Effect of Different Drying Methods on Coal Structure and Reactivity Toward Liquefaction
Effect of Different Drying Methods on Coal Structure and Reactivity Toward Liquefaction
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DOI：
10.1021/ef950257w
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发表时间：
1996-05
期刊：
影响因子：
5.3
通讯作者：
F. Miknis;D. Netzel;T. F. Turner;A. Wallace;C. H. Butcher
中科院分区：
文献类型：
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作者：
F. Miknis;D. Netzel;T. F. Turner;A. Wallace;C. H. Butcher
研究了不同的干燥煤的方法，以确定是否可以在不改变煤的结构和液化反应性的情况下完成干燥。煤的干燥方法有高温干燥、微波干燥和低温化学干燥。对从褐煤到高挥发分烟煤的6种煤进行了研究。对预湿和干燥的煤进行了实验室规模的液化试验，以确定不同干燥方法对液化产率的影响。通过固体核磁共振(核磁共振)和溶胀测量来评估不同干燥方法对煤结构的影响。核磁共振测量表明，除部分脱羧基外，热干燥和微波干燥的煤总体上没有发生主要的结构变化。化学干燥的煤在脂肪碳区表现出更高的分辨率，这归因于吸附的甲醇，这是一种反应产物…
Different methods of drying coal were investigated to determine if drying can be accomplished without altering the coal structure and reactivity toward liquefaction. Coal-drying methods included thermal and microwave drying at elevated temperatures and chemical drying at low temperature. Six coals from lignite to high volatile bituminous rank were studied. Laboratory-scale liquefaction experiments were carried out on premoisturized and dried coals to determine the effects of different drying methods on liquefaction yields. Solid-state nuclear magnetic resonance (NMR) and swelling measurements were made to assess any changes in coal structure brought about by the different methods of drying. The NMR measurements showed that, in general, there were no major structural changes in coals dried thermally or with microwaves other than partial decarboxylation. Chemically dried coals exhibited increased resolution in the aliphatic carbon region that was attributed to adsorbed methanol, which was a reaction product...