Pyrolysis-gas chromatography of the oil shale in Lucaogou Formation,Dahuangshan,Southern Junggar Basin
2008; Elsevier BV; Linguagem: Inglês
ISSN
2096-4803
Autores Tópico(s)Coal Properties and Utilization
ResumoDahuangshan oil shale mine is located at the main position of oil shale deposit belt in Northern Bogda Mountain.The majority of the pyrolysis products of Dahuangshan oil shale are n-alkanes and n-alkenes,which approximately account for 90% of total products.Aliphatic groups break from kerogen nuclear when heated and turn into alkyl radicals.Alkyl radicals,which are very active,quickly turn into n-alkanes or n-alkenes depending on capturing or losing hydrogen radicals.Due to the effect of space steric hindrance,the formation of n-alkenes need more energy than n-alkanes,and the formation ratio of short chain n-alkenes(C14-) is bigger than long chain n-alkenes(C15+).The relative contents of C1—C4 n-alkanes and n-alkenes,C5—C14 n-alkanes and n-alkenes,and C15+ n-alkanes and n-alkenes are effective parameters to distinguish kerogen type,as proved.Also the composition ratio of all n-alkanes and all n-alkenes is also an accurate parameter,for the type Ⅰ kerogen is below 2.17 while the type Ⅱ is above it.The pyrolysis products of Dahuangshan oil shale are mainly high wax paraffinic oil,which is similar to that of Green River shale in America.
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