Loading...

Theoretical and Practical Effects of Ultrasound on Desulfurization Process

Makarem, Mohammad Amin | 2013

819 Viewed
  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 44155 (06)
  4. University: Sharif University of Technology
  5. Department: Chemical and Petroleum Engineering
  6. Advisor(s): Ghotbi, Siroos; Taghikhani, Vahid; Badakhshan, Amir
  7. Abstract:
  8. In past three decades, use of crude oil’s derivatives increased dramatically. The critical environmental condition of today’s world, which majorly caused by unclean fuels, forces governments to legislate new rules to increase quality of fuels. These rules force refinery industries to produce clean fuels. One of the main processes in producing clean fuels is Desulfurization process. For fuel desulfurization there are different kinds of processes like HydroDesulfruization, Oxidative Desulfurization, Bio-desulfurization, etc. From these processes Hydro-desulfurization is the conventional process for desulfurization. Because of significant problems of this process, like high operational cost, high Hydrogen consumption, needs of high pressure and temperature, finding new applicable processes is obligatory.
    One of the new and applicable desulfurization processes is oxidative desulfurization process. Although this process has some advantages, like low operational temperature and pressure, simple instrument and ability to oxidize thiophenes from fuels, it has some major problems like, low desulfurization percentage and low reaction rate. To defeat these problems we used ultrasonic assisted oxidative desulfurization process. First of all we needed to see the ability of ultrasound waves to ease the ODS process. So we ran some basic tests to see the effects of ultrasound waves on reaction rate and emulsions. Then we ran experiments on lab scale setup to see the ability of this process to make clean diesel fuel. After these tests we design new experiments to see the conditions which are necessary to scale up ultrasonic systems. Then we designed a semi-pilot UAODS setup and tested the setup to see the applicability of new designed setup. Finally by the concepts which used in Process Intensification, we modeled the cavitations bubble as a high pressure micro-scale reactor. The results of modeling show the physical effect of pressure drop on velocity, composition, temperature and pressure in different grids of the reactor
  9. Keywords:
  10. Desulfurizing ; Upscaling ; Ultrasonic Waves ; Cavitation Bubble

 Digital Object List

 Bookmark

No TOC