Co-gasification properties of coal char and biomass char

An experimental study on the co-gasification property of coal char and biomass char with steam was performed in a thermogravimetric analyzer (TGA). The coal tested was Jincheng anthracite (JC), and the biomass was meat and bone meal (MBM). The chars were prepared by fast pyrolysis of coal and MBM individually. The morphology and composition of chars were analyzed by scanning electron microscope (SEM) equipped with an energy-dispersive X-ray analyzer (EDX). The results show that the co-gasification rate of JC/MBM chars mixture is higher than that of results expected from independent behavior. The high content of Ca and Na in MBM char plays a catalytic effect during co-gasification. After washing with acid, the reactivity of MBM char declines markedly. The gasification rate of coal char in JC/MBM chars mixture increases with increasing MBM char content in rang of 20%~80%.