Relationships between the optical properties of coal macerals and the chars resulting from fluidized bed pyrolysis

Valentim, Bruno, Rodrigues, Sandra, Ribeiro, Sofia, Pereira, Geny, Guedes, Alexandra and Suarez-Ruiz, Isabel (2013) Relationships between the optical properties of coal macerals and the chars resulting from fluidized bed pyrolysis. International Journal of Coal Geology, 111 80-89. doi:10.1016/j.coal.2012.11.017


Author Valentim, Bruno
Rodrigues, Sandra
Ribeiro, Sofia
Pereira, Geny
Guedes, Alexandra
Suarez-Ruiz, Isabel
Title Relationships between the optical properties of coal macerals and the chars resulting from fluidized bed pyrolysis
Journal name International Journal of Coal Geology   Check publisher's open access policy
ISSN 0166-5162
1872-7840
Publication date 2013-05-01
Year available 2013
Sub-type Article (original research)
DOI 10.1016/j.coal.2012.11.017
Volume 111
Start page 80
End page 89
Total pages 10
Place of publication Amsterdam, Netherlands
Publisher Elsevier BV
Collection year 2014
Language eng
Formatted abstract
In this study the values of the RIS axes and parameters were calculated using Kilby's method to the characterization of the textural anisotropy and structure of the basic structural units of coal macerals (collotelinite, fusinite, and macrinite). Their microstructural evolution after having been subjected to fluidized bed pyrolysis at 800 °C was investigated, using the same parameters, on their respective char portions (fused char, fusinoids, and inertoids). Thus, this work represents the first attempt to determine the variations of the optical properties of fluidized bed chars.
After the thermal treatment, the fusinoids and the inertoids presented similar Rr% values and RIS parameters values, indicating that after pyrolysis these materials are texturally and structurally similar.
Collotelinite produced fused chars with a higher reflectance than those resulting from fusinoids and inertoids. Their reflectance increase in lower and decrease in higher rank coals. The highest RMAX%, Rev, and Ram increase occurred in the fused char portions derived from the collotelinite of coals in the 0.86–1.60 Rr% range, indicating substantial chemical and spatial rearrangement.
Keyword Collotelinite
Fusinite
Macrinite
Chars
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Earth Sciences Publications
Non HERDC
 
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