甲烷部分氧化制合成气中副产纳米碳管的研究

研究了甲烷部分氧化制合成气过程中生成的碳,对其做了TEM、XRD和Raman光谱测试,分析得知产物中含有大量多壁纳米碳管。为了研究其生成的原因,去掉催化剂,在相同的装置和反应条件下,甲烷和氧气或以合成气为原料进行反应,结果发现,以甲烷和氧气为原料气时无碳生成,而用合成气为原料,进行反应时,反应后可得到大量碳。对产物碳做了TEM、XRD和Raman光谱测试,结果表明为多壁纳米碳管,由此推测,甲烷部分氧化过程中生成的纳米碳管是由一氧化碳歧化生成,反应装置中的控温热电偶可能起催化剂的作用。氢气在一氧化碳歧化制备纳米碳管的过程中起着很重要的作用。

Study on Carbon Nanotubes Produced in Partial Oxidation of Methane to Synthesis Gas

Carbon produced during the reaction of partial oxidation of methane (POM) to synthesis gas was studied. A series of characterizations such as TEM, XRD and Raman spectroscopy were made. It was found that a lot of multi-walled carbon nanotubes existed in the carbon products. Without catalyst, a lot of carbon was produced when synthesis gas was used as feed gas, but no carbon formed when methane and oxygen were used as feed gas. The produced carbon was proved to be multi-nanotubes by characterization. So, it was proposed that the product carbon nanotubes during POM process was attributed to the disproportionation of carbon monoxide, and the thermocupple worked as catalyst for carbon nanotube formation. Hydrogen played an important role in the process of forming carbon nanotube.