Grounded and pulverized gilsonite was sieved by using a
200 mesh sieve. The particle-size distribution (PSD) was measured
at a Malvern equipment reference Mastersizer 2000.
Elemental analysis was carried out to determine carbon,
sulphur, nitrogen, hydrogen and oxygen content in gilsonite and CB,
by using a LECO elemental analyser. Carbon, hydrogen and nitrogen