COVER Yoshimitsu Makabe
PUBLIC Resti Andriani
BAB 1 Yoshimitsu Makabe
Terbatas  Resti Andriani
» Gedung UPT Perpustakaan
Terbatas  Resti Andriani
» Gedung UPT Perpustakaan
BAB 2 Yoshimitsu Makabe
Terbatas  Resti Andriani
» Gedung UPT Perpustakaan
Terbatas  Resti Andriani
» Gedung UPT Perpustakaan
BAB 3 Yoshimitsu Makabe
Terbatas  Resti Andriani
» Gedung UPT Perpustakaan
Terbatas  Resti Andriani
» Gedung UPT Perpustakaan
BAB 4 Yoshimitsu Makabe
Terbatas  Resti Andriani
» Gedung UPT Perpustakaan
Terbatas  Resti Andriani
» Gedung UPT Perpustakaan
BAB 5 Yoshimitsu Makabe
Terbatas  Resti Andriani
» Gedung UPT Perpustakaan
Terbatas  Resti Andriani
» Gedung UPT Perpustakaan
BAB 6 Yoshimitsu Makabe
Terbatas  Resti Andriani
» Gedung UPT Perpustakaan
Terbatas  Resti Andriani
» Gedung UPT Perpustakaan
PUSTAKA Yoshimitsu Makabe
Terbatas  Resti Andriani
» Gedung UPT Perpustakaan
Terbatas  Resti Andriani
» Gedung UPT Perpustakaan
Underground Coal Gasification (UCG) is a technique to recover the energy of coal by
converting coal into gas. One or two wells are drilled from the surface to underground
coal seam in order to inject oxidant which consists of oxygen and air for burning the
coal seam in situ and recover syngas such as carbon monoxide, hydrogen, and methane
in the surface as an energy source. Unused coal resources which have not been
recovered for technical and economic reasons are expected to be used in this
technology. In this research, a large scale experiment which uses an artificial coal block
was conducted, and a co-axial UCG system with a horizontal well was adopted to obtain
results of temperature in the coal block and product gas components. Based on the
results, the amount of reacted coal and gasification efficiency was calculated in order to
evaluate wether the gasification system worked well or not. Moreover, it was compared
with past experimental results for evaluation. Regarding the temperature inside the coal
block, the area above the coaxial hole had the highest temperature, with a peak value at
1200 to 1400 °C. Furthermore, the peak value at 15 cm above the coaxial hole was 1000
to 1200 °C, indicating that the high temperature had expanded up to 15 cm above the
coaxial hole. Meanwhile, the main product gas components are nitrogen, carbon
dioxide, carbon monoxide, hydrogen, and methane. Finally, the result of comparing
gasification efficiency with those of previous experiments shows that the gasification
efficiency was comparable despite the coal quality is lower than that of the previous
experiment.