Deuterium Tracer Studies and Gas Chromatography–Mass Spectrometry Analysis of Deuterated Products during Fischer–Tropsch Synthesis

Shi, Bingbing; Liao, Yunxin; Wu, Lin; Davis, Burtron H.

doi:10.1007/s11244-013-0202-3

Cited by 6 publications

(7 citation statements)

References 49 publications

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“…Lastly, measurements for the natural abundance of 13 C were also included as this abundance could interfere with results. The results from the data, albeit already published, 19 indicate that this type of separation is not hindered by the instrumentation as displayed here.…”

Section: Per Compound Does the M-1 Interfere With The Calculations Fsupporting

confidence: 62%

“…Further work was completed probing the FT mechanism by competitive work where H 2 and D 2 were fed competitively for several hours, thus creating a kinetically relevant experiment. However, unlike before where the molecules were either fully deuterated or hydrogenated, these competitive experiments generated a range of partially deuterated compounds per carbon number . Since these isotopomers could not be separated chromatographically, limitations for this type of analysis now lie in the ability of the mass selective detector (MSD).…”

Section: Introductionmentioning

confidence: 99%

“…However, unlike before where the molecules were either fully deuterated or hydrogenated, these competitive experiments generated a range of partially deuterated compounds per carbon number. 19 Since these isotopomers could not be separated chromatographically, limitations for this type of analysis now lie in the ability of the mass selective detector (MSD). The main instrument utilized in this type of work is the GC-EI-MSD simply because of its simplicity, its cost, and its already extensive library compared to other mass spec instruments.…”

Section: Introductionmentioning

confidence: 99%

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Exchange interference for a range of partially deuterated hydrocarbons using a GC‐EI‐MSD

Shafer

Davis

2018

J Mass Spectrom

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Industrial catalyst processes, such as the Fischer-Tropsch process produce a vast array of products from syngas (H /CO) such as; jet fuel, gasoline, diesel, synthetic rubbers, monomers for plastics industries and other oil/wax materials for specific purposes such as cosmetics. Multitudes of publications, since the discovery of the FT process in 1925, have been composed attempting to elucidate the mechanism. Many of these publications attempt to investigation the mechanism of FT by the utilization of specific deuterium experimentation through the switching of the syngas from H /CO to D /CO. Results from this switching indicated that hydrogen was involved in the rate limited step, however; the overall process conversion produced an inverse kinetic isotope effect (IKIE). To confirm results were not hindered by the physical switch of the hydrogen isotopes, further experimentation was performed using equal molar of each isotope competitively (i.e. equal molar H /D )/CO. Complications arose from this competitive work as it generated fully exchanged products - all partially deuterated hydrocarbons that could not be separated by chromatography. Thus, these compounds could no longer be separated by the chromatography and now required a further separation by mass. The overall scope for this work was to determine if a range of partially deuterated paraffin compounds, generated by FT, can be analyzed using an EI-MSD without inter-instrumental H/D exchange. Results indicate that no real exchange occurs in the EI MSD for a carbon range from about C - C . Thus, even though the materials cannot be separated chromatographically they can be further separated and analyzed to determine the overall H/D content for these specific chain lengths.

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Section: Per Compound Does the M-1 Interfere With The Calculations Fsupporting

confidence: 62%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Exchange interference for a range of partially deuterated hydrocarbons using a GC‐EI‐MSD

Shafer

Davis

2018

J Mass Spectrom

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“…This procedure was usually repeated two times under one set of reaction conditions. Liquid samples were analyzed by GC and the identities of products were confirmed by GC/MS [15,18].…”

Section: Methodsmentioning

confidence: 99%

Formation of 2-alkenes as secondary products during Fischer–Tropsch synthesis

Shi

Liao

Naumovitz

2015

Applied Catalysis A: General

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“…Our interests in studying mechanisms of catalytic reactions using isotopic tracer technique [4] led us to determine whether there is an inverse isotope effect and whether there exists the deuterium enrichment in hydrocarbons during FTS. We performed the H 2 / D 2 switch and competition experiments in cobalt and iron catalyzed FTS.…”

Section: Inverse Isotope Effect and Deuterium Enrichment During Ftsmentioning

confidence: 99%

Alkylidene Mechanism for the Fischer-Tropsch Synthesis

Shi¹

2014

J Thermodyn Catal

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Deuterium Tracer Studies and Gas Chromatography–Mass Spectrometry Analysis of Deuterated Products during Fischer–Tropsch Synthesis

Cited by 6 publications

References 49 publications

Exchange interference for a range of partially deuterated hydrocarbons using a GC‐EI‐MSD

Exchange interference for a range of partially deuterated hydrocarbons using a GC‐EI‐MSD

Formation of 2-alkenes as secondary products during Fischer–Tropsch synthesis

Alkylidene Mechanism for the Fischer-Tropsch Synthesis

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