Kinetic study based on the carbide mechanism of a Co-Pt/γ-Al2 O3 fischer–tropsch catalyst tested in a laboratory-scale tubular reactor

Marco Marchese (Corresponding Author), Niko Heikkinen, Emanuele Giglio, Andrea Lanzini, Juha Lehtonen, Matti Reinikainen

Research output: Contribution to journalArticleScientificpeer-review

1 Citation (Scopus)

Abstract

A Co-Pt/γ-Al2 O3 catalyst was manufactured and tested for Fischer–Tropsch applications. Catalyst kinetic experiments were performed using a tubular fixed-bed reactor system. The operative conditions were varied between 478 and 503 K, 15 and 30 bar, H2 /CO molar ratio 1.06 and 2.11 at a carbon monoxide conversion level of about 10%. Several kinetic models were derived, and a carbide mechanism model was chosen, taking into account an increasing value of termination energy for α-olefins with increasing carbon numbers. In order to assess catalyst suitability for the determination of reaction kinetics and comparability to similar Fischer–Tropsch Synthesis (FTS) applications, the catalyst was characterized with gas sorption analysis, temperature-programmed reduction (TPR), and X-ray diffraction (XRD) techniques. The kinetic model developed is capable of describing the intrinsic behavior of the catalyst correctly. It accounts for the main deviations from the typical Anderson-Schulz-Flory distribution for Fischer–Tropsch products, with calculated activation energies and adsorption enthalpies in line with values available from the literature. The model suitably predicts the formation rates of methane and ethylene, as well as of the other α-olefins. Furthermore, it properly estimates high molecular weight n-paraffin formation up to carbon number C80.

Original languageEnglish
Article number717
JournalCatalysts
Volume9
Issue number9
DOIs
Publication statusPublished - 26 Aug 2019
MoE publication typeA1 Journal article-refereed

Fingerprint

carbides
Carbides
reactors
catalysts
Catalysts
Kinetics
kinetics
Alkenes
Carbon Monoxide
alkenes
Olefins
Carbon
carbon
Methane
paraffins
Reaction kinetics
Carbon monoxide
Paraffin
Paraffins
sorption

Keywords

  • Carbide mechanism
  • Co-Pt/γ-Al O
  • Cobalt
  • Fischer
  • Kinetic model
  • Platinum
  • Tropsch synthesis

Cite this

@article{d3b0e785091649bd8cbb9ff66cf8497c,
title = "Kinetic study based on the carbide mechanism of a Co-Pt/γ-Al2 O3 fischer–tropsch catalyst tested in a laboratory-scale tubular reactor",
abstract = "A Co-Pt/γ-Al2 O3 catalyst was manufactured and tested for Fischer–Tropsch applications. Catalyst kinetic experiments were performed using a tubular fixed-bed reactor system. The operative conditions were varied between 478 and 503 K, 15 and 30 bar, H2 /CO molar ratio 1.06 and 2.11 at a carbon monoxide conversion level of about 10{\%}. Several kinetic models were derived, and a carbide mechanism model was chosen, taking into account an increasing value of termination energy for α-olefins with increasing carbon numbers. In order to assess catalyst suitability for the determination of reaction kinetics and comparability to similar Fischer–Tropsch Synthesis (FTS) applications, the catalyst was characterized with gas sorption analysis, temperature-programmed reduction (TPR), and X-ray diffraction (XRD) techniques. The kinetic model developed is capable of describing the intrinsic behavior of the catalyst correctly. It accounts for the main deviations from the typical Anderson-Schulz-Flory distribution for Fischer–Tropsch products, with calculated activation energies and adsorption enthalpies in line with values available from the literature. The model suitably predicts the formation rates of methane and ethylene, as well as of the other α-olefins. Furthermore, it properly estimates high molecular weight n-paraffin formation up to carbon number C80.",
keywords = "Carbide mechanism, Co-Pt/γ-Al O, Cobalt, Fischer, Kinetic model, Platinum, Tropsch synthesis",
author = "Marco Marchese and Niko Heikkinen and Emanuele Giglio and Andrea Lanzini and Juha Lehtonen and Matti Reinikainen",
note = "project 114423",
year = "2019",
month = "8",
day = "26",
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language = "English",
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Kinetic study based on the carbide mechanism of a Co-Pt/γ-Al2 O3 fischer–tropsch catalyst tested in a laboratory-scale tubular reactor. / Marchese, Marco (Corresponding Author); Heikkinen, Niko; Giglio, Emanuele; Lanzini, Andrea; Lehtonen, Juha; Reinikainen, Matti.

In: Catalysts, Vol. 9, No. 9, 717, 26.08.2019.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Kinetic study based on the carbide mechanism of a Co-Pt/γ-Al2 O3 fischer–tropsch catalyst tested in a laboratory-scale tubular reactor

AU - Marchese, Marco

AU - Heikkinen, Niko

AU - Giglio, Emanuele

AU - Lanzini, Andrea

AU - Lehtonen, Juha

AU - Reinikainen, Matti

N1 - project 114423

PY - 2019/8/26

Y1 - 2019/8/26

N2 - A Co-Pt/γ-Al2 O3 catalyst was manufactured and tested for Fischer–Tropsch applications. Catalyst kinetic experiments were performed using a tubular fixed-bed reactor system. The operative conditions were varied between 478 and 503 K, 15 and 30 bar, H2 /CO molar ratio 1.06 and 2.11 at a carbon monoxide conversion level of about 10%. Several kinetic models were derived, and a carbide mechanism model was chosen, taking into account an increasing value of termination energy for α-olefins with increasing carbon numbers. In order to assess catalyst suitability for the determination of reaction kinetics and comparability to similar Fischer–Tropsch Synthesis (FTS) applications, the catalyst was characterized with gas sorption analysis, temperature-programmed reduction (TPR), and X-ray diffraction (XRD) techniques. The kinetic model developed is capable of describing the intrinsic behavior of the catalyst correctly. It accounts for the main deviations from the typical Anderson-Schulz-Flory distribution for Fischer–Tropsch products, with calculated activation energies and adsorption enthalpies in line with values available from the literature. The model suitably predicts the formation rates of methane and ethylene, as well as of the other α-olefins. Furthermore, it properly estimates high molecular weight n-paraffin formation up to carbon number C80.

AB - A Co-Pt/γ-Al2 O3 catalyst was manufactured and tested for Fischer–Tropsch applications. Catalyst kinetic experiments were performed using a tubular fixed-bed reactor system. The operative conditions were varied between 478 and 503 K, 15 and 30 bar, H2 /CO molar ratio 1.06 and 2.11 at a carbon monoxide conversion level of about 10%. Several kinetic models were derived, and a carbide mechanism model was chosen, taking into account an increasing value of termination energy for α-olefins with increasing carbon numbers. In order to assess catalyst suitability for the determination of reaction kinetics and comparability to similar Fischer–Tropsch Synthesis (FTS) applications, the catalyst was characterized with gas sorption analysis, temperature-programmed reduction (TPR), and X-ray diffraction (XRD) techniques. The kinetic model developed is capable of describing the intrinsic behavior of the catalyst correctly. It accounts for the main deviations from the typical Anderson-Schulz-Flory distribution for Fischer–Tropsch products, with calculated activation energies and adsorption enthalpies in line with values available from the literature. The model suitably predicts the formation rates of methane and ethylene, as well as of the other α-olefins. Furthermore, it properly estimates high molecular weight n-paraffin formation up to carbon number C80.

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KW - Co-Pt/γ-Al O

KW - Cobalt

KW - Fischer

KW - Kinetic model

KW - Platinum

KW - Tropsch synthesis

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