Abstract
The Boudouard reactivity of metallurgical coke and densified charcoals was investigated in this study. Potassium is known to accumulate in ferromanganese furnaces and hence was evaluated as a catalyst of CO2 reactivity. Samples were impregnated using a gaseous impregnation technique with K2CO3.The reactivity experiments were designed to simulate conditions occurring in an industrial furnace, as used for production of Mn-alloys. To find out the catalytic effect of potassium, the concentration varied from a fraction of a percent up to 5 wt.%. The results show that with increasing potassium content, the CO2 reactivity of coke and charcoal increased, and this change was more significant for coke. The CO2 reactivities of coke and densified charcoal were much closer to each other at the highest content of potassium. Scanning electron microscopy (SEM) and energy dispersive x-ray spectroscopy (EDS) showed that potassium distributed on the surface as well as on deposited carbon particles formed on densified charcoal.
Highlights
Electric arc furnace and submerged arc furnaces are used to produce steel, silicon, ferrosilicon, silicomanganese, ferromanganese, and so on
The results show that with increasing potassium content, the CO2 reactivity of coke and charcoal increased, and this change was more significant for coke
3 types of densified charcoal and a metallurgical coke were impregnated with potassium and the goal was to investigate the effect of potassium content on the CO2 reactivity
Summary
Electric arc furnace and submerged arc furnaces are used to produce steel, silicon, ferrosilicon, silicomanganese, ferromanganese, and so on. Processes using EAF (electric arc furnace) and SAF (submerged arc furnace) generally generate approximately 1.83 kg CO2 per kg of steel,1 1.04–1.15 kg CO2 per kg ferromanganese,2 1.4–6.9 kg CO2 per kg of silicomanganese, and 2.5–4.8 kg CO2 per kg ferrosilicon.[3,4,5] It is mentioned that the total CO2 equivalent of manganese alloys is about 6.0 kg per kg of alloy when the electricity is produced by coal combustion.[5] Biomass and charcoal can be used to power these furnaces and may potentially result in the reduction of these emissions, e.g., by up to 12% in EAF, or 58% in integrated routes of steel production.[6] one can expect a better understanding of the CO2 equivalent with a better understanding of charcoal properties, which in turn will promote an increased use of renewable (Received June 13, 2021; accepted December 28, 2021). A high reactive carbon material will have a high rate of the Boudouard reaction 1.7
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
