Hot Coke Strength in CO₂ Reaction

Abstract

This study aims to investigate the strength of coke at high temperature in reaction atmosphere. A uniaxial compression test measured the fracture stress of coke at three conditions: (i) room temperature and air atmosphere; (ii) 1100°C and N₂ atmosphere; (iii) 1100°C and CO₂ atmosphere. The drum index (DI) and coke strength after reaction (CSR) were also measured. The DI and CSR of coke produced by a lump of caking coal were higher than those of coke produced by non- or slightly caking coal. The compression tests showed that the fractured stress at room temperature in the air atmosphere was lower than that at 1100°C in the N₂ atmosphere. Also, the fractured stress at 1100°C in the N₂ atmosphere was higher than that at 1100°C due to the CO₂ reaction. The DI, CSR, and hot coke strength of coke produced by caking coal was higher than those of coke produced by non- or slightly caking coal.

Stress-strain curve of coke samples: (a) Coke A; (b) Coke C. 01 and 02 are sample numbers. (Online version in color.)