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題名 | Effects of Operating Conditions on the Fullerene Synthesis and Its Purification=操作條件對C[fefe]合成與純化之影響 |
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作者 | 林勝雄; 張有文; Lin, Sheng H.; Chang, Yu W.; |
期刊 | 中國工程學刊 |
出版日期 | 19990700 |
卷期 | 22:4 1999.07[民88.07] |
頁次 | 頁401-408 |
分類號 | 460.02 |
語文 | eng |
關鍵詞 | 福勒倫合成; 純化; 電弧法; 最佳產量; Fullerene synthesis; Purification; Electric arc; Optimum yield; |
中文摘要 | 本研究是利用電弧法來探討在各種不同操作條件下,C ��的合成。此法利用一套 額精密的實驗設備。 為了 C ��的分離與純化。本研究也設計一套改良式的索氏萃取裝置, 該裝置利用氧化鋁或氧化鋁和活性碳混床。電弧法由超純石墨棒所產生的碳灰是利用氬氣將 之帶離電弧區,此碳灰所產生“福勒倫”含有超過 90% 的 C ��和 C �╮C索氏萃取裝置填 充氧化鋁和活性碳,分離與純化 C ��和 C �◥漁蘆G相當好。 |
英文摘要 | Electric arc method was employed in this work to investigate the fullerene synthesis under various operating conditions. An elaborate apparatus was designed for the experimental studies. For fullerene separation and purification, a modified Soxhiet extraction column packed with alumina or alumina/granular activated carbon (GAC) was utilized. The fullerene-containing soot was generated from ultrapure graphite rods in a quartz reactor in the absence of oxygen and under partial vacuum conditions. Helium, argon and nitrogen were employed as the purging gases in the electric arc system. Among these three working inert gases, helium was found to be the best in terms of fullerene yield. The helium flow rate was observed to have lesser effect on the fullerene yield than the operating pressure maintained in the reactor. The fullerene production by the present electric arc apparatus was found to consist of over 90% C�� and C�� with the remainder being other minor fullerene components. The Soxhiet extraction column packed with alumina/GAC offered efficient separation of C�� from C�糎nd other minor fullerene components. It was also observed in the experiments that fullerene yield, and thus the C�� production, is considerably enhanced as the current input is increased. |
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