UPGRADING SOLVENT REFINED COAL BY CATALYTIC HYDROTREATMENT.

摘要

Catalytic hydrotreatment was performed to upgrade SRC-II Vacuum Flash Feed(VFF) and Light Ends Column Feed(LECF) which were produced from the Pittsburg and Midway Coal Mining Company's SRC-II pilot plant.;The statistical studies on the metal effects showed that Co, Mo, and W significantly increased the catalyst activity for the denitrogenation of both SRC-II coal liquids. The adding of Ni appeared to be ineffective. The effect of Co and Mo on the desulfurization of LECF was positive. The interaction between Co and Mo gave a negative effect on the denitrogenation of both liquids and on the desulfurization of LECF. The interactive effects of Co-W and Mo-W were negative for the SRC-II VFF denitrogenation and desulfurization, respectively.;The catalyst deactivation was observed and modernated by starting at a lower temperature and higher space velocity. The catalyst was poisoned by the carbon laydown, whose mechanism appeared to be pore mouth plug-up.;Catalyst C-49 with metal combination of 4% CoO, 8% MoO(,3), 1% NiO, and 8% WO(,3) proved to reduce the nitrogen content to as low as 0.3 wt% for 104 hours with an average liquid product recovery of 91 wt%. The yield of 50-204(DEGREES)C boiling range gasoline was 40% of the liquid product, whose octane tests gave an average octane number of (Research + Motor)/2 = 81.7.;The liquid products were analyzed for sulfur and nitrogen content. The distillation yields were also determined.