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Exploring new approach for resource utilization of crab shell waste: Optimized microwave torrefaction parameters and
Jianguo Sun1, Qian Liu1, Fei Peng2
1State Key Laboratory of Low-carbon Smart Coal-fired Power Generation and Ultra-clean Emission, School of Energy and Environment, Southeast University, Nanjing, 210096, China.
Journal of Environmental Management
|December 6, 2024
Summary
Crab shell waste can be converted into a valuable fuel using microwave torrefaction. This process enhances its energy content and enables effective in situ sulfur dioxide capture during coal combustion.
Area of Science:
- Waste Management
- Renewable Energy
- Environmental Science
Background:
- Global challenges include finding alternative energy sources and reducing waste impact.
- Crab shells are both environmental pollutants and potential resources.
- Transforming crab shells into clean energy is crucial for pollution reduction.
Purpose of the Study:
- To efficiently treat crab shell waste using microwave torrefaction.
- To optimize torrefaction conditions for derived fuel preparation.
- To evaluate the derived fuel's potential as a fossil fuel substitute and for in situ SO2 capture.
Main Methods:
- Microwave torrefaction was employed to treat crab shell waste.
- Response surface methodology was used to optimize torrefaction conditions (2500 W microwave power, 225°C, 11 min).
- The derived fuel was tested as a coal substitute and desulfurization agent.
Main Results:
- Optimized torrefaction increased specific surface area by 21.2% and high heating value from 14.41 to 18.18 MJ/kg.
- Combustion and desulfurization performances significantly improved.
- Desulfurization capability increased by 16.6%, reducing SO2 emissions by 85.27% at a 35% blend ratio.
Conclusions:
- Microwave torrefaction is an efficient method for converting crab shells into valuable fuel.
- Crab shell derived fuel offers superior in situ SO2 capture compared to conventional methods.
- This study presents a promising strategy for sustainable waste utilization and disposal.
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