"A survey and comparison has been made of forward combustion gasification models that are available in the public domain. The models studied range in complexity from a simple constrained mass balance model to a two-dimensional unsteady-state model. The computer code for each model has been obtained and implemented on the University of Wyoming CDC CYBER 730/760 computer system. Analyses were computed with each of the programs using data (taken primarily from the LLNL data base) to simulate representative DOE sponsored field experiments at Hanna, Hoe Creek, Rawlins, and Pricetown. This study provides a direct comparison of input data requirements, computational capabilities, and computer time requirements for the various codes. It furnishes an indication of the applicability of each model to the various conditions occurring in the different field tests."