THE EFFECT OF COAL CHARACTERISTICS OF THE KUTAI, BARITO, AND SOUTH SUMATERA BASINS ON GASIFICATION REACTIVITY USING THERMOGRAVIMETRIC ANALYSIS (TGA)

• Main Author: Fauziyyah, Nurul
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/67656
• Institution: Institut Teknologi Bandung

The Indonesian archipelago is in a very active tectonic condition so it becomes the right place for the deposition of sedimentary rocks including coal. Coal is currently being used as a primary energy source, but the use of coal can be maximized to fulfill domestic energy needs, one of which is through the gasification process. Gasification is a process of converting coal into gas through incomplete combustion to produce synthetic gas. With the various characteristics of coal in Indonesia, it is necessary to study the effect of differences in coal characteristics on the effectiveness of coal gasification. The coal used were 3 (three) from; Embalut-Kalimantan Timur (Cekungan Kutai), Teweh Tengah-Kalimantan Tengah (Cekungan Barito), and Musi Rawas-Sumatera Selatan (Cekungan Sumatera Selatan). The gasification reactivity test method is focused on analyzing the thermal characteristics of the pyrolysis and gasification process using thermogravimetric analysis starting from 50°C to 900°C with a temperature increase of 10°C/minute using Argon (Ar) atmosphere, then holding the samples for 10 minutes to obtain an isothermal state, and changing the atmosphere to 25% air and 75% Argon (Ar). The coal characteristics are interpreted from the result of proximate analysis, ultimate analysis, and calorific value. As a result, coal with lower rank has a higher gasification reactivity because its structure is more porous. High porosity will increase the surface area of the coal, thus making the reactants free and easy to react with coal.