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Effect of Operating Condition on the Quality of Products from the Thermal Cracking of Vacuum Residue

Safiri, Amir | 2014

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 46119 (06)
  4. University: Sharif University of Technology
  5. Department: Chemical and Petroleum Engineering
  6. Advisor(s): Khorashe, Farhad; Ivak Pour, Javad
  7. Abstract:
  8. Crude oil is naturally not applicable to the refining processes to obtain important products. Most of the crude oil refining process produce heavy hydrocarbons that are not used much in the same way. More refineries are looking for a process to remove the heavy components and converts these materials into valuable material. There are different process for upgrading heavy residual oil. One of the main processes in residual upgrading is Delayed Coking. The high flexibility to the different feeds and no need for a catalyst, causing a shift in the approach to the refinery for processing heavy crude oil by Delayed Coking. The aim of this project is calculated the sulfur content and and yield of liquid products and coke by changing the pressure and temperature. The feed that used is vacuum residue bottom of one the unit of Abadan refinery. This work is done by delayed coking method in temperature 440, 460, 480 and 500 degree centigrade and pressure of atmospheric, 2 and 4 barg. In addition, the effect of nanaoparticles as additives during thermal cracking is investigated in the autoclave. Yield of liquid product increases with increasing temperature at constant pressure and weight yield of coke production declined. So that in some cases there has been a 10% incease. Also, with increasing pressure at constant temperature, yield of liquid decrease and yield of coke increase. Increasing temperature at constant pressure leads to an increase in weight of the liquid product sulfur and reduced the coke production sulfur. But increasing the pressure from atmospheric to 4 barg reduced 0.5% sulfur content of coke. Add nanoparticles of iron oxide and aluminium oxide in different ppm at optimal point cause to increasing liquid yield and decresed the sulfur content of liquid and coke produced. Due to the yield of liquid and gas and economic benefit, aluminium oxide 100 ppm is the most appropriate option
  9. Keywords:
  10. Thermal Break ; Vacuum Residue ; Additives ; Delayed Coking ; Petroleum Coke

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