Effect of sulfiding on an unsupported hydrotreating catalyst

Journal Article · Sun Sep 01 00:00:00 EDT 1991 · Journal of Catalysis; (United States)

DOI:https://doi.org/10.1016/0021-9517(91)90348-8· OSTI ID:5571897

Ho, T C ^[1]

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1. Exxon Research and Engineering Co., Annandale, NJ (United States)

It is well known that sulfiding plays a very important role in determining the performance of commercial hydroprocessing catalysts. Recently, Ho and Reyes described the sulfiding behavior of an unsupported catalyst derived from tris(ethylenediamine) cobalt molybdate, or Co(NH{sub 2}CH{sub 2}CH{sub 2}NH{sub 2}){sub 3}MoO{sub 4}. This water soluble metallate upon sulfiding shows very high volumetric activities for both hydrodesulfurization (HDS) and hydrodenitrogenation (HDN). A major finding in Ho and Reyes study is that gas (H{sub 2}S/H{sub 2}) sulfiding of this bulk catalyst is accompanied by significant hot spotting, much more so than sulfiding of commercial catalysts. They developed a mathematical model for predicting the speed and magnitude of the traveling thermal wave. At the conditions used by Ho and Reyes, the model calculated that the catalysts could be some 20 C hotter than the gas, and the H{sub 2}S level could drop from 10% at the reactor inlet to as low as 0.5% at the outlet. This study was carried out to get some idea on the extent to which the activity of the bulk catalyst is affected by presulfiding conditions. The comparative experiments were done under somewhat exaggerated conditions.

• OSTI ID: 5571897
• Journal Information: Journal of Catalysis; (United States), Vol. 131:1; ISSN 0021-9517
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
CATALYSTS
SULFIDATION
COBALT COMPOUNDS
CATALYTIC EFFECTS
PETROLEUM PRODUCTS
DESULFURIZATION
API GRAVITY
DENITRIFICATION
HYDROGEN
HYDROGEN SULFIDES
HYDROGENATION
MATHEMATICAL MODELS
ORGANOMETALLIC COMPOUNDS
SURFACE AREA
CHALCOGENIDES
CHEMICAL REACTIONS
DENSITY
ELEMENTS
HYDROGEN COMPOUNDS
NONMETALS
ORGANIC COMPOUNDS
PHYSICAL PROPERTIES
SULFIDES
SULFUR COMPOUNDS
SURFACE PROPERTIES
TRANSITION ELEMENT COMPOUNDS
020400* - Petroleum- Processing