| 外加NaCl 和NaAc褐煤在气化过程中钠的形态变迁规律研究 |
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| 引用本文： | 卫小芳,黄戒介,房倚天,王洋.外加NaCl 和NaAc褐煤在气化过程中钠的形态变迁规律研究[J].燃料化学学报,2009,37(1):6-10. |
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| 作者姓名： | 卫小芳 黄戒介 房倚天 王洋 |
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| 作者单位： | 1.Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China,;
2.Graduate University of Chinese Academy of Sciences, Beijing 100049, China |
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| 基金项目： | 国家重点基础研究发展规划(973计划)，国家高技术研究发展计划(863计划) |
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| 摘 要： | 以水蒸气作为气化剂，在固定床上考察了脱碱金属煤外加NaCl 和NaAc 900 ℃快速热解煤焦在900 ℃和950 ℃下常压气化过程中钠的形态变迁以及挥发析出规律。研究结果表明，外加NaCl的浓度较低时气化后一部分水溶态和酸不溶态的Na向水不溶但酸溶态Na变迁，当外加NaCl的浓度较高时，所有的Na在气化中挥发。外加NaAc的煤焦中的Na在气化过程中大部分挥发到气相，且气化温度和添加的浓度对Na的挥发行为变化影响均较小。
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| 关 键 词： | 褐煤 气化 NaCl NaAc 钠形态变迁 |
| 收稿时间： | 2008-07-13 |
| 修稿时间： | 2008-11-06 |
Transformation of sodium during gasification of a lignite with addition of NaCl and NaAc |
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| WEI Xiao-fang,HUANG Jie-jie,FANG Yi-tian,WANG Yang.Transformation of sodium during gasification of a lignite with addition of NaCl and NaAc[J].Journal of Fuel Chemistry and Technology,2009,37(1):6-10. |
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| Authors: | WEI Xiao-fang HUANG Jie-jie FANG Yi-tian WANG Yang |
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| Institution: | 1.Institute of Coal Chemistry;Chinese Academy of Sciences;Taiyuan 030001;China;2.Graduate University of Chinese Academy of Sciences;Beijing 100049;China |
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| Abstract: | The transformation and releasing characteristics of sodium during steam gasification of the chars from rapid pyrolysis of lignite with addition of different concentrations of NaCl and NaAc have been studied in a fixed bed at 900 ℃ and 950 ℃ under atmospheric pressure. The results show that part of water soluble sodium and acid insoluble sodium are transformed into water insoluble but acid soluble during gasification when the concentration of sodium in char is lower. And almost all the sodium is released to gas phase when the addition of sodium is higher. The transformation characteristics of additive NaAc is different from NaCl. Nearly, all the sodium is released to gas phase during gasification. The gasification temperature and the sodium concentration show little influence on the volatility behavior. |
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| Keywords: | NaCl NaAc |
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