Three Stage Gasification System for Producing a Gas with Low Tar Content: Concept and Modeling

S. Nilsson, A. Gómez-Barea, D. Fuentes-Cano & P. Ollero
A new staged gasification system for biomass and waste is presented. The process consists in three stages: a fluidized bed (FB) devolatilizer, a non-catalytic tar reformer and a fixed bed of char particles. A model has been developed in Aspen Plus to simulate the system. The model uses kinetics of gas phase reactions from literature and product yields from devolatilization and char gasification reactivities obtained experimentally in a laboratory FB. The model predicts the temperatures...