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Superstructure Optimization of CO2 Capture, transport, and Utilization in Industrial Symbiosis Networks

Shah Mohammadi, Amir | 2023

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 56177 (46)
  4. University: Sharif University of Technology
  5. Department: Energy Engineering
  6. Advisor(s): Roshandel, Ramin
  7. Abstract:
  8. CO2 capture and utilization (CCU) is a promising approach to reduce and control emissions from the industry and energy sector, while also creating new jobs and value-added products. However, one of the main barriers to the widespread adoption of CCU is the high investment and operating costs, which limit its implementation to mostly government-supported research projects. To overcome this barrier, structural optimization and identification of optimal routes and formation of industrial symbiosis networks are needed. In this research, we developed a comprehensive superstructure that includes sources and sinks (in a case study), CO2 capture and separation material and technology combinations (13 combinations), transfer methods (pipeline and road transport) and conversion and utilization pathways (15 pathways). We then formulated this superstructure as a mixed integer linear optimization problem (MILP) and optimized it with the objective function of maximizing net present value (NPV) over a 25-year time horizon under three scenarios with different emission reduction goals. The optimization results show that a 50% reduction in net emissions can be achieved by capturing and utilizing 12.4 million tons of CO2 per year from 4 sources and in 6 conversion pathways, but the NPV over 25 years is -2.5 billion US dollars. We then performed sensitivity analysis on the simulator parameters of carbon tax, commodity subsidy (for products derived from CO2 utilization pathways) and reduction of investment and operating costs (due to technological progress) and examined their effects on the economic aspects of CCU. We found that to reach a zero NPV over 25 years with a 50% net emission reduction goal, the minimum required carbon tax is 20.26 dollars per ton of net CO2 emission reduction. Alternatively, without a carbon tax, this goal can also be achieved a 36% reduction in investment and operating costs due to technological advancement
  9. Keywords:
  10. Carbon Dioxide Absorption ; Superstructure Optimization ; Carbon Tax ; Industrial Symbiosis ; Carbon Dioxide Capture and Utilization ; Carbon Dioxide Emission ; Mitigation

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