Vermicular kaolinite relics in fly ash derived from Bokaro and Jharia coals (Jharkhand, India)

• Type: Article in International Scientific Journal
• Date: 2016

Authors

B. Valentim (Author) FCUP; Flores, D (Author) FCUP; Guedes, A (Author) FCUP; Shreya, N (Author) Other; Paul, B (Author) Other; Ward, CR (Author) Other

Journal

Title: International Journal of Coal Geology

Vol. 162

Pages: 151-157

ISSN: 0166-5162

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 8 Citations

Scopus - 9 Citations

Other information

Authenticus ID: P-00K-JRY

DOI: 10.1016/j.coal.2016.06.011

Abstract (EN): During a study of fly ash from two pulverized fuel power plants (Bokaro and Chandrapura) burning coal from the Bokaro Coalfield in Jharkand state, India, glassy and vermicular mineral forms were found associated with the char. A combination of optical microscopy, XRD, SEM/EDS, and XRF analysis has shown that this morphotype, reported here for the first time, originated from kaolinite that expanded during heating inside the furnace chamber under relatively low combustion temperatures. The morphotype has an internal structure that resembles the fanning-out structure formed during vermicular kaolinite development.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 7