Study of lime flow rate on calcium looping carbon capture for steel plant.

This article focuses on simulating calcium looping carbon capture technology applied to a steel plant using three fuel scenarios: coal, coke, and a 50/50 coal-coke mix. The study evaluates how lime (CaO) flow rate affects carbon capture efficiency and raw material costs within the calcium looping process, which involves carbonation and calcination reactions to separate and capture CO2 from flue gas. Results indicate that increasing lime flow improves flue gas CO2 capture efficiency but raises raw material costs and can reduce overall capture efficiency due to additional CO2 emissions from lime and coal production. Among the fuel cases, using coal as fuel yields the highest carbon capture efficiency and lowest raw material cost, suggesting that producing coke from coal onsite via coke oven batteries is advantageous for reducing CO2 emissions in steelmaking.