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›› 2002, Vol. 2 ›› Issue (2): 0-0.

• 2 •    

煤炭在超临界水中氧化的初步实验

朱小峰，王涛   

  1. 清华大学化工系，北京100084
  • 出版日期:2002-04-20 发布日期:2002-04-20

Effects of Seed Crystals on Preparation of a-Al2O3 Ultrafines by Wet-chemical Methods

XU Ke-jing   

  1. Department of Chemical Engineering, Tsinghua University, Beijing 100084, China
  • Online:2002-04-20 Published:2002-04-20

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摘要： 研究了煤炭在超临界水中氧化的基本规律，实验表明在以超临界水为介质的情况下，煤炭氧化过程产生的溶液冷却减压后产生的气相中无有害气体; 其中所含的硫、氮逐步转化为SO42–和N2; 煤炭氧化的程度随温度、H2O2水溶液的浓度增加而加快，反应温度的影响尤其显著.

关键词: 煤炭, 超临界水, 氧化

Abstract: The oxidation of coal in supercritical water was investigated by using O2 decomposed in situ from H2O2 as the oxidant. The results indicated that the sulfur and nitrogen contained in coal were gradually converted into SO42– and N2 respectively by oxidation in the supercritical water medium. The coal oxidation became faster with higher reaction temperature and higher concentration of H2O2.

Key words: crystal seeds, wet-chemical method, a-Al2O3 ultrafines, crystal phase transition

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