Activated carbon fibers (ACF) were prepared from poly(acrylonitrile) (PAN) precursor fibers by two methods: steam activation at 650-1000 °C and KOH activation at 600-800 °C. Steam activation yielded relatively poorly developed porosity regardless of the activation temperature, maintaining a low surface area (around 700 m2 g-1) at very high burn-off, while KOH activation provided high porosities above 700 °C. However, at ratios of KOH to fiber greater than 1:1 wt/wt, the fiber morphology was destroyed. The SO2 conversion activity of the ACF was studied in the presence of oxygen and water. The activity was higher for as-produced KOH-activated samples (approximately 9 μmol SO2 g-1 min-1) than for steam activated fibers (approximately 4 μmol SO2 g-1 min-1), and correlated with lower oxygen content in the product fibers. The ACF were also used to manufacture composites. Composites retain the catalytic activity of the parent ACF.
|Number of pages||9|
|State||Published - May 2001|
Bibliographical noteFunding Information:
This work was funded by the Fossil Energy AR&TD materials program (SC19X-SN719C) and by the University of Kentucky — Center for Applied Energy Research. The authors also thank Danny Turner, Craig Fowler and Lucı́a Ballester for their valued help.
ASJC Scopus subject areas
- Chemical Engineering (all)
- Fuel Technology
- Energy Engineering and Power Technology
- Organic Chemistry