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《China Synthetic Fiber Industry》 2006-06
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Influence of carbonization process on polyacrylonitrile-based activated carbon hollow fiber

Sun Junfen, He Chunju, Wang Qingrui (College of Material Science & Engineering, Donghua University, Shanghai 200051)  
Polyacrylonitrile (PAN) hollow fiber was preoxidized for 2 h at 250* in air and carbonized in nitrogen atmosphere to produce PAN-based carbon hollow fiber (PAN-CHF) which was activated in carbon dioxide atmosphere to produce PAN-based activated carbon hollow fiber (PAN-ACHF). The effects of carbonization temperature and time on shrinkages of PAN-CHF and PAN-ACHF,activation yield, specific surface area and adsorption capacity were investigated. The results showed that PAN-CHF and PAN-ACHF had the same shrinkage when the carbonization temperature was 1 000℃; and the specific surface area and adsorption capacity of PAN-ACHF were maximized at 900℃. The carbonization time had no evident effect on the shrinkage of PAN-CHF and PAN-ACHF. The activation yield tended to be upward while prolonging the carbonization time. The specific surface area was increased and then decreased with carbonization time. The specific surface area and adsorption capacity were maximized in 60 min.
【CateGory Index】: TQ342.742
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