Interactions between CO_2 and H_2O on char structure evolution during coal char gasification

摘要

1. The gasification of demineralized coal with CO_2 mainly occurred on the exterior surface of char, and some new micropores were created 2. The reaction of demineralized coal gasification with H_2O was prone to diffuse inside of the char matrix, and the diameter of the pore was enlarged 3. The gasification reaction of demineralized coal with H_2O/CO_2 both occurred on the surface and inside of char, not only some new pores were created, but the diameter of pore was also expanded 4. More reaction sites were created for H_2O gasification under CO_2 atmosphere, H_2O gasification can facilitate CO_2 diffuse into char matrix.