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Determination of the structures and abundances of alkanes and olefins in Fischer-Tropsch products using 13C and 1H n.m.r. methods

โœ Scribed by David J. Cookson; Brian E. Smith

Publisher
Elsevier Science
Year
1989
Tongue
English
Weight
654 KB
Volume
68
Category
Article
ISSN
0016-2361

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โœฆ Synopsis

13C and 'H n.m.r. methods are shown to provide detailed and quantitative information regarding the structures and abundances of major and minor hydrocarbon components in products from Fischer-Tropsch synthesis. A test jet fuel product (boiling range 19&230"(Z) has been studied together with a test diesel fuel product (23&32O"C). The jet fuel consists primarily of n-alkanes (87 wt%), while branched alkanes with, on average, 12 carbon atoms per molecule and one CH, branch per molecule, represent another 9wt% of the sample. All possible monomethyl branched alkane isomers are shown to occur with approximately equal probability. Olefins represent nearly 4 wt% of the sample. 13C n.m.r. distinguishes l-ene (0.6 wt%), cis-2-ene (0.8 wt%), trans-2-ene (1.4 wt%), 2-methyl-2-ene (0.4 wt%) and trans-3-ene

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