The effect of catalyst temperature zoning on hydrotreating a coal-derived liquid

The effect of catalyst temperature zoning on hydrotreating reactions, coke formation, and changes in catalyst surface area and pore volume was examined. A coal liquid was hydrotreated with the top zone operated in the range of 400–500° C (752–932° F) while the lower zone was maintained at 400° C (75...

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Bibliographic Details
Published in:Fuel processing technology 1985-01, Vol.11 (3), p.241-250
Main Authors: Beazer, J.R., Crynes, B.L.
Format: Article
Language:English
Subjects:
Applied sciences
Energy
Exact sciences and technology
Fuel processing. Carbochemistry and petrochemistry
Fuels
Solid fuel processing (coal, coke, brown coal, peat, wood, etc.)
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Summary:The effect of catalyst temperature zoning on hydrotreating reactions, coke formation, and changes in catalyst surface area and pore volume was examined. A coal liquid was hydrotreated with the top zone operated in the range of 400–500° C (752–932° F) while the lower zone was maintained at 400° C (752° F). Increasing the top zone from 400° C (752° F) to 450° C (842° F) had beneficial effects on hydrogenation, HDN, and HDM at no cost of increased catalyst coke content. A further temperature increase was detrimental because of excessive coking and possible thermodynamic equilibrium limitations.
ISSN:0378-3820
1873-7188
DOI:10.1016/0378-3820(85)90003-7