Kinetic Studies of Hydrodesulfurization of Vacuum Distillate
DOI:
https://doi.org/10.31699/IJCPE.2009.1.8Abstract
Vacuum gas oil (611-833)K was distilled from Kirkuk crude oil, which was obtained by blending the following fraction,
light vacuum gas oil (611 - 650) K, medium vacuum gas oil (650-690)K, heavy vacuum gas oil (690-727)K and very
heavy vacuum gas oil (727-833)K.
The vacuum gas oil was hydrotreated on a commercial cobalt-molybdenum alumina catalyst presulfied at specified
condition in a laboratory trickle bed reactor. The reaction temperature varied from (583-643)K over liquid hourly space
velocity ranging between (1.5-3.75)h-1 , Hydrogen pressure was kept constant at 3.5 MPa with a hydrogen to oil ratio
of about 250 L/L
The conversion results for desulfurization appeared to obey the second order kinetics. According to this model rate
constants for desulfurization reaction were calculated. Finally, the apparent activation energy (Ea), enthalpy of
activation ( H*) and entropy ( S*) were calculated based on the values of rate constant (k). The calculated values of
Ea, H* and S* were 74.657 kJ/mole, 74.712 kJ/mole and 167.132 J/mole.k, respectively.
References
- Speight, J. G. and “The Desulfurization of Heavy Oil and Residua” ,1981.
- Speight, J. G. and Moschoped, S. E. ACS Preper., Dev. Pet. Chem.,1979:24:910.
- Chu, C. I. and Wang I., Ind. Eng. Chem. Process. Des. Dev.,1982:21:338.
- Mohammed, A-H. A-K. and Hankish K., J. Petrol. Res. 1985:4(2):37.
- Hummadi, K. K.,Ph. D. Thesis, Baghdad University 1999.
- Arey, W. F. Jr., Balckwell, N. E., and Reichle, A. D. Seventh world Petroleum Congress 1968:4:167.
- Mohammed,A-H. A-K. and Hankish K. and Abbas K., Fuel, 1988:6(6):593.
- Parayannakos N., Applied Catalysis, 1986:24:99.
- Henry H. C. and Gilbert J. B., I&EC Proc. Dev., 1973:12(3):328.
- Flin, R. A., Benther, H. and Schmid, E. K., Petroleum Refiner, 1961:40(4):140.
- Hochman J. M., Efforn E., I&EC. Fund., 1969:8:63.
- Mohunta D. M. and Laddha G. S., Chem. Eng. Sci., 1956:20:1069.
- Mears D. E. and Hulburt H. M., Chem. React. Eng., ACS, Monograph Series,1974:123:218.
- Areff, H. A., Ms. Sc.Thesis, Tikrit University 2001.
- Mohammed, A-H. A-K., and Hankish, K., Fuel , 1985:July:vol.64:921-24.
- Mann, R. S., Sambi, I. S., and Khulbe, C. K., Ind. Eng. Chem. Reas. 1988:27:1788-92.
- Rahman, A. M., Ms. Sc., Thesis, Baghdad University 2000.
Downloads
Published
Issue
Section
License
This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.
