Geology Reference
In-Depth Information
H
H
A
NH
High volatile
bituminous coal
S
Tm
R
No
tricyclics
S
M
R
S
R
S
Ts
R
BNH
S
R
H
NH
B
Tm
Coal distillate
generation
temperature
1000 °C
M
S
R
No
tricyclics
S
R
S
BNH
R
S
Ts
R
S
R
C
No
tricyclics
H
Coal tar
generation
temperature
500 °C
S
R
NH
Ts
Tm
D
Coal tar
generation
temperature
1000 °C
No
tricyclics
H
NH
E
No
tricyclics
Coke
generation
temperature
1000 °C
H
Retention time
Figure 11.4.8. Triterpane fingerprints (GC/MS
191) of high-volatile bituminous coal under various states of
thermal exposure: (A) the high-volatile bituminous coal contains triterpanes with high proportions of H and lesser
amounts of NH, Tm, M, and homohopanes with higher proportions of
m
/
z
, (B) coal distillates formed at
500°C (not shown) and 1000°C resemble the coal, but with higher abundances of Tm, NH, and M relative to H, (C)
coal tar generated at 500°C demonstrates triterpane destruction, (D) coal tar generated at 1000°C demonstrates
even greater triterpane destruction, and (E) coke demonstrates the near complete destruction of triterpanes.
S
relative to
R
