the coking properties of coal at elevated pressures. - Argonne ...

xk
yC
z
Z
5
Mole fraction of species k
Mass fraction of char in the bed
Distance above the distributor (m)
Distance above the bed surface (m)
Volume fraction of particles ejected per bursting bubble
Bed voidage at minimum fluidization
Local density of stone and char particles, respectively, at free-
board height Z, (kg/m3)
3
Gas density (kg/m )
Solid densities of Stone and char, respectively (kg/m
3
)
Bubble volume fraction
Geometric standard deviations of fresh coal particles, bed particles
and char particles, respectively
TABLE 1. ANALYSIS OF COALS
Analysis Bituminous, Arkwright, Subbituminous, Colstrip Mine,
(wt %) Pittsburgh Seam Rosebud Seam, Rosebud County, MT
Proximate (as received)
moi stu re 1 .6
ash 8.01
volatile matter 33.93
fixed carbon 56.46
U 1 ti mat e
C
H
N
S
0
ash
(daf)
76.36
5.23
1.47
2.61
5.26
254
(as received)
19.19
8.29
2a .74
43.78
(dry)
67.80
4.45
1 .oo
.59
15.91
10.25