Citation: ZHANG Li-qiang, JIANG Hai-tao, MA Chun-yuan, Dong Yong. Microwave regeneration characteristics of activated carbon for flue gas desulfurization[J]. Journal of Fuel Chemistry and Technology, ;2012, 40(11): 1366-1371. shu

Microwave regeneration characteristics of activated carbon for flue gas desulfurization

1.
National Engineering Laboratory for Coal-Fired Pollutants Emission Reduction, Shandong University, Jinan 250061, China

Corresponding author: Dong Yong,
Received Date: 6 June 2012
Available Online: 13 August 2012
Fund Project: 国家自然科学基金(51206097) (51206097) 山东省科学技术发展计划(2009GG2GC06003)。 (2009GG2GC06003)

Microwave regeneration of SO₂-loaded activated carbon (AC) and its consequent adsorption characteristics were studied. The effects of microwave regeneration on the pore texture and surface chemistry of activated carbon were examined by scanning electron microscopy, low-temperature N₂ adsorption, elemental analysis and Boehm titration, and its effect on the adsorption of SO₂ contained in flue gas passing over activated carbon was analyzed. The results show that increasing microwave regenerative power produces a narrower SO₂ regeneration curve with higher peak concentrations, which aids both the regeneration of activated carbon and recovery of a high concentration of SO₂. The carbon pores become elongated during the regeneration process. With increasing microwave power, the micropore specific surface area, volume, and the proportion of surface acidic functional groups all increase, while the surface alkaline functional groups decrease. Incomplete regeneration occurrs at 100 W due to the inhibiting effect of residual H₂SO₄ on adsorptive capacity. At 200, 300 and 400 W, the adsorptive capacity for SO₂ exceeds that of the original AC.
- activated carbon,
- microwave regeneration,
- pore texture,
- surface functional groups,
- SO₂
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