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

Lina Kieush; Johannes Schenk; Andreas Pfeiffer; Andrii Koveria; Gerd Rantitsch; Horst Hopfinger

doi:10.1016/j.fuel.2021.122151

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

Lina Kieush, Johannes Schenk, Andreas Pfeiffer, Andrii Koveria, Gerd Rantitsch, Horst Hopfinger

Publikation: Beitrag in Fachzeitschrift › Artikel › Forschung › Begutachtung

Abstract

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.

Originalsprache	Englisch
Aufsatznummer	122151
Seitenumfang	12
Fachzeitschrift	Fuel
Jahrgang	309.2022
Ausgabenummer	1 February
Frühes Online-Datum	7 Okt. 2021
DOIs	https://doi.org/10.1016/j.fuel.2021.122151
Publikationsstatus	Veröffentlicht - 1 Feb. 2022

Bibliographische Notiz

Funding Information:
Support by the scholarship program “Ernst Mach Grant - worldwide,” [ICM-2020-00100], financed by the Federal Ministry of Education, Science and Research of Austria, is gratefully acknowledged. We also wish to acknowledge the Montanuniversität Leoben for the support and staff of the Chair of Ferrous Metallurgy, who assisted throughout the project. Additionally, the authors thank Dr. Anrin Bhattacharyya for his assistance at the beginning of the project. Comments by reviewers on a previous version of this paper are acknowledged.

Publisher Copyright:
© 2021 Elsevier Ltd

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abstract = "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. ",

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AU - Kieush, Lina

AU - Schenk, Johannes

AU - Pfeiffer, Andreas

AU - Koveria, Andrii

AU - Rantitsch, Gerd

AU - Hopfinger, Horst

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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.

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