Abstract
Underground Coal Gasification (UCG) is a process of converting coal in the ground into synthetic gas that has economic value. In the UCG process which will be carried out in the UCG prototype assisted by the presence of oxygen as a gasification agent, which this gasification agent will help the process of burning coal in the ground. The flow rate of oxygen in the process of UCG affecting the coal combustion temperature and effective flame from burning coal. The highest temperature at a flow rate of 5 l/min is 240oC, at an oxygen flow rate of 3 l/min the highest temperature is 143oC and at an oxygen flow rate of 2 l/min the highest temperature is 135oC and time effective flame at a flow rate of 5 l / min ie 80 minutes, effective burning time on the speed of the flow rate of 3 l / min ie for 120 minutes and time effective flame at a flow rate of 2 l / min ie for 165 minutes. This study proves that the greater the oxygen flow rate is used as the gasification agent at UCG process the lignite coal combustion temperatures will be high and effective flame coal combustion process will be more brief.
Highlights
Increased energy consumption in Indonesia encourages energy conservation in the field of renewable energy [1]
RESEARCH METHOD we will discuss the material to be used in the Underground Coal Gasification (UCG) research, namely MT 47 coal obtained from the Bukit Asam Tanjung Enim mine site, and discuss the research method used, namely the process of burning coal in the prototype underground coal gasification
A study showed that Underground Coal Gasification with lignite coal using oxygen as a gasification agent may be a viable option as it results in an overall energy efficiency of the process estimated at 59% [23]
Summary
Increased energy consumption in Indonesia encourages energy conservation in the field of renewable energy [1]. That renewable energy becomes one of the options for future energy needs as renewable alternative energy that can support the energy needs of people who still rely on fossil energy sources, one of which is coal. This is supported by the fact that coal is an important energy source for the world, which is used to generate electricity that can generate nearly 40% of the world's electricity [2].
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