| 预氧化对石油焦物理活化的作用 |
| Effect of Pretreatment Process on Physical Activation Performance of Petroleum Coke |
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| 摘要: |
| 关键词: 石油焦 物理活化 预氧化 活性炭 |
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| Abstract: Activated carbon was prepared from pretreated petroleum coke by the vapor activation. The effect of pretreatment process on activation performance of coke was studied by low temperature N2 adsorbtion-desorption and XRD. The results show that when the temperature is increased, coke loses volatiles with obvious volume contraction, resulting in decline in coke activation performance, the activated carbon obtained from carbonization coke after treatment at 650 ℃ is with a higher degree of graphitization, while pores below 1.5nm are disappeared. The oxidation pretreatment would modify the micro-structure of the coke and make the graphitization degree of coke decline. The activation performance of coke is improved greatly by air-oxidation pretreatment due to the formation of a mass of pore in coke with specific surface area about 146 m2·g-1, and the surface area of activated carbon is considerably increased. The specific surface area of the activated carbon from air-oxidated coke reached 499m2·g-1. Nitric acid pretreatment also had effect on improving activating performance of the petroleum coke. |
| Keywords: petroleum coke physical activation oxidation pretreatment activated carbon |
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| 张文峰,曹高萍,丁玉珍,杨裕生.预氧化对石油焦物理活化的作用[J].无机化学学报,2007,23(4):698-702. |
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