Parametric investigation of the calcium looping process for CO2 capture in a 10kWth dual fluidized bed

Calcium looping (CaL) is a promising post-combustion CO2 capture technology which is carried out in a dual fluidized bed (DFB) system with continuous looping of CaO, the CO2 carrier, between two beds. The system consists of a carbonator, where flue gas CO2 is adsorbed by CaO and a regenerator, where captured CO2 is released. The CO2-rich regenerator flue gas can be sequestered after gas processing andcompression. A parametric study was conducted on the 10kWth DFB facility at the University of Stuttgart,which consists of a bubbling fluidized bed carbonator and a riser regenerator. The effect of the following parameters on CO2 capture efficiency was investigated: carbonator space time, carbonator temperatureand calcium looping ratio. The active space time in the carbonator, which is a function of the space time and the calcium looping ratio, was found to strongly correlate with theCO2 capture efficiency. BET and BJH techniques provided surface area and pore volume distribution data, respectively, for collected sorbentsamples. The rate of sorbent attrition was found to be 2 wt.     «

Calcium looping (CaL) is a promising post-combustion CO2 capture technology which is carried out in a dual fluidized bed (DFB) system with continuous looping of CaO, the CO2 carrier, between two beds. The system consists of a carbonator, where flue gas CO2 is adsorbed by CaO and a regenerator, where captured CO2 is released. The CO2-rich regenerator flue gas can be sequestered after gas processing andcompression. A parametric study was conducted on the 10kWth DFB facility at the University of St...     »