Abstract:
Multiple cycles of experiments and reaction performance tests respectively were conducted using a batch fluidized bed reactor and a thermogravimetric analyzer. The catalytic effect of Fe
2O
3 on CaSO
4/Ben oxygen carriers (OCs) during chemical looping combustion (CLC) was analyzed and the reaction activation energy of CaSO
4/Ben OCs with different Fe
2O
3 contents and CO were compared. The experimental results showed that the specific surface area and pore volume of CaSO
4/Ben OCs increased with the addition of Fe
2O
3, which improved the reduction reaction rate and maintained the high CO
2 concentration in the system. Fe
2O
3 could inhibit CaSO
4 reaction to generate CaO and sulfur-containing gases, and improve the stability of CaSO
4/Ben OCs circulation reaction.
w=15.0% Fe
2O
3 addition was the best choice. The addition of
w=15.0% Fe
2O
3 reduced the activation energy of CaSO
4/Ben OCs reacting with CO from 88.72 kJ/mol to 43.08 kJ/mol, and the reactivity of CaSO
4/Ben OCs was significantly improved.