THE EFFECT OF MUARA WAHAU COAL COMPOSITION ON THERMAL BEHAVIOR USING PYROLYSIS APPROACH WITH THERMOGRAVIMETRIC ANALYSIS (TGA)

• Main Author: Hafizh Azhar, Luthfi
• Format: Final Project
• Language: Indonesia
• Subjects: Pertambangan dan operasi berkaitan
• Online Access: https://digilib.itb.ac.id/gdl/view/51500
• Institution: Institut Teknologi Bandung

Coal in Indonesia is mostly utilized as a source of energy, cement factories and coke. The use of coal in several countries is for gasification because gasification is efficient in terms of energy conversion and has less air pollutants. The thermal properties of coal can be studied using thermogravimetric analysis (TGA). This research only focuses on the thermal characteristics of coal during the pyrolysis process. Two coal samples from Muara Wahau were studied to determine thermal behavior with a pyrolysis approach using a thermogravimetric analysis (TGA) device. This thermal behavior can provide an overview during the coalification in nature, processes that occurs in underground coal gasification, and others. Proximate analysis and ultimate analysis of coal are used to determine the composition contained in coal, calorific value is also used to find out the coal rank. The TGA results show that Muara Wahau coal was divided into four stages which are dehydration, slow pyrolysis, fast pyrolysis (primary cracking), and secondary cracking during the pyrolysis process. Two coal samples are included in the same coal rank Subbituminous C, but the TGA results show that the mass loss of the two samples is different. The difference is caused by composition of coal, for example moisture content and volatile matter. The difference of volatile matter content is not significant so that is most likely caused by differences of composition organic matter rather than coal rank. The more volatile matter content from proximate analysis, the amount of gases formed is increasing including hydrocarbon gases during pyrolysis process.