MICROSCOPIC STUDY OF NATURAL COKE, BATU AYAU FORMATION, UPPER KUTAI SUB-BASIN, CENTRAL KALIMANTAN
Coal is a primary energy source in various industries, including power generation and iron and steel smelting. In the iron and steel industry, coking coal is converted into coke, which is then used as a reducing agent. Coke can naturally form through the contact of intrusive rocks with coal seams...
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| Format: | Final Project |
| Language: | Indonesia |
| Online Access: | https://digilib.itb.ac.id/gdl/view/82796 |
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| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | Coal is a primary energy source in various industries, including power generation
and iron and steel smelting. In the iron and steel industry, coking coal is converted
into coke, which is then used as a reducing agent. Coke can naturally form through
the contact of intrusive rocks with coal seams, known as Natural Coke or natural
coke. This study aims to provide insights into the microscopy and formation process
of natural coke, particularly in the Batu Ayau Formation, Upper Kutai Sub-Basin,
Central Kalimantan. The coal samples were analyzed through proximate, ultimate,
and petrographic analysis. The natural coke studied exhibited the unique coking
structure, including flow structure and mosaic texture ranging from fine to coarse,
and mesophase spheres with residual vitrinite showing low anisotropy, formed at
temperatures >500?. Additionally, micro-cracks and vesicles or micro-pores
formed at temperatures of 300-500? were observed. The formation of coke in the
study area is thought to be influenced by the intrusion of igneous rocks, as reflected
by the low volatile matter content. |
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