Inhibition mechanism between sodium (Na3AlF6) and sulfur on coke reactivity
Inhibition mechanism between sodium (Na3AlF6) and sulfur on coke reactivity
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DOI：
10.1007/s11771-017-3581-y
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发表时间：
2017-08
影响因子：
4.4
通讯作者：
Qifan Zhong;Jin Xiao;Fa-chuang Li;Jie Li
中科院分区：
文献类型：
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作者：
Qifan Zhong;Jin Xiao;Fa-chuang Li;Jie Li
采用低杂质沥青焦模拟石油焦，并通过杂质掺杂的方法，研究了Na 3AlF 6和S对焦炭反应性的抑制机理。通过扫描电子显微镜、能谱仪和X射线粉末衍射分析，探讨了其作用机理。结果表明，Na对碳-空气/CO2反应中S的催化作用有明显的抑制作用，而S对碳-空气反应中Na的催化作用有一定的抑制作用。Na/S原子比为1.4的稳定结构和“Na_2SO_3 → Na_2S → Na_2CO_3 → Na_2SO_3”的循环反应体系可能是产生这种相互抑制作用的关键。
Inhibition mechanism between sodium (Na3AlF6) and sulfur on coke reactivity was investigated by simulating petroleum coke with low-impurity pitch coke and by impurity doping. The mechanism was discussed by scanning electron microscopy, energy-dispersive spectrometry, and X-ray powder diffraction. Results show that Na effectively inhibited S catalysis during carbon–air/CO2reactions, and S inhibited the catalysis of Na during carbon–air reaction to a certain extent. A stable structure with a Na-to-S atomic ratio of 1.4 and a cyclic reaction system of “Na2SO3→ Na2S→ Na2CO3→ Na2SO3” were likely the keys to producing this mutual inhibition.