کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4706892 1353034 2006 13 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Early coalification features as approached by solid state 13C CP/MAS NMR spectroscopy
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات ژئوشیمی و پترولوژی
پیش نمایش صفحه اول مقاله
Early coalification features as approached by solid state 13C CP/MAS NMR spectroscopy
چکیده انگلیسی
Solid state 13C CP/MAS NMR spectroscopy and ultimate analysis have been applied to a study of samples from the Pleistocene Drama lignite and its successive modern analogue, the Philippi peat, in northeastern Greece. The succession from peat to lignite resulted in a C enrichment averaging 10.7% and depletion in H and O averaging 6.5 and 18.5%, respectively. Early coalification resulted in the degradation of methoxyl groups, carbohydrates and carboxylic groups, whereas the aliphatic carbons were less affected. However, organic geochemical alteration seems to depend strongly on the initial peatification conditions. The “aromaticity” decreases from the stage of peat to lignite, as a result of the significant degradation of lignin precursors.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Geochimica et Cosmochimica Acta - Volume 70, Issue 4, 15 February 2006, Pages 947-959
نویسندگان
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