Capillary Gas Chromatographic Characterization of Fischer-Tropsch Liquefaction Product Oils

Product Analysis of Supercritical Fischer-Tropsch Synthesis: Utilizing a Unique On-Line and Off-Line Gas Chromatographs Setup in a Bench-Scale Reactor Unit

“…For lighter alcohols (C 3 -C 7 ), the alcohol peak was located before the C X isomers, for (C 8 -C 13 ) alcohols, the alcohol peaks were located between C X isomers and for (C 14 -C 20 ) alcohols, the alcohol peaks were found after the isomers and before the α-olefins peaks. It is also noticeable that, α-olefins were not detectable by the Agilent GC/MS beyond (C 17 ), alcohols beyond 1-eicosanol (C 20 normal alcohol) were not detectable, while cis and trans alkenes were not detectable beyond (C 22 ). All observations mentioned earlier agree well with the profile of FTS hydrocarbon product distribution obtained from cobalt-based catalysts tested under similar conditions [21] [24].…”

“…Since these compounds were not prevalent in the FTS product and the error resulting by ignoring them would be minimal, they were not included in the FTS product distribution. For instance, the combined total weight percent of aromatics, acids and esters in the organic FTS phase was estimated by Hackett et al [26] to be less than 4 wt%. While, acids and esters constituted about 8 wt% of the aqueous FTS samples as estimated by Anderson and White [27].…”

“…Snavely and Subramaniam [21] also used a single GC similar to that of Dictor and Bell. However, they incorporated a number of modifications from the work of Hackett and Gibbon [22] and Nijs and Jacobs [23] such as the use of a hot trap for the removal of heavy hydrocarbons (wax) before the on-line GC and injecting argon as internal standard for conversion calculations. Furthermore, they have utilized improved capillary and packed columns resulting in better product resolution.…”

Liquid phase Fischer-Tropsch (II) demonstration in the LaPorte Alternative Fuels Development Unit. Volume 1/2, Main Report. Final report

“…The hydrocarbon analysis used DOE-PETC's methods (5). Both the GCs were dedicated to product gas analysis, measuring concentrations of Ci-Cg hydrocarbons.…”

Fischer-Tropsch synthesis in supercritical reaction media. [Quarterly] progress report, July 1, 1993--September 30, 1993

“…We have also performed preliminary calculations to determine the relevant parameters that need to be measured in the gas sample circuit, in case external standardization is required for calibration. Hackett and Gibbon (1989) measured the pressure between the two sample loops during a calibration run and during a sample run to adjust the response factors for the various compounds. Preliminary derivations suggest that the amount of sample in a fixed volume loop is not a simple function of pressure.…”