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Abstract

This study of the effect of support of Co-Na-Mo based catalysts on the direct hydrogenation of CO2 into hydrocarbons (HC) provides guidelines for the design of catalysts for CO2 conversion. We demonstrate that the surface area of the support and the metal-support interaction have a key role determining the cobalt crystallite size and consequently the activity of the system. Cobalt particles with sizes 2 and ZSM-5 supports not only substantially increases the CO2 conversion but it also provides high HC selectivities. Further increase of the cobalt particle size to 25-30 nm has a detrimental effect on the global CO2 conversion with HC:CO ratios below 1, however, lower methane selectivity and enhanced formation of unsaturated HC products are achieved. Additionally, the metal-support interaction potentially also has a strong effect on the growth chain probability of the formed hydrocarbons, increasing as the metal-support interaction increases. These evidences demonstrate that CO2 conversion and hydrocarbon distribution can be tuned towards desired products by controlled catalyst design.

Original languageEnglish
Pages (from-to)97-103
Number of pages7
JournalJournal of CO2 Utilization
Volume16
Early online date13 Jul 2016
DOIs
Publication statusPublished - 1 Dec 2016

Fingerprint

Carbon Monoxide
Hydrocarbons
Catalyst supports
catalyst
hydrocarbon
Catalysts
Cobalt
cobalt
Metals
metal
particle size
Methane
Crystallite size
Hydrogenation
effect
surface area
methane
Particle size

Keywords

  • Carbon dioxide
  • Cobalt
  • Fischer-Tropsch
  • Hydrocarbons
  • Support

Cite this

Effect of support of Co-Na-Mo catalysts on the direct conversion of CO2 to hydrocarbons. / Owen, Rhodri E.; Plucinski, Pawel; Mattia, Davide; Torrente-Murciano, Laura; Ting, Valeska P.; Jones, Matthew.

In: Journal of CO2 Utilization, Vol. 16, 01.12.2016, p. 97-103.

Research output: Contribution to journalArticle

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AU - Plucinski, Pawel

AU - Mattia, Davide

AU - Torrente-Murciano, Laura

AU - Ting, Valeska P.

AU - Jones, Matthew

PY - 2016/12/1

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AB - This study of the effect of support of Co-Na-Mo based catalysts on the direct hydrogenation of CO2 into hydrocarbons (HC) provides guidelines for the design of catalysts for CO2 conversion. We demonstrate that the surface area of the support and the metal-support interaction have a key role determining the cobalt crystallite size and consequently the activity of the system. Cobalt particles with sizes 2 and ZSM-5 supports not only substantially increases the CO2 conversion but it also provides high HC selectivities. Further increase of the cobalt particle size to 25-30 nm has a detrimental effect on the global CO2 conversion with HC:CO ratios below 1, however, lower methane selectivity and enhanced formation of unsaturated HC products are achieved. Additionally, the metal-support interaction potentially also has a strong effect on the growth chain probability of the formed hydrocarbons, increasing as the metal-support interaction increases. These evidences demonstrate that CO2 conversion and hydrocarbon distribution can be tuned towards desired products by controlled catalyst design.

KW - Carbon dioxide

KW - Cobalt

KW - Fischer-Tropsch

KW - Hydrocarbons

KW - Support

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