质子化
芳香性
表征(材料科学)
煤
化学
碳纤维
碳-13核磁共振
谱线
光谱学
分析化学(期刊)
物理化学
分子
有机化学
材料科学
纳米技术
物理
离子
复合材料
复合数
量子力学
天文
作者
D. Franco,Jan M. Gelan,Henri Martens,Dirk Vanderzande
出处
期刊:Fuel
[Elsevier]
日期:1991-07-01
卷期号:70 (7): 811-817
被引量:15
标识
DOI:10.1016/0016-2361(91)90187-f
摘要
13C CP/MAS spectra have been used for the characterization of two different coal types and their derived products, obtained after mild and severe treatment. The carbon aromaticity (faC) was determined by fitting signal areas in CP/MAS spectra to an expression that describes the evolution of carbon magnetization with the experimental contact time. Proper modification of the CP/MAS pulse sequence allows separation of protonated and non-protonated carbons. This technique is used to determine the carbon aromaticity of the non-protonated carbons. This parameter is related, together with the faC, to the coal structure. Our results are compared with literature data for both coal types.
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