# Coal quality characterization in East Kalimantan Province, Indonesia: Review from proximate, ultimate and calorific value analyses
> Rahman R.

URL kanonis: https://discover.unhas.ac.id/publications/coal-quality-characterization-in-east-kalimantan-province-indonesia-review-from
Jurnal / Konferensi: Iop Conference Series Earth and Environmental Science
Tahun terbit: 2020
DOI: https://doi.org/10.1088/1755-1315/473/1/012100
ISSN: 17551307
Citations: 7

## Authors
- Rahman R.

## Abstract
Abstract This study discussed the characterization of the different qualities of coal in Kalimantan. The chemical and physical characterization of Kalimantan coal aimed to find the level of coal quality through proximate, ultimate and calorific value analysis. Based on the results of the study, the coal obtained from PT. Kideco Jaya Agung (KJA) had a moisture content of 17.86%, a fixed carbon of 36.56%, ash of 2.94%, volatile matter of42.64%, carbon of 44.86%, sulfur of 0.079% and calorific value of 4468.65 cal/gram. PT. Indemix Coalindo (IC) had coals with the moisture content of 25.94%, fixed carbon of 32.48%, ash of 3.78%, volatile matter of 38.26%, carbon of 45.03%, sulfur of 0.436% and calorific value of 4462.67 cal/gram. Based on the results of the study, the efforts were needed to improve the quality of coal so that the coal collected could become an alternative energy-source with its highest quality and calorific value. Thus, it could compete in the international market.

## Keywords
- Heat of combustion
- Coal
- Proximate
- Moisture
- Environmental science
- Energy value of coal
- Water content
- Carbon fibers
- Waste management
- Sulfur
- Pulp and paper industry
- Chemistry
- Mathematics
- Materials science
- Metallurgy
- Coal combustion products
- Combustion
- Engineering
- Food science
- Composite number
- Algorithm
- Geotechnical engineering
- Organic chemistry

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Sumber: Discover Unhas — RIMS Universitas Hasanuddin.
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