Abstract

In the coking of heavy tar at 450–550°C, the influence of added carbon nanotubes on the yield of petroleum coke is studied. The properties of the resulting coke–nanotube composite are determined. Electron-microscopic data show that, in coking a mixture of heavy tar and nanotubes, the petroleum coke is reinforced by carbon nanotubes. Adding carbon nanotubes to heavy tar decreases its sulfur content. The drop in sulfur content of the petroleum coke is associated with the transfer of sulfur to hydrogen sulfide and COS, which are removed with the gas phase. With increase in the content of carbon nanotubes in petroleum coke, the electrical resistance of the coke–nanotube composite declines. Adding 5% of carbon nanotubes to the heavy tar lowers the resistance of the coke produced by a factor of 20.

中文翻译：

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碳纳米管对重焦油焦炭性能的影响

摘要

在450~550℃重焦油焦化过程中，研究了添加碳纳米管对石油焦收率的影响。测定所得焦炭-纳米管复合材料的性质。电子显微镜数据显示，在焦化重焦油和纳米管的混合物时，石油焦被碳纳米管增强。在重焦油中添加碳纳米管会降低其硫含量。石油焦中硫含量的下降与硫向硫化氢和 COS 的转移有关，这些硫化氢和 COS 会随气相除去。随着石油焦中碳纳米管含量的增加，焦炭-纳米管复合材料的电阻下降。在重焦油中添加 5% 的碳纳米管可使产生的焦炭的电阻降低 20 倍。