| 煤中钠存在形式的研究 |
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| 引用本文： | 汉春利 张军. 煤中钠存在形式的研究[J]. 燃料化学学报, 1999, 27(6): 575-578 |
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| 作者姓名： | 汉春利 张军 |
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| 作者单位： | 东南大学热能工程研究所!南京210096 |
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| 基金项目： | 国家自然科学基金!资助项目 (项目批准号 :5 960 60 0 8)，国家重点基础研究项目资助! (G19990 2 2 2 0 6) |
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| 摘 要： | 煤中钠的存在形式由于与煤的灰污性质密切相关,很早即为人们所关注[1,2]。对煤中钠存在形式的研究始于50年代[1,2],已认识到煤中的钠既以无机形式存在,也以有机形式存在。对钠的分析普遍采用萃取方法,但不同学者所采用的萃取液并不相同,其中大多以稀盐酸为萃取液[3,4]。稀...
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| 关 键 词： | 煤 钠 氯 存在形式 |
MODES OF OCCURRENCE OF SODIUM IN COALS |
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| Han Chunli Zhang Jun Liu Kunlei Xu Yiqian. MODES OF OCCURRENCE OF SODIUM IN COALS[J]. Journal of Fuel Chemistry and Technology, 1999, 27(6): 575-578 |
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| Authors: | Han Chunli Zhang Jun Liu Kunlei Xu Yiqian |
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| Affiliation: | Thermoenergy Engineering Research Institute Southeast University Nanjing |
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| Abstract: | The occurrence of sodium in coals is relevant closely to boiler tube fouling problem and erosion of gas turbine in PFBC Here the modes of occurrence of sodium in coals were investigated by using sequential extraction procedures with distilled water, 1mol/L ammonium acetate and 1mol/L hydrochloric acid in turn The sequential extraction tests were carried out with 10 samples of coal in different ranks and particle sizes Petrographic and proximate analyses were also proceeded at the same time The results showed that the amount of total and insoluble sodium increased with the rank More ammonium acetate-soluble sodium was found in rich initinite coals, and more water-soluble sodium in rich vitrinite coals The amount of total and water-soluble sodium generally decreased as the particle size increased The mole ratio of water-soluble sodium to chloride in coals differed from NaCl crystal which suggested that water-soluble sodium and chloring occurred independently in coals instead of NaCl molecules |
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| Keywords: | coal sodium chlorine modes of occurrence |
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