Stirred autoclave apparatus for study of the Fischer-Tropsch synthesis in a slurry bed. 2. Analytical procedures.

Huff, George A.; Satterfield, Charles N.; Wolf, Martin

doi:10.1021/i100010a018

Cited by 25 publications

(14 citation statements)

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“…A calibration table in Chemstation containing the major compounds in the FT product, including most of the peaks eluting before hexane and the "fingerprint" compounds eluting after hexane, was successful in identifying peaks in the FT capillary column chromatograms. Huff et al (1983) also limited identification of their organic FT product (collected and injected off-line) to the major hydrocarbons and oxygenates. The peaks in the calibration table were identified by superposition with standard chromatograms.…”

Section: Resultsmentioning

confidence: 99%

On-Line Gas Chromatographic Analysis of Fischer−Tropsch Synthesis Products Formed in a Supercritical Reaction Medium

Snavely

Subramaniam

1997

Ind. Eng. Chem. Res.

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C 1 -C 30 products from Fischer-Tropsch synthesis, conducted in a supercritical n-hexane medium over an Fe catalyst in a fixed-bed reactor, are analyzed using on-line gas chromatography. A Hewlett-Packard 5890 Series II gas chromatograph (GC) is modified to minimize the effects of condensation of the on-line sample in the transfer lines. The GC is configured with a Supelco Petrocol DH capillary column connected to a flame ionization detector (FID) and two 1.83 m × 3.18 mm stainless steel columns placed in series, packed with 80/100 mesh HayeSep D, connected to a thermal conductivity detector (TCD). It is shown that pressure and temperature affect the elution order of oxygenates relative to hydrocarbons in the nonpolar capillary column. This phenomenon is exploited for obtaining improved resolution; several distinct methods produce similar elution orders. Ar, added to the syngas feed, is used to calculate syngas conversion. All compounds eluting before hexane (C 1 -C 5 , other than 2-methylpropene/1-butene and propanal/ propanone) and nearly all the major peaks eluting after hexane are resolved in the capillary column. H 2 , Ar, CO, CH 4 , CO 2 , and H 2 O are resolved in the packed columns. The method provides excellent quantitative measurement of component mole fractions that are within the range of calibration.

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Section: Resultsmentioning

confidence: 99%

On-Line Gas Chromatographic Analysis of Fischer−Tropsch Synthesis Products Formed in a Supercritical Reaction Medium

Snavely

Subramaniam

1997

Ind. Eng. Chem. Res.

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“…Our reactor system has been described previously (Huff and Satterfield, 1982;Huff et al, 1983), and the behavior of the same catalyst under a variety of conditions has also been described (Satterfield and Huff, 1982;Huff and Satterfield, 1984a,b). Since most of the water formed by the synthesis reaction may disappear by the water gas shift, the addition of water to the synthesis gas in various concentrations made it possible to enhance the effects that it might cause.…”

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confidence: 99%

Effect of water on the iron-catalyzed Fischer-Tropsch synthesis

Satterfield¹,

Hanlon²,

Tung³

et al. 1986

Ind. Eng. Chem. Prod. Res. Dev.

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The addition of water vapor to dry synthesis gas to comprise as much as 27 mol % of the feed composition decreased catalyst activity, but the effect was completely reversible upon removal of the water vapor. Reversibility was not complete with water addition to comprise 42 mol % of feed. Water vapor decreased methane selectivity, increased oxygenate selectivity, and increased the rate of the water gas shift. However, these effects did not correlate with the relative Fe5C2, Fe304, and Fe content of the bulk catalyst as determined by Móssbauer spectroscopy, although the Fe5C2 content did not change greatly. Molecular weight distribution of the C3-C7 products was not affected by water.

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“…Gaseous, aqueous, and liquid products were analyzed with three gas chromatographs as described by Huff et al (1983). Tie components, CO 2, CH 4, and C__and C3 compounds, were used to match the analyses from three gas chromatograms and provide complete product distributions for e+_(_h material balance.…”

Section: Methodsmentioning

confidence: 99%

Slurry phase Fischer-Tropsch synthesis: Cobalt plus a water-gas shift catalyst. [Quarterly] report, July 1, 1990--September 30, 1990

Chanenchuk¹,

Yates²,

Satterfield³

1990

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A Co/MgO/SiO 2 Fischer-Tropsch catalyst was operated simultaneously with a Cu/ZnO/A120 3water-gas-shift catalyst in a slurry reactor for over 400 hours. The process conditions were held constant at a temperature of 240°C, a pressure of 0.79 MPa, and a 1.1 HJCO feed of 0.065 N1/min-g.cat. The Fischer-Tropsch activity remained constant at the level predicted by the operation of the Co/MgO/SiO 2 catalyst alone. The water-gas-shift reaction was near equilibrium. The hydrocarbon product distribution of the combined catalyst system was stable and matched that of the Co/MgO/SiO 2 operating alone under similar conditions. The combined catalyst system exhibited a high selectivity to n-alkanes. Neither catalysts's operation appeared to have a detrimental effect on that of the other, showing promise for future optimization.

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Stirred autoclave apparatus for study of the Fischer-Tropsch synthesis in a slurry bed. 2. Analytical procedures.

Abstract: A procedure is presented that provides a detailed quantitative analysis of Fischer-Tropsch products from an iron or a cobalt catalyst including oxygenates and hydrocarbons. Notably hydrogen and water are also determined, so that complete material balances can be obtained on all elements.

Cited by 25 publications

References 1 publication

On-Line Gas Chromatographic Analysis of Fischer−Tropsch Synthesis Products Formed in a Supercritical Reaction Medium

On-Line Gas Chromatographic Analysis of Fischer−Tropsch Synthesis Products Formed in a Supercritical Reaction Medium

Effect of water on the iron-catalyzed Fischer-Tropsch synthesis

Slurry phase Fischer-Tropsch synthesis: Cobalt plus a water-gas shift catalyst. [Quarterly] report, July 1, 1990--September 30, 1990

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