TY - JOUR

T1 - Investigation on the influence of wood pellets on the reactivity of coke with CO2 and its microstructure properties

AU - Kieush, Lina

AU - Schenk, Johannes

AU - Pfeiffer, Andreas

AU - Koveria, Andrii

AU - Rantitsch, Gerd

AU - Hopfinger, Horst

N1 - Publisher Copyright: © 2021 Elsevier Ltd

PY - 2022/2/1

Y1 - 2022/2/1

N2 - Adding 5 mass% wood pellets in a coal blend affects the reactivity with CO 2 and microstructural properties of the coke at different final coking temperatures of 950 and 1100 °C. A correlation between coke reactivity index (CRI) and BET specific surface area was found. The reactivity of coke and biocoke decreases with a decrease in the specific surface area, as well as with an increase in the carbonization temperature. Raman spectroscopy results indicate that the higher carbonization temperature of biocoke mitigates the effect of 5 mass% of biomass addition. The X-ray diffraction-based interlayer spacing of carbon crystallite (d 002) decreases slightly with increasing carbonization temperature, and crystallite height (L c) increases with rising coking temperature for both coke and biocoke. Additionally, the lower the d 002 value, the lower the CRI of the cokes and biocokes. A good correlation between CRI and d 002 is observed. Carbon crystallite width (L a) values increased with a rising carbonization temperature, indicating the intensive growth of carbon crystallites in all directions. However, these values for biocokes are lower due to the presence of charcoal particles.

AB - Adding 5 mass% wood pellets in a coal blend affects the reactivity with CO 2 and microstructural properties of the coke at different final coking temperatures of 950 and 1100 °C. A correlation between coke reactivity index (CRI) and BET specific surface area was found. The reactivity of coke and biocoke decreases with a decrease in the specific surface area, as well as with an increase in the carbonization temperature. Raman spectroscopy results indicate that the higher carbonization temperature of biocoke mitigates the effect of 5 mass% of biomass addition. The X-ray diffraction-based interlayer spacing of carbon crystallite (d 002) decreases slightly with increasing carbonization temperature, and crystallite height (L c) increases with rising coking temperature for both coke and biocoke. Additionally, the lower the d 002 value, the lower the CRI of the cokes and biocokes. A good correlation between CRI and d 002 is observed. Carbon crystallite width (L a) values increased with a rising carbonization temperature, indicating the intensive growth of carbon crystallites in all directions. However, these values for biocokes are lower due to the presence of charcoal particles.

UR - http://www.scopus.com/inward/record.url?scp=85116564095&partnerID=8YFLogxK

U2 - 10.1016/j.fuel.2021.122151

DO - 10.1016/j.fuel.2021.122151

M3 - Article

VL - 309.2022

JO - Fuel

JF - Fuel

SN - 0016-2361

IS - 1 February

M1 - 122151

ER -