid decrease after multiple cycles due to its sintering. In order to increase the stability of adsorbent and also its CO2 capture capacity, two different mixed CaO-based sorbents were synthesized by sol-gel auto combustion method from Ca(NO3)2.4H2O or Ca(C2H3O2)2.H2O as precursors and Al(NO3)3.9H2O as promoter. The synthesized sorbents showed a more porous structure than the pure CaO, which is beneficial to the gas-phase diffusion on their surface area. However, due to the strong cohesive forces between the mixed synthesized sorbents, they are still very hard to fluidize. Alumina nanoparticles were used to modify synthesized sorbents and then enhance their fluidization behavior. By adding 20 wt% of alumina nanoparticles to the mixed sorbents, their bed expansion was increased significantly.
