When carbon filaments or fibers are formed using a continuous process, the catalyst precursor is generally treated in a reducing environment. The effect of Silicon on the carbon deposition rate was investigated on transition metals/alloys of Fe,Ni and 〈FeNi〉. Silicon was intentionally incorporated into the samples by heating to ≥1000°C in a H2-He mixture (4% H2) in quartz and mullite reactor tubes. When 1 to 2 wt. percent Si is present the carbon deposition rate is substantially decreased, over 〈FeNi〉 alloy foils (≤ 30 wt.% Ni) from 100 to ≤ μg/cm2 min, within the time frame studied. In conclusion a mechanism will be proposed that explains the inhibition for carbon filament formation by the amount of Si present.
|Number of pages||1|
|Journal||American Chemical Society, Division of Petroleum Chemistry, Preprints|
|State||Published - Aug 1995|
|Event||Proceedings of the 210th National Meeting of the American Chemical Society - Chicago, IL, USA|
Duration: Aug 20 1995 → Aug 25 1995