THE EFFECT OF UBC PROCESS ON COAL PETROGRAPHIC CHARACTERISTICS

摘要

Petrographic study of coal is based on the morphology, colour, size of the constituents, reflectance and anisotropy of the macerals in reflected white light and autofluorescence of the constituents under blue-ultraviolet radiation. In more specific, the petrography of coal is based largely on the concepts of maceral and microlithotype. This research intends to determine if the Upgraded Brown Coal (UBC) product of Miocene low rank coal from Kutai area of East Kalimantan, Indonesia can be distinguished petrographically from the raw coal, both air dried and oven dried.