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中南大学学报(英文版)

Journal of Central South University

Vol. 24    No. 8    August 2017

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Inhibition mechanism between sodium (Na3AlF6) and sulfur on coke reactivity
ZHONG Qi-fan(仲奇凡)1, XIAO Jin(肖劲)1, 2, LI Fa-chuang(李发闯)1, LI Jie(李劼)1, 2

1. School of Metallurgy and Environment, Central South University, Changsha 410083, China;
2. National Engineering Laboratory of Efficient Utilization of Refractory Nonferrous Metal Resources(Central South University), Changsha 410083, China

Abstract: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/CO2 reactions, 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.

 

Key words: mutual inhibition; sulfur; sodium; coke reactivity

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
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