Analysis of Hanna II in-Situ Coal Gasification Experiments

摘要

Two interesting results are evident from the material balances presented: (1) A large, unreacted CHAR zone is calculated to remain following gasification, in both cases, and, (2) very little water is calculated to enter into the overall reaction. For Phase I a total of 1143 tons of coal were affected with 493 tons gasified and 649 tons carbonized only. For Phase II, a total of 2124 tons of coal were affected with 830 tons gasified and 1293 tons carbonized. In view of the heterogeneous nature of Hanna coal, the apparent conclusion of a large char zone may be partially offset by differences in the composition of coal actually entering into gasification. However, since coal composition is one of the few parameters which can be measured in a field experiment, uncertainties in this area should be eliminated, so that more abstract parameters such as unreacted char formed may be addressed. (ERA citation 03:054281)