Abstract:

The hydrogen donating abilities of three fractions of atmospheric residue (FA, FB, and FC) were evaluated and the FB fraction was chosen as the best hydrogen donor. The impacts of FB on atmospheric residue thermal upgrading process was studied under different reaction conditions. The results show that the relative hydrogen donating ability has the order of FB>FC>FA. Compared with conventional thermal cracking, the coke induction period extends 3-4.5 min, the spot test rate of upgrading oil reduces by 1-2 grades(420 ℃,20-40 min). The density of upgrading oil decreases significantly as time and temperature increase in hydrogen donor upgrading process. Besides, the total viscosity reduction rate of thermal upgrading oil with hydrogen donor is 1.14-1.40 times of net viscosity reduction rate with light fraction blending.

Key words: oil sands bitumen, hydrogen donor, fraction, hydrogen donation index, upgrading