Pressurized oxy-fuel combustion (POFC) is a promising carbon capture and storage technology because of its ability for

effi cient CO 2 capture and storage at a relatively low cost. However, the experimental studies conducted on this technology

considering pressurized conditions are limited compared with those conducted considering atmospheric conditions. Thus,

further investigation on the performance and environmental emissions of oxy-fuel combustion is necessary. In this study,

oxy-fuel combustion experiments were conducted using a 10 kW th fl uidized bed combustion (FBC) test rig at pressures

ranging from 3 to 8 bar (g). The eff ects of combustion pressure, oxygen concentration, and cofi ring with diff erent fuels on

combustion temperature, unburned carbon, combustion effi ciency, as well as SO x and NO x emissions were examined. The

experimental results showed that the CO 2 concentration in the fl ue gas exceeds 90% in all POFC scenarios, thus facilitating

the carbon capture process. In addition, by increasing the combustion pressure, the unburned carbon and CO concentrations

in the fl y ash are reduced, thereby improving combustion effi ciency. Furthermore, the variations in NO, NO 2 , N 2 O, and SO 2

emissions were measured to assess their environmental impact. Moreover, cofi ring tests using biomass under pressurized

oxy-fuel conditions (5 bar (g), 30% O 2 :70% CO 2 ) showed that these conditions are more environmentally sustainable and

effi cient than other combustion methods for producing energy in a fl uidized bed by burning a mixture of coal and biomass.