ROLE OF SULFUR IN THE PRODUCTION OF CARBON-FIBERS IN THE VAPOR-PHASE
ROLE OF SULFUR IN THE PRODUCTION OF CARBON-FIBERS IN THE VAPOR-PHASE
复制标题
DOI：
10.1016/0008-6223(94)90074-4
复制
发表时间：
1994-01-01
期刊：
影响因子：
10.9
通讯作者：
ALIG, RL
中科院分区：
文献类型：
--
作者：
TIBBETTS, GG;BERNARDO, CA;ALIG, RL
在甲烷大气中，铁颗粒不会大量长出细丝，不足以使连续反应堆成为现实。向铁中加入少量的硫会大大增加细丝的形成。我们证明这是因为硫液化了铁颗粒，增强了丝的成核。随着硫含量的不断增加，长丝的数量不断增加，但以长度和直线度衡量的质量却在下降。我们将此归因于催化剂颗粒中较高的硫浓度使熔点高于共晶，从而降低了长丝延长的效率。
Iron particles do not grow filaments in a methane atmosphere profusely enough to make a continuous reactor practical. Adding small quantities of sulfur to the iron vastly increases filament formation. We show that this is because the sulfur liquefies the iron particle, enhancing filament nucleation. With continued increases in sulfur, the number of filaments produced continues to increase, but quality, measured by length and straightness, decreases. We attribute this to higher sulfur concentration in the catalyst particle moving the melting point above the eutectic, thus decreasing the efficiency of filament lengthening.