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Investigation on activated semi-coke desulfurization
Ju Shangguan1, Zhuan-li Li, Chun-hu Li
1Key Laboratory for Coal Science and Technology of Ministry of Education and Shanxi Provice, Institute for Chemical Engineering of Coal, Taiyuan University of Technology, Taiyuan 030024, China. shanggj@public.ty.sx.cn
Journal of Environmental Sciences (China)
|May 20, 2005
Summary
Activated semi-coke effectively adsorbs sulfur dioxide (SO2), offering a promising solution for industrial emissions. This enhanced material boasts higher SO2 adsorption capacity due to increased surface area and specific oxygen functional groups.
Area of Science:
- Materials Science
- Environmental Engineering
- Chemical Engineering
Background:
- Industrial semi-coke is an abundant and inexpensive resource.
- Effective sulfur dioxide (SO2) removal is crucial for environmental protection.
- Developing cost-effective adsorbents for SO2 is an ongoing challenge.
Purpose of the Study:
- To prepare an activated semi-coke for industrial-scale SO2 adsorption.
- To evaluate the SO2 adsorption performance of the prepared activated semi-coke.
- To investigate the characteristics influencing SO2 adsorption capacity.
Main Methods:
- Activated semi-coke was prepared using high-pressure hydrothermal chemistry, HNO3 oxidation, and calcination.
- SO2 adsorption capacity was assessed using a fixed-bed reactor under various temperatures, space velocities, and SO2 concentrations.
- Surface area, elemental composition, and proximate analysis were performed on raw and activated semi-coke samples.
- Fourier-transform infrared spectroscopy (FTIR) was used to identify surface functional groups.
Main Results:
- The activated semi-coke exhibited significantly higher SO2 adsorption capacity compared to untreated semi-coke.
- Increased surface area and the presence of basic oxygen functional groups contributed to enhanced adsorption.
- FTIR analysis suggested that the -C-O-C- group acts as an active center for catalytic SO2 adsorption.
Conclusions:
- The developed activated semi-coke is a highly effective adsorbent for sulfur dioxide.
- The material's enhanced performance is attributed to its optimized surface properties and functional groups.
- This study presents a viable method for utilizing semi-coke in industrial SO2 emission control.