A coal and municipal solid waste(MSW) serial compound gasification process is investigated. Taking sawdust as an example

a semi-empirical dynamic model of the serial compound gasification process is established and the effects of key parameters such as gasification temperature

mass ratio of steam to MSW(S/M) and mass ratio of MSW to coal(M/C) on the gasification law are studied

by using the measured multi-zone temperature of gasifier connected with hydrodynamics and gasification reaction dynamics. The result shows that

the gasification process uses steam gasification without external heat source

which can produce medium-calorific value syngas.Enhancing the gasification temperature is favorable to the gasification results

the optimal gasification temperature is 1 010 ℃ and the most suitable S/M is 1.4. The M/C value should be increased as much as possible in this gasification process

and the optimal M/C value is 4.0 in this model. The research can offer reference and theoretical basis for operation and optimization of the serial compound gasification process.