Effective thermal properties and proximate analysis of coke-coal fines mixtures
Soto Rivero, M F | 2021-06-04
We report the effective thermal properties at room temperature and proximate analysis
of three mixtures of coke and carbon fines formed by uniaxial pressing at 30 MPa. Using
differential scanning calorimetry and thermogravimetry, the thermal behavior of the carbon
samples was determined. The KD2 Pro® system was used to measure the effective thermal
properties, while the proximate analysis was carried out applying the ASTM D 3172-89 standard.
It was found for coke fines that in the range between 40.00 °C and 293.94 °C there is a loss in
weight of 3.2%, which corresponds to the degradation of low molecular weight volatiles, another
degradation was also observed between 90.07 °C and 336.21 °C, and the maximum
devolatilization temperature was 579 °C, finally from 700 °C the melting process begins, which
corresponds to the formation of coke. It was also observed that the thermal conductivity increases
with increasing coke concentration in the sample, and that the mixture with the highest thermal
diffusivity was the one formed with 80% coke fines and 20% carbon fines. According to the
thermal properties of the samples can be to be used efficiently as fuel.