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OALib Journal期刊
ISSN: 2333-9721
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澳大利亚烟煤热解的拉曼光谱研究
, PP. 270-276
Keywords: 拉曼光谱,热解,澳大利亚烟煤,气氛,保温时间
Abstract:
？采用拉曼光谱考察了澳大利亚烟煤在常压、温度为298~1473k条件下，不同热解气氛（ar和n2）下的热解性能。结合ad/aall、ag/aall、wg以及pg-pd等表征参数分析发现，澳大利亚烟煤的热解可以分为三个阶段：298~873k为固有小分子和大分子键能较弱处断裂分解产生的小分子化合物的析出沉积和挥发；873~1273k为大分子化合物裂解挥发和炭化；1273~1473k为焦炭的石墨化。在n2和ar气氛经1473k热处理后，焦炭的不同杂化结构的碳相对含量呈现明显差异。不同保温时间下，其煤焦碳结构演变趋势相似，但保温时间越长，越有利于小分子挥发分在较低温度的挥发。
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