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Received November 4, 2003
Accepted April 8, 2004
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Advantages of Counter-current Operation for Hydrodesulfurization in Trickle Bed Reactors
Department of Chemical Engineering, Nagoya University, Chikusa, Nagoya 464-8603, Japan
Korean Journal of Chemical Engineering, July 2004, 21(4), 773-776(4), 10.1007/BF02705519
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Abstract
The deep desulfurization of oil fraction is a central matter of concern to every refinery. Hydrogen sulfide is the product of hydrodesulfurization reaction and it is the inhibiter of the reaction. When products inhibit the reaction, the counter-current operation is expected to have an advantage over the co-current operation. Hydrodesulfurization of vacuum gas oil in a trickle bed reactor was simulated for both models of co-current operation and counter-current operation. The models were simulated on high and low gas and liquid velocities. Hydrogen sulfide was affected by mass transfer resistance in both gas-liquid and liquid-catalyst interface. The other component mass transfer resistances were negligible. When the deep desulfurization was required, simulation results showed that the counter-current operation was superior to the co-current operation in organic sulfur conversion.
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References
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