Benefit of Channel Availability In An Underground Coal Gasification Laboratory Scale

The benefit of gasification channel availability in an underground coal gasification experiment is investigated in laboratory. The experiment is conducted using a simulation rectangular reactor made of steel. There are two experiments conducted in this study: the first experiment is without gasification channel and the second experiment with a gasification channel inside the reactor. The result of the experiments shows that the amount of CO2 gas is in the range of (4,6-11,4)% and (11,6-14,4)%; CO gas is in the range of (0,3-4,0)% and (1,2-6,8)%; H-2 gas is in the range of (0,12,5)% and (1,6-3,2)%; C3H8 gas is in the range of (0,0-0,6)% and (0,2-0,9)%; CH4 gas in the range of (0,0-2,2)% and (0,4-3,0)%, CnHm gas in the range of (0,0-0,0)% and (0,0-0,4)% for the first and the second experiment respectively. The caloric value of gas is in the range of (81-343) kcal/m(3) and (263-516) kcal/ m3 respectively. The range of temperature development during the gasification process shows that: in the first experiment, the range of gasification temperature T-1 is (335-565)C-o; and T-2 is in the range of (110-240)C-o. On the other hand, T-1 from the second experiment is in the range of (550705)C-o and T-2 is in the range of (160-628)C-o. Besides that in the first experiment, the pattern of T-1 dan T-2 changing has a decreasing tendency, while in the second experiment, it has an increasing tendency in relation with the progress of gasification process. It can be concluded that the availability of gasification channel in the second experiment allows the gasification reactions occur more efficiently compared with the reactions in the first experiment without the channel inside.