| 煤和聚丙烯腈炭化过程中负载铁原子在表面与体相间的质量迁移 |
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| 引用本文： | 朱珍平,顾永达.煤和聚丙烯腈炭化过程中负载铁原子在表面与体相间的质量迁移[J].环境化学,1997,16(4):295-299. |
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| 作者姓名： | 朱珍平 顾永达 |
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| 作者单位： | 煤转化国家重点实验室 中国科学院山西煤炭化学研究所太原030001 |
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| 基金项目： | 国家自然科学基金，山西煤化所所长基金的资助 |
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| 摘 要： | 采用ＸＰＳ和Ａｒ＾＋离子刻蚀技术，研究了炭化过程中铁原子在煤和聚丙烯腈表面和体相间的质量分布规律。结果发现，随炭化进行铁原子由表面向体相迁移和富集，炭化温度升高，迁移和富集增加，表面浓度逐渐降低，以致铁原子沿粒子径向呈浓度梯度分布。
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| 关 键 词： | 铁原子 聚丙烯腈 表面 体相间 质量转移 煤 炭化 |
THE MASS MIGRATION OF IRON ATOM DURING CARBONIZATION OF POLYACRYLONITRILE AND COAL |
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| Zhu Zhenping,Gu Yongda,Liu Zhenyu.THE MASS MIGRATION OF IRON ATOM DURING CARBONIZATION OF POLYACRYLONITRILE AND COAL[J].Environmental Chemistry,1997,16(4):295-299. |
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| Authors: | Zhu Zhenping Gu Yongda Liu Zhenyu |
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| Abstract: | The mass distrbution of iron atom between the surface and bulk of polyacrylonitrile and coal during their carbonization was studied by using XPS and Ar- ion etching techniques. It is found that iron atoms migrate and enrich from the surface to bulk during the carbonization of polyacrylonitrile and coal. and that the higher the carbonization temperature, the more the migration and enrichment. This results in a concentration ladder distribution of iron atoms along the direction of the particle diameter. There is a lower concentration of iron atom on the surface. |
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| Keywords: | coal char polyacrylonitrile iron catalyst XPS Ar+ ion etching |
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