) and which is characterized by a combination of the following properties which differ
significantly from those of regular coke:
high real density, low reversible thermal expansion and low ash content combined,
in most cases, with low sulfur content.
Note:
Premium coke is mainly produced from tars or residues from petrochemistry by the delayed coking process. Also, refined coal tar pitches are used as precursors for premium coke production.
Source:
PAC, 1995, 67, 473
(Recommended terminology for the description of carbon as a solid (IUPAC Recommendations
1995))
on page 501