Combined quantitative FTIR and online GC study of Fischer-Tropsch catalysts

Andrew I. McNab, Alan J. McCue, Davide Dionisi, James A. Anderson*

*Corresponding author for this work

Research output: Contribution to journalArticle

2 Citations (Scopus)
6 Downloads (Pure)

Abstract

A method for the quantification of the chain length of surface hydrocarbon species on Fischer-Tropsch catalysts by in-situ FTIR was combined with online gas chromatography in order to investigate any potential relationship between adsorbed hydrocarbons species and those detected as reaction products. By varying the reaction conditions and the active metal, changes to the chain lengths of surface species and the product distribution were monitored. Results show that the species observed spectroscopically are predominantly adsorbed reaction products which do not directly relate to the detected reaction products. Hydrocarbon species which can be transported to the support material (γ-alumina) may be ascribed to oxygenated products which are not produced in detectable amounts by GC at low conversion but are selectively adsorbed from the gas phase.

Original languageEnglish
Pages (from-to)295-304
Number of pages10
JournalJournal of Catalysis
Volume353
Early online date17 Aug 2017
DOIs
Publication statusPublished - Sep 2017

Fingerprint

Hydrocarbons
Reaction products
reaction products
hydrocarbons
Chain length
catalysts
Catalysts
Aluminum Oxide
products
gas chromatography
Gas chromatography
Alumina
aluminum oxides
Gases
Metals
vapor phases
metals

Keywords

  • Adsorbed alkyl species
  • Cobalt catalyst
  • Fischer Tropsch
  • FTIR
  • Quantitative FTIR

ASJC Scopus subject areas

  • Catalysis
  • Physical and Theoretical Chemistry

Cite this

Combined quantitative FTIR and online GC study of Fischer-Tropsch catalysts. / McNab, Andrew I.; McCue, Alan J.; Dionisi, Davide; Anderson, James A.

In: Journal of Catalysis, Vol. 353, 09.2017, p. 295-304.

Research output: Contribution to journalArticle

@article{2b79b5e9c6434528bf193c38560dfc92,
title = "Combined quantitative FTIR and online GC study of Fischer-Tropsch catalysts",
abstract = "A method for the quantification of the chain length of surface hydrocarbon species on Fischer-Tropsch catalysts by in-situ FTIR was combined with online gas chromatography in order to investigate any potential relationship between adsorbed hydrocarbons species and those detected as reaction products. By varying the reaction conditions and the active metal, changes to the chain lengths of surface species and the product distribution were monitored. Results show that the species observed spectroscopically are predominantly adsorbed reaction products which do not directly relate to the detected reaction products. Hydrocarbon species which can be transported to the support material (γ-alumina) may be ascribed to oxygenated products which are not produced in detectable amounts by GC at low conversion but are selectively adsorbed from the gas phase.",
keywords = "Adsorbed alkyl species, Cobalt catalyst, Fischer Tropsch, FTIR, Quantitative FTIR",
author = "McNab, {Andrew I.} and McCue, {Alan J.} and Davide Dionisi and Anderson, {James A.}",
note = "Acknowledgements We thank the College of physical sciences, university of Aberdeen for a studentship (to A. McNab). Supplementary data associated with this article can be found, in the online version, at http://dx.doi.org/10.1016/j.jcat.2017.07.028.",
year = "2017",
month = "9",
doi = "10.1016/j.jcat.2017.07.028",
language = "English",
volume = "353",
pages = "295--304",
journal = "Journal of Catalysis",
issn = "0021-9517",
publisher = "ACADEMIC PRESS INC ELSEVIER SCIENCE",

}

TY - JOUR

T1 - Combined quantitative FTIR and online GC study of Fischer-Tropsch catalysts

AU - McNab, Andrew I.

AU - McCue, Alan J.

AU - Dionisi, Davide

AU - Anderson, James A.

N1 - Acknowledgements We thank the College of physical sciences, university of Aberdeen for a studentship (to A. McNab). Supplementary data associated with this article can be found, in the online version, at http://dx.doi.org/10.1016/j.jcat.2017.07.028.

PY - 2017/9

Y1 - 2017/9

N2 - A method for the quantification of the chain length of surface hydrocarbon species on Fischer-Tropsch catalysts by in-situ FTIR was combined with online gas chromatography in order to investigate any potential relationship between adsorbed hydrocarbons species and those detected as reaction products. By varying the reaction conditions and the active metal, changes to the chain lengths of surface species and the product distribution were monitored. Results show that the species observed spectroscopically are predominantly adsorbed reaction products which do not directly relate to the detected reaction products. Hydrocarbon species which can be transported to the support material (γ-alumina) may be ascribed to oxygenated products which are not produced in detectable amounts by GC at low conversion but are selectively adsorbed from the gas phase.

AB - A method for the quantification of the chain length of surface hydrocarbon species on Fischer-Tropsch catalysts by in-situ FTIR was combined with online gas chromatography in order to investigate any potential relationship between adsorbed hydrocarbons species and those detected as reaction products. By varying the reaction conditions and the active metal, changes to the chain lengths of surface species and the product distribution were monitored. Results show that the species observed spectroscopically are predominantly adsorbed reaction products which do not directly relate to the detected reaction products. Hydrocarbon species which can be transported to the support material (γ-alumina) may be ascribed to oxygenated products which are not produced in detectable amounts by GC at low conversion but are selectively adsorbed from the gas phase.

KW - Adsorbed alkyl species

KW - Cobalt catalyst

KW - Fischer Tropsch

KW - FTIR

KW - Quantitative FTIR

UR - http://www.scopus.com/inward/record.url?scp=85028384230&partnerID=8YFLogxK

U2 - 10.1016/j.jcat.2017.07.028

DO - 10.1016/j.jcat.2017.07.028

M3 - Article

VL - 353

SP - 295

EP - 304

JO - Journal of Catalysis

JF - Journal of Catalysis

SN - 0021-9517

ER -