Actions for Catalytic upgrading of solvent-refined lignite using hydrogen sulfide and prepared iron oxide-supported catalysts

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Catalytic upgrading of solvent-refined lignite using hydrogen sulfide and prepared iron oxide-supported catalysts

Author
Jones, F. A.
Published
United States : [publisher not identified], 1985
Springfield, Va.: National Technical Information Service, [approximately 1985]
Physical Description
microfiche : negative ; 11 x 15 cm
Additional Creators
Radonovich, L. J. and Rindt, J. R.

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Summary
This paper discusses a catalytic system, H2S-iron system that shows promise as an economical means of upgrading the heavy product from low-temperature direct liquefaction of low-rank coal. Four conclusions can be drawn from this study: (1) Product quality during catalytic upgrading with the H2S-iron system was increased significantly at 420/sup 0/C when compared with 360/sup 0/C. (2) When H2S and iron catalyst were not present in the system, thermal treatment of the soluble residuum at 420/sup 0/C had no measurable beneficial effect. (3) Hydrogen sulfide worked primarily through the distillate. (4) Iron worked primarily through the heavy fraction of the recycle solvent. The mechanism involved hydrogen addition, as was evidenced by the increased H/C ratio. When these observations are added to previously reported data which indicated that added H2S improves distillate yield, lowers gas yield, and improves operability in CPU recycle operation, it suggests that H2S acts directly with the lighter fractions of the recycle solvent. In doing this H2S acts to improve solvent quality, which indirectly improves conversion of the heavier fractions. This type of solvent quality enhancement can explain the lower gas yield associated with added H2S. It also supports the previously referenced data which indicated that when iron additives were added during recycle operation, with no added H2S, product quality as measured by H/C ratios was improved but operability was not. This preliminary evaluation of H2S-iron catalysis points to additional areas for research, in both catalyst systems and their applications. 16 refs., 8 figs., 5 tabs.
Report Numbers
DE85009857; DOE/FE/60181-131; CONF-850942-5
Other Subject(s)
Collection
NTIS collection.
Note
DOE contract number: FC21-83FE60181
OSTI Identifier 5538420
Research organization: North Dakota Univ., Grand Forks (USA). Energy Research Center.
View MARC record | catkey: 47351522