Deactivation of hydrotreatment catalysts used for coal liquids: Semi-annual report, 12 May 1988--11 November 1988

Technical Report · Fri Jan 01 04:00:00 UTC 1988

DOI:https://doi.org/10.2172/6088818· OSTI ID:6088818

Dadyburjor, D. B.

Coal liquid hydrotreatment catalysts deactivate rapidly due to deposition of coke and metals inside the pores of the catalyst particles. The deactivation can be due to the gradual choking of the catalyst pores and/or due to the suppression of active sites on the catalyst. The objective of the proposed work is to determine which of these two mechanisms of deactivation is predominant, and this done by using the Constant Deactivation Arrhenius Plot (CDAP) technique. The Catalysts Co-Mo/Al/sub 2/O/sub 3/ and Ni-Mo/Al/sub 2/O/sub 3/ which have previously been deactivated to different extents in run number 242 at Wilsonville's coal liquefaction facility, are used in this study. The hydrodesulfurization of thiophene, which does not deactivate the catalyst, is used to characterize the relative activities of these catalysts. Arrhenius plots for these catalysts are being obtained. From the Arrhenius plots, the CDAP technique determines the intrinsic reaction rate constants and the effective diffusivities for each of these catalysts. 1 fig., 2 tabs.

• Research Organization: West Virginia Univ., Morgantown (USA). Dept. of Chemical Engineering
• DOE Contract Number: FC22-88PC79808
• OSTI ID: 6088818
• Report Number(s): DOE/PC/79808-T2; ON: DE89014725
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010405* -- Coal
Lignite
& Peat-- Hydrogenation & Liquefaction
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
ARRHENIUS EQUATION
CATALYSTS
CHALCOGENIDES
CHEMICAL REACTIONS
COAL LIQUEFACTION
COAL LIQUIDS
COBALT
DEACTIVATION
DESULFURIZATION
DOCUMENT TYPES
ELEMENTS
EQUATIONS
FLUIDS
HETEROCYCLIC COMPOUNDS
LIQUEFACTION
LIQUIDS
METALS
MOLYBDENUM
NICKEL
ORGANIC COMPOUNDS
ORGANIC SULFUR COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PROGRESS REPORT
STABILITY
THERMOCHEMICAL PROCESSES
THIOPHENE
TRANSITION ELEMENTS