Measurement of reaction rates for pulverized fuel combustion in air and oxyfuel atmosphere using a novel fluidized bed reactor setup

摘要

The reaction rate of char from pulverized Columbian coal (Mina Norte) is investigated in synthetic air (N-2/O-2), oxyfuel atmosphere (CO2/O-2) and CO2/N-2 using a lab-scale fluidized bed reactor (FBR). Reactor temperatures range from 823 to 1273 K for combustion and 1173 to 1373 K for gasification (Boudouard). The oxygen volume concentration is varied between 15 and 30 vol.%, while gasification is investigated in a mixture of 10-75 vol.% CO2 in nitrogen. Using an nth order Arrhenius approach, activation energies as well as apparent order of reaction are calculated for the combustion and gasification reactions.