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

Table 2 Cont'd
Run Number A14 c22 C25 C2 6 C27* C28
Coal Type Bitum- Su bbi tu- Subbitu- Subbitu- Subbitu- Subbi tu-
minous minous minous minous minous minous I
1
ac (M) 674* 1123 2300 2300 2300 240 0
0 1.87 1.41 1.55 1.54 1.52
Apparent char 1400 1200 915 909 9 30 920
solid den ity 3
P (kg/m )
s,c
Estimated bubble 0.2 0.2 0.125 0.128 0.226 0.196
fraction. 6
Carbon mass 0.01 0.0012 0.00 15 0.0011 0.0056 0.0023
fraction in
the bed, Yc
=
XNn at bed
surface
(mole ppm)
38 0 50 0 7 17 56 1 - 2 595
BET specific 1.5~10~ 6x105 6x lo5 6x105 6x105
su face of char
5
(m /kg)
1.55 J
6x105
*The char size distribution in the bed for Run No. A14 is assumed to be the same as the
feed size distribution.
**Run No. C27 used staged addition of the combustion air.
256
I
1