[01] Jamal Sadeghi, Department of Petroleum Engineering, Fars Science and Research Branch, Islamic Azad University, Marvdasht, Iran;Department of Petroleum Engineering, Marvdasht Branch, Islamic Azad University, Marvdasht, Iran. [02] Farshad Farahbod, Department of Chemical Engineering, Firoozabad Branch, Islamic Azad University, Firoozabad, Iran.

In its strictest sense, petroleum includes only crude oil, but in common usage it includes all liquid, gaseous, and solid hydrocarbons. Under surface pressure and temperature conditions, lighter hydrocarbons methane, ethane, propane and butane occur as gases, while pentane and heavier ones are in the form of liquids or solids. Crude oil, liquid petroleum that is found accumulated in various porous rock formations in Earth’s crust and is extracted for burning as fuel or for processing into chemical products. Although it is often called "black gold," crude oil has ranging viscosity and can vary in color to various shades of black and yellow depending on its hydrocarbon composition. At the beginning, the molybdenum nano particles (with the average size of 75-89 nano meter) are synthesized and then is added to crude oil. The some physical properties of light and heavy oil is evaluated, finally. The changes in viscosity, recovery %, asphaltene precipitation are surveyed in various temperature and pressure. Results are shown in Figures and the optimum values of properties are introduced.

Crude Oil, Temperature, Black Gold, Fuel, Composition

[01] Shadi WH, Mamdouh TG, Nabil E. Heavy crude oil viscosity reduction and rheology for pipeline transportation. Fuel 2010; 89: 1095–100. [02] Martnez-Palou R, Mosqueira ML, Zapata-Rendón B, Mar-Juarez E, Bernal-Huicochea C, Clavel-Lpez JC, et al. Transportation of heavy and extra-heavy crude oil by pipeline: a review. J Pet Sci Eng 2011; 75: 274–82. [03] Weissman JG. Review of processes for downhole catalytic upgrading of heavy crude oil. Fuel Proc Technol 1997; 50: 199–213. [04] Rana MS, Samano V, Ancheyta J, Diaz JAI. Review of processes for downhole catalytic upgrading technologies for upgrading of heavy oils and residua. Fuel 2007; 86: 1216–31. [05] Naseri A, Nikazar M, Mousavi DSA. A correlation approach for prediction of crude oil viscosities. J Pet Sci Eng 2005; 47: 163–74. [06] Hossain MS, Sarica C, Zhang HQ. Assessment and development of heavy-oil viscosity correlations. In: SPE International Thermal Operations and Heavy Oil Symposium, Kalgary, 1–3 November 2005. p. 1–9. [07] Alomair O, Elsharkawy A, Alkandari H. Viscosity predictions of Kuwaiti heavy crudes at elevated temperatures. In: SPE Heavy Oil Conference and Exhibition, Kuwait, 12–14 December 2011. p. 1–18. [08] Barrufet MA, Setiadarma A. Reliable heavy oil-solvent viscosity mixing rules for viscosities up to 450 K, oil-solvent viscosity ratios up to 4 _ 105, and any solvent proportion. Fluid Phase Equilib. 2003; 213: 65–79. [09] Yuxiao Niu, Mingyang Xing, Baozhu Tian, Jinlong Zhang. Improving the visible light photocatalytic activity of nano-sized titanium dioxide via the synergistic effects between sulfur doping and sulfation. Applied Catalysis B: Environmen. 2012; 115–116 (5): 253-260. [10] Rao Mumin, Song Xiangyun, Cairns Elton J. Nano-carbon/sulfur composite cathode materials with carbon nanofiber as electrical conductor for advanced secondary lithium/sulfur cells. J. Power Source. 2012; 205 (1): 474-478. [11] Zhang Yongguang, Zhao Yan, Konarov Aishuak, Gosselink Denise, Soboleski Hayden Greentree, Chen P. A novel nano-sulfur/polypyrrole/graphene nanocomposite cathode with a dual-layered structure for lithium rechargeable batteries, J. Power Source. 2012; 241 (1): 517-521. [12] Hosseinkhani M., Montazer M., Eskandarnejad S., Rahimi M. K. Simultaneous in situ synthesis of nano silver and wool fiber fineness enhancement using sulphur based reducing agents, Colloids and Surfaces A: Physicochem. Eng. Aspect. 2012; 415 (5): 431-438.