This report describes the work performed during the fifth quarter of the contract. During this quarter, parametric studies were conducted with the newly developed pulsating coal gasification code. Solutions were obtained by assuming that (1) initially the raw coal particles were uniformly distributed throughout the gasifier and (2) initially the raw coal particles were present only in the inlet section of the gasifier. Also, the effect of the following parameters were investigated: (1) the inlet gas temperature, (2) the inlet particle temperature, (3) the mass flow rate entering the gasifier, and (4) the coal particle loading at the gasifier inlet. The results of these various studies are presented and discussed in this report. Also, during this quarter the detailed design of the gasifier to be used in the experimental phase of this program was completed and the details are presented in this report. 2 refs., 10 figs.