Loading...

Design a Management Process of Special Wastes using Supercritical Water Considering Life Cycle Analysis

Mohseni, Zeinab | 2023

0 Viewed
  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 57291 (46)
  4. University: Sharif University of Technology
  5. Department: Energy Engineering
  6. Advisor(s): Avami, Akram
  7. Abstract:
  8. Oil sludge is the most important waste of the oil industry, which, due to its production, needs to be treated and managed properly. In this research, an integrated process of its gasification in supercritical water environment and Allam cycle is proposed. Then, the necessary investigations are done to purify the syngas to produce clean syngas with hydrogen of more than 40%. This plant is compared with an integrated gasification system and gas turbine in the second scenario. The life cycle analysis of these processes is examined from both environmental and economic aspects. The results show that by using the integrated process of synthesis gas and electricity production, from 841.875 kg/h of oil sludge entering the gasification process with supercritical water, synthesis gas free of sulfur sulfide, including 41. Percentage of hydrogen produced. Using the produced gas in the Allam cycle can produce 7.5 MW of net power. Also, by using the gasification process with steam, syngas with 71% hydrogen is obtained, and by using it in the gas turbine cycle, 405kW of production power can be achieved. The results of the life cycle environmental analysis show that in the integrated system of gasification with supercritical water, the gasification unit with supercritical water has an environmental impact on humans and global warming potential. While in the second scenario the diesel refining unit invests in carcinogenic and non-carcinogenic cancers. The life cycle cost of these processes is estimated at $47.3m and $8.83m, respectively. Among these, 41% of the equipment is related to the gasification section with supercritical water, 32% is related to the Allam cycle and the rest is related to the air separation unit. Economic calculations show that in the mentioned processes with the desired demarcation, the gasification process with supercritical water is profitable
  9. Keywords:
  10. Oily Sludge ; Supercritical Water ; Supercritical Water Gasification ; Life Cycle Assessment ; Allam Cycle Method ; Waste Management

 Digital Object List

 Bookmark

No TOC