Effect of oxyfuel condition on char characteristics and burnout Conference

Park, K, Gupta, S, Sahajwalla, V. (2014). Effect of oxyfuel condition on char characteristics and burnout .

cited authors

  • Park, K; Gupta, S; Sahajwalla, V

authors

abstract

  • Oxyfuel combustion is emerging technology for CO2 capture and storage (CCS) in power generation field. Devolatilization and combustion study of three coals were carried out in a drop tube furnace (DTF) at 1673 K in different gas conditions such as N2, CO2, O2/N2 and O2/CO2. Char characteristics were measured using X-ray diffraction (XRD) and surface area analyzer by CO2 adsorption. Under all the tested conditions, compared with combustion in air, the presence of CO2 increased coal burnout due to char gasification with CO2. The effect of CO2 on char properties was influenced by coal type such low volatile coal indicated small increase in the burnout. After treatment with 100% CO2 in a DTF, high volatile coal showed a greater change in the carbon structure parameters and surface area of chars when compared to low volatile coal. The study has implications on coal selection for emerging oxyfuel combustion process due to their impact on char properties and hence on combustion performance.

publication date

  • January 1, 2014