Comprehensive two-dimensional gas chromatography for the analysis of Fischer-Tropsch oil products

van der Westhuizen R. ; Crous R. ; de Villiers A. ; Sandra P. (2010)


The Fischer-Tropsch (FT) process involves a series of catalysed reactions of carbon monoxide and hydrogen, originating from coal, natural gas or biomass, leading to a variety of synthetic chemicals and fuels. The benefits of comprehensive two-dimensional gas chromatography (GC × GC) compared to one-dimensional GC (1D-GC) for the detailed investigation of the oil products of low and high temperature FT processes are presented. GC × GC provides more accurate quantitative data to construct Anderson-Schultz-Flory (ASF) selectivity models that correlate the FT product distribution with reaction variables. On the other hand, the high peak capacity and sensitivity of GC × GC allow the detailed study of components present at trace level. Analyses of the aromatic and oxygenated fractions of a high temperature FT (HT-FT) process are presented. GC × GC data have been used to optimise or tune the HT-FT process by using a lab-scale micro-FT-reactor. © 2010 Elsevier B.V.

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