Compared to pyrolysis and gasification of lignocelluloses, generally speaking, the presence of high volatile components as plastics and rubber modifies the reaction kinetics and the waste mechanical behavior during treatment. Therefore we used a mixture of pine wood and PET to simulate the MSW.Both products were dried (at 105_C for 24 hours) and grinded. Nevertheless, as the gasification stage was conducted on pyrolysis char, the raw product properties have no influence on this treatmentsequence.