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OALib Journal期刊
ISSN: 2333-9721
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axafs技术在ni/zno吸附剂上模型油反应吸附脱硫机理研究中的应用
, PP. 246-251
Keywords: axafs,xafs,ni/zno吸附剂,反应吸附脱硫,反应机理
Abstract:
？原子x射线吸收精细结构（axafs）由吸收原子的外围束缚电子对出射光电子波的背散射引起，axafs信号与嵌入原子势能、原子间隙势能和吸收原子电子密度的分布密切相关，可以作为精确的探针来探测原子的电子化学结构。研究利用axafs技术，以ni/zno脱硫吸附剂为研究对象，探讨了模型油在不同气体气氛下的脱硫反应机理。结果表明，在氢气气氛下、350℃和3.0mpa的条件下，从zn元素的原位axafs谱图中可观察到脱硫过程中zn元素的化学态变化。根据这些结果，揭示了氢气在脱硫过程中的重要作用，阐述了原位反应条件下吸附剂中zn元素的化学态变化。
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