N. Panariti et al., Petroleum residue upgrading with dispersed catalysts Part 2. Effect of operating conditions, APP CATAL A, 204(2), 2000, pp. 215-222
The hydrotreatment of a petroleum residue in the presence of dispersed moly
bdenite was carried out within a wide range of operating conditions and cat
alyst loading. The effect of reaction severity as well as of molybdenum con
centration on product distribution and quality was studied. Based on the ex
perimental results, a simplified reaction scheme was proposed. The hydropro
cessing of the residue was described in terms of the competition between tw
o reactions: the direct conversion of the feedstock to distillate and coke,
and the catalytic hydrogenation. Compared to thermal conditions, the prese
nce of dispersed molybdenite controls very well coke formation; however, a
trend of increasing formation of solids was observed at high catalyst conce
ntrations. The overall upgrading of the feedstock requires significant amou
nts of molybdenum as well as relatively high hydrogen pressure. (C) 2000 El
sevier Science B.V. All rights reserved.