Effects of Included Minerals in Pulverized Coals on the Pore Structure of Chars
ZHANG Hong
LI Ying
HA Si
LI Huan
SUN Ming
Abstract：Two fraction coals of low density and medium density, were separated from each of the four pulverized coals with a float-sink procedure. The petrographic composition of all the fractions was analysed. They were then devolatized in a muffle funnace and drop tube furnace. SEM was employed to observe the char morphology and gas adsorption study was used to de-termine their surface area and pore volume. The results show that the contents of liptinite and vitrinite are higher in the low density fractions while the content of inertrite is higher in the me-dium density fractions. For chars prepared in the muffle furnace, the included minerals acted as pore producer. For chars prepared in the drop tube furnace, the role of included minerals changed with rank of the coals. For anthracites, the included minerals acted as pore producer. For bituminous coals, they limited the formation of high porous structure. The interaction be-tween mineral matter and metaplast under different conditions was analyzed, and the influen-cing mechanism of mineral matter on char structure was indicated.
Keywords：mineral matterchar structuremetaplast
Publication Date：2009-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 810-814 )