coal-derived pitch coke

https://doi.org/10.1351/goldbook.C01118
The primary industrial solid
carbonization
product obtained from
coal tar pitch
mainly produced in chamber or
delayed coking processes
.
Note:
Coal-derived
pitch
coke
, although it exhibits a pregraphitic microstructure, has often a lower graphitizability than
petroleum coke
. Fractions of coal tar pitches (obtained by
extraction
or
filtration
) may form
cokes
with needle-like structures and have an improved graphitizability. The usually lower graphitizability compared to
petroleum coke
is due to an
inhibition
of
mesophase
growth because of chemical and physical differences of the cokes.
Source:
PAC, 1995, 67, 473. (Recommended terminology for the description of carbon as a solid (IUPAC Recommendations 1995)) on page 485 [Terms] [Paper]